Roof of the industrial building from profiled sheet. Roof device from corrugated board: design and installation features
One of the most inexpensive, durable, practical options for roofing material is, or, as they say, a professional sheet, a metal profile. This is a sheet of metal that is coated with several protective layers, and then passed through a forming machine, which presses projections and grooves into it - to make it more rigid. The material turns out to be quite light, corrugated roofing can be mounted independently and even "in one hand". The technology is not the most difficult, it is quite possible to do it yourself.
Types of corrugated board
There are different types of corrugated board. There is a regular profiled sheet - galvanized, there is a colored one - with a layer of polymer applied over the zinc coating. The polymer coating has a double role - it both protects against external influences and gives the material a more decorative appearance. Simple galvanized corrugated board is used as a roofing material mainly on temporary buildings, colored has a very solid appearance, it can be seen on the roofs of residential buildings and courtyard buildings.
By appointment
Decking is made from sheet metal of various thicknesses. The thinnest ones are designed for decorating walls, but can be laid on the roof with frequent lathing and small snow loads. The sheets of this group are marked with the letter "C".
From the thickest metal, a material with increased bearing capacity is made. It is marked with the letter "H", used as a roofing material in areas with increased wind or snow load. There is also a universal profiled sheet - it is designated "NS". It can be used both for walls and for roofing (the amount of snow should be average).
After the letter encoding of the profiled sheet, there are numbers: C8, H35, HC20. They indicate the height of the wave in millimeters, which is formed in this material. In the example, these are 8 mm, 35 mm, 20 mm, respectively. A corrugated board with a wave height of at least 20 mm is laid on the roof.
The waveform of the supporting metal profile is often more complex - additional grooves are added to it to increase rigidity.
By type of coverage
With all the external similarity, the price of corrugated board of the same type can differ significantly. The point, most often, is not the impudence of the manufacturer or seller, but the different technologies and materials that are used in production. For example, the protective coating may be zinc and aluminum-zinc. The second type of protection has appeared recently, the equipment is expensive, but the durability of metal coated with aluminum zinc is much higher.
The method of wave formation also affects the durability of the coating. There are two technologies - cold rolling and emulsion. During cold rolling, the sheet is simply pressed through by rollers without any preparation. In order not to damage the previously applied coating, expensive equipment is required. Accordingly, cold rolled profiled sheet is more expensive.
When forming a wave with an emulsion, the metal surface is wetted with a liquid (oil, water, special liquid) and then sent under the rolls. If, after rolling, such a sheet is not dried, but sent to a firing oven to fix the paint, then the places that were wet will quickly begin to rust. It is impossible to see this defect in advance, one has to hope that the technology is not broken. But the profiled sheet made using this technology is cheaper.
There are also different polymer coatings. They create a film of different thickness and density, with different properties.
- Polyester (glossy and matte). Polyester-coated profiled sheet has a relatively low price (the cheapest of the colored ones) and good characteristics - the coating is plastic, does not change its color for a long time. Matte polyester has no glare on the surface, it looks like velvety. This is achieved by a different application technique and a thicker layer. This coating is the most resistant to mechanical damage.
- Plastisol. It has increased resistance to aggressive environments, but does not tolerate ultraviolet light. A corrugated roof with a plastisol coating will fade quickly (two to three years).
- Pural - polyamide and acrylic are added to polyurethane. The coating is more uniform, the service life without color change is from ten years. The disadvantage is the high price.
- PVDF is a compound of polyvinyl fluoride and acrylic. The coating is expensive, but it lasts a long time even in an aggressive environment. This roofing material can be used on sea coasts. Another of its remarkable properties is that it can self-clean. The slightest rain, and the PVDF-coated corrugated roof shines like new.
Under normal conditions, roofing is made of corrugated board with a polyester coating. In terms of price-quality ratio, it is optimal.
How to lay corrugated board on the roof
Roofing from corrugated board is laid on a finished crate of boards, in which the fragments are arranged parallel to the roof overhang. The installation step of the crate is up to 60 cm. They usually use an edged inch board, 25 mm thick. Sheets are stacked one after another with vertical overlap on one wave. When laying the profiled sheet on the roof, please note that the extreme shelves have different lengths. The one that is a little shorter should be at the bottom, which is a little longer - it covers the short one. In this case, they adjoin one another tightly, without a gap. If you confuse and do the opposite, then a gap of several millimeters is formed between the two shelves, into which water will flow. Therefore, be careful during installation.
On the amount of horizontal overlap. If there is more than one row of corrugated board on the roof, the sheets are laid with overlap. The amount by which the top sheet overlaps the bottom sheet depends on the angle of the roof slope: the more gently sloping the roof, the more entry is needed.
Most decking factories can offer you sheets that will cover your entire roof - from ridge to eaves - in one long sheet (maximum length 12 meters). During installation, this creates certain difficulties - such sheets are difficult to lift and stack. Especially it will take a long time to expose the first sheet - it must be placed strictly vertically, which is difficult at a height. But the main advantage of such a solution is a continuous coating from top to bottom, which at times increases the degree of protection of the attic from moisture penetration, crosses out all the inconveniences. After all, there are no horizontal joints, which means there are no problems with leakage either.
How to fix corrugated board on the roof
To fasten the profiled sheet, special self-tapping screws with rubber gaskets under the caps are used. They provide a tight connection. Such self-tapping screws are usually painted in the same tone as the roofing material. The number of fasteners per square meter is 5-7 pieces (do not forget to add about 20% for fastening the ridge element, fixing joints and other similar work).
Self-tapping screws are installed in the lower shelf, where the sheet is in contact with the crate. Their length is 20-25 mm, depending on the thickness of the board of the crate, since it is important that the sharp end of the screw does not protrude from the back of the board. There will be a waterproofing film that can be damaged.
When connecting two adjacent sheets, they are also fastened with self-tapping screws. But in this case, you have to screw the fasteners into the wave, and also punch through a double layer of metal. For these purposes, the fasteners are longer - 40 mm or more (depending on the height of the wave) - the screw must go into the crate board.
How to cut
Very rarely, the installation of corrugated roofing does without trimming - these are just unique cases. How to cut a profiled sheet? Metal shears or electric jigsaw. Yes, it's slow, and not very convenient, but that's exactly what the manufacturers advise. It is impossible to use an angle grinder (grinder) - when cut with it, the sheet heats up to very high temperatures at the cut point, which leads to the evaporation of zinc. As a result, in this place, the material quickly begins to rust.
Mounting order
After assembling the truss system, the front board is nailed, hooks are attached to it for installation, and on top of a special bar - a dropper, on which the edge of the waterproofing film is then wound. Both the dropper and the film are attached to it with self-tapping screws with a sealing rubber washer.
The composition of the pie of materials for corrugated board depends on whether you are going to make the attic space cold or warm. If the attic is cold, the sequence of actions is as follows:
If the roof will be insulated, the order of work and the amount of required materials will change. There will be more layers:
Roofing from corrugated board: knots
Even with a conventional gable roof, there are several complex sections that are usually formed at the junction of different planes and / or parts of the system. These areas are called "nodes". We considered one such knot in the previous paragraph - the design of the front board and the fastening of drains. But this is far from the only node where a detailed explanation is required.
Installation and sealing of the ridge
The under-roof space under the corrugated board should be well ventilated. This material heats up quickly and also cools down quickly, which contributes to the formation of condensation. Therefore, when installing a metal profile on the roof, in the upper part, the sheets on both sides do not join closely, but leave a gap of several centimeters - so that air can freely escape, taking water vapor with it.
If there are special skates with ventilation (pictured), but even if you just install a regular ridge element between the profiled sheet and its edge, you get a large number of holes - in each corrugation cavity. The size of this gap depends on the height of the wave - the higher the wave, the larger the gaps. On the overhang, where the front board is nailed, there are also similar holes. Air movement usually goes from bottom to top - from the overhang, through the under-roof space (for this, it is necessary to leave ventilation gaps that are formed by the crate when installing the roofing material), to the slots in the ridge. This is how the ventilation and regulation of the humidity of the insulation takes place, the condensate evaporates and is carried away.
Large gaps are good for ventilation, but precipitation clogs in them when it rains / snows with the wind, and dust and leaves get into the attic through them. It is much worse if the holes are clogged with leaves - ventilation will immediately deteriorate. In order not to get into a similar situation, earlier about 2/3 of the height of the gap was filled with sealant, applying it in layers to the roofing material. Crawling back and forth with sealant on the top of the roof, waiting for the previous layer to polymerize a little, is not very convenient. Also, this decision is wrong from the point of view of ventilation - the gap decreases, air movement worsens. But there was no other solution. Now it is - a sealant for corrugated board. It is made from polyurethane foam, polyethylene or wood composite. The structure of these materials is porous, well passes air, but not dust, water or leaves. In shape, it either repeats the shape of the corrugations - there are different types of profiled sheets, and there is also a universal tape, which is simply pressed in the right places.
The sealant "sits" on the sealant, double-sided tape, glue, there are options with self-adhesive tape. With such a seal, air passes freely, and precipitation remains in the outer layers, from where it then evaporates.
Overhang filing with profiled sheet
In order to sheathe the overhang with a profiled sheet, a special profile is attached to the front board. A profiled sheet is inserted into its groove, cut into strips of the desired width. The second edge of the filing is attached to a board nailed to the ends of the rafters. The junction of the filing and the board is closed with two droppers - one is nailed from below, covering the lower half of the board, and the second - from above. The edge of the waterproofing film is then laid on it.
If a drainage system is to be attached, then the hooks for the gutters are nailed after the installation of the lower dripper. The top dropper is nailed after all the hooks are installed.
Adjacency of corrugated board to the wall
In some cases, a metal profile roof is adjacent to the wall of some structure. How to make a connection so that there are no leaks? There are two options (see picture). Both use a corner bar, only it has a different size and a different profile.
You can take a corner bar with shelf dimensions of 150 * 200 mm. A shorter side is brought to the wall, a longer side to the roof They are attached to the wall using fasteners depending on the material from which it is made (nails or self-tapping screws if it is wood, dowels if brick and building blocks). The junction of the plank with the wall is covered with silicone sealant. From the side of the roof, a bar is attached to the crest of the wave by installing special self-tapping screws with rubber washers. Their length is determined in the same way as when connecting adjacent sheets of corrugated board (wave height + 20 mm for entering the crate board).
The second option is more time-consuming: a strobe (groove) is made in the wall, into which an angle bar with shelves bent at 45 ° is inserted. The fastening in this case is similar, the difference is in the dimensions of the bar - it can be 100 * 100 mm or so.
Pipe passage
Many questions arise when sealing the passage of a chimney pipe or ventilation through a corrugated roof. Pipes in cross section are round and rectangular, each type has its own solution.
For the passage of round pipes through the roofing material, there are special steel or polymer aprons. Their upper part is made in the form of a cone, the lower part - a skirt - is made of an elastic material that can take a given shape. The apron is tightly put on the pipe, lowered so that the "skirt" lies on the roofing material. Next, you need to give the elastic skirt the shape of the corrugations. Use a hammer for this (normal or rubber - depends on the type of apron). To prevent water from flowing under the skirt, the joint is smeared with sealant, pressed well.
After fixing the skirt, the neck is fixed. If the apron is metal, the top is covered with a clamp, tightened, the joint is coated with sealant. When using a polymer apron (master flush), it is put on the pipe with a decent effort (sometimes it is even necessary to lubricate the pipe with soapy water), but the joint, nevertheless, for reliability, is sealed.
With a rectangular (brick) pipe, everything is somewhat more complicated. Elements are cut out of metal sheets that close the joint with the roofing pie.
Modern roofing technologies involve the use of a wide range of materials that are characterized by excellent performance and affordable price. In most cases, a profiled sheet is used for roof construction ( corrugated board, professional sheet) or sandwich panel. The correct technology of corrugated roofing provides high-quality protection of building structures of any configuration ( metal frame sandwich panels or capital) from the harmful effects of the environment. Due to the ease of installation, low cost and long service life, the profiled sheet is used both in civil and industrial construction.
From our article you will learn:
- About the stages of construction
- Important recommendations, rules and features of corrugated roofing
- How to equip a gable cut, snow barriers (their types) and insulate the roof
- About corrugated board: types, marking, advantages
- About roof options
- Roof care during operation
- About services for the installation of high-quality roofing from SMK Group of Companies
Design features of corrugated board
The profiled sheet is made using the technology of cold rolling of hot-dip galvanized steel sheets. During the production process, profiled steel sheets are covered with several protective layers, which significantly increases their durability and resistance to various negative factors. At the first stage of applying protective coatings, blanks for corrugated board are opened with a special anti-corrosion phosphate, after which it is allowed to apply a primer.
To prevent mechanical damage to the protective coating during storage and transportation, the profiled sheet is covered with a layer of dense polyethylene film.
The main stages of the construction of a corrugated roof
Installation and laying instructions for corrugated roofing include a wide range of technological operations that are performed in the following sequence:
- Delivery of profiled sheet to the construction site and its lifting to the roof.
- Fixation and flooring of roofing material begin from the slopes, namely from the end. It should be noted that the side overlap of adjacent sheets should be at least one half-wave. In a pitched roof with an angle of inclination of the order of 8 - 12 degrees, it is customary to carry out an overlap of one and a half profile waves. Thanks to this installation scheme, the likelihood of water leaks in the area of \u200b\u200bjoining adjacent profiled sheets is significantly reduced.
- The fastening of profiled sheets to the crate is carried out using specialized self-tapping screws installed in the lower segment of the wave. In case of fixing the corrugated board in the upper part of the wave, self-tapping screws with a working part of 8 centimeters or more should be used, which are installed along the ridge and overlaps.
- Absolutely all joints are filled with bitumen mastic and self-adhesive sealing tape.
- The pediment of the roof is additionally sealed by wind pads, which provide reliable protection against wind blowing and subsequent destruction of the roof structure. The wind bar is fastened with self-tapping screws with a pitch of 200 mm.
- To overlap the ribs and other functional elements adjacent to the vertical structures, a metal profile is used in combination with bitumen mastic.
Self-tapping screws for corrugated board are characterized by the presence of a hat with six edges and a sealing gasket.
Roofing technology from corrugated board: important rules and recommendations
1. Roof pitch and overlap
Competent and correct installation of corrugated roofing involves the use of the angle of inclination of the slopes as a criterion for determining the amount of overlap:
- For a roof with a slope of more than thirty degrees, the overlap of adjacent sheets is about 15 centimeters.
- For a roof slope in the range of twelve to fifteen degrees, the overlap of profiled steel sheets is at least 20 centimeters.
- With a roof slope in the range of thirty to fifteen degrees, an overlap of roofing materials of 15 to 20 centimeters is performed.
- For a roof with an angle of inclination of less than twelve degrees, additional sealing of overlaps is used using silicone-based sealing compounds.
2. Preliminary preparation
Immediately before the start of construction and installation work, you should correctly calculate the required number of profiled sheets, additional roofing elements and self-tapping screws. To do this, you can use the services of specialists who have the necessary level of qualification and experience in carrying out such calculations. During transportation of roofing material, sheets should be laid on a flat surface to avoid strong kinks. With the manual method of loading and unloading, one worker should be provided for every two meters of the length of the profiled sheet. In the case of using lifting equipment, soft fabric slings are used. Before starting work, be sure to prepare all the necessary tools and fixtures: a hammer, a rail, drills, a screwdriver, a tape measure, a hacksaw, a plumb line, etc.
3. Ventilation and waterproofing device
During the operation of buildings and structures, due to a sharp difference in temperature indoors and outdoors, the process of moisture condensation begins to develop under the roof. To prevent the occurrence of such negative phenomena, measures should be taken to equalize the temperature gradient, install a reliable vapor barrier, waterproofing, and ventilation of the space under the roof. The waterproofing layer is performed directly on the crate before fixing the sheets of corrugated board.
During the installation of waterproofing materials, it is necessary to provide a slight allowance at the edges of the order of 20 mm. The fixing of the waterproofing film starts from the lower edge of the roof of the ridge. When connecting several individual waterproofing elements, an overlap of 10 cm to 15 cm must be performed with sealing with a reinforced self-adhesive tape.
To organize the effective movement of air masses under roofing materials, a ventilation gap is made between the sheets of corrugated board and the ridge bar. The easiest way to achieve a sufficient level of ventilation is to provide additional air space between the waterproofing and the roof. For this method of ventilation, the placement of wooden slats of the required thickness is required. On top of the waterproofing film, a vapor barrier is installed, which prevents the passage of condensed moisture to the insulation and roofing sheets.
4. Arrangement of the crate
The installation of the crate begins with the installation of steel supporting structures (with a profiled sheet wave height of more than 40 mm) or rafters on top of the vapor barrier material. Subsequently, the crate is fixed to these structural elements at a distance that depends on the type and configuration of the corrugated board. The crate is performed using boards, timber and plywood. Possible options for the device of the crate are shown in the figure below:
A solid crate is used in the area of the chimney, ribs and ridge trim. The thinned lathing is carried out in increments of about 5 centimeters, which saves a significant amount of building materials, without compromising performance. All wooden structural elements must be treated with a special fire-fighting mixture and antiseptics. If there is a financial opportunity, a special diffusion film should be used, which is laid directly on the crate. This film limits the formation of condensed moisture, which has a positive effect on the operation of the roof. The configuration of the structural elements of the crate is selected taking into account the type and geometric dimensions of the corrugated board.
5. Eaves overhang device
The cornice overhang is a special structural element of the roof, which protects the building from precipitation, drains rainwater, shades the house from the sun, and prevents the basement from getting wet. For the installation of a cornice overhang, sheets of corrugated board are laid on the lower edge of the crate. Before performing the installation of the roofing material, it is necessary to provide for the installation of a cornice strip under a layer of waterproofing. This design ensures that condensed moisture flows into the catchment system.
6. Features of cutting corrugated board
The best option for quick installation of the roof would be to purchase profiled steel sheets of appropriate sizes. But, this is far from possible in all cases, so you should know the basic rules for cutting corrugated board directly at the installation site. To perform such work, you must have a flat place with a hard surface. It is recommended to use electrified tools as tools: metal shears, electric jigsaw, etc. In the absence of a tool with electric drives, a metal file is used.
It is forbidden to use tools with a dynamic cutting element (for example, grinders) for cutting profiled steel sheets. This is due to increased heating of the cut edge, which will negatively affect the performance of the roofing material. In the presence of minor chips and damage, it is allowed to color them to match the sheets of corrugated board.
7. How to lift sheets of corrugated board
Due to the large geometric dimensions of profiled steel sheets, it is very often difficult to lift them to the installation site. The best option for performing such an operation is to use a log. To do this, one end of the log is set with an emphasis on the ground, and the other end rests on the eaves of the ramp. Between the lags leave a distance that is slightly less than the width of the roofing material itself.
8. Features of fastening corrugated board
When attaching a profiled sheet, certain rules should be followed:
- Profiled steel sheets are fixed to the crate using self-tapping screws that have a hexagonal head and special sealing gaskets.
- The tightening torque of the screws should not exceed the recommended value. Otherwise, the integrity of the gasket may be violated and, accordingly, the loss of tightness.
- The installation of self-tapping screws is carried out strictly perpendicular to the surface of the crate and profiled sheet.
- Along the entire length of the joints of the sheets, an additional seal is made with bituminous mastic or tape with a self-adhesive surface.
- It is recommended to start laying sheets of steel from the slopes, which will allow you to gradually complete the entire amount of work without much difficulty.
- Fixation of corrugated board is carried out at the bottom of the wave, and in places of overlap and at the ridge bar - on the crest.
- The front roof units are additionally equipped with wind strips, which protect the building from destruction and sudden gusts of wind.
- The length of the screws is selected in accordance with the wave height of the profiled sheet.
Installation of the snow barrier and ridge
The technology of corrugated roofing involves the installation of a ridge and a snow barrier. The arrangement of the ridge begins to be carried out from the side of the roof, which is minimally affected by moisture and wind. Depending on the shape and design features, the skate is figured, simple or tiled. To fix the ridge, self-tapping screws with a sealing gasket are used, which are installed in increments of up to 300 mm.
The snow barrier is a structural element of the roof that provides protection against snow avalanches from the roof of the building during melting. It is mounted perpendicular to the edge of the roof, below the edge. The snow barrier is fixed to pre-installed wooden bars.
Arrangement of the gable cut
Proper installation of the frontal cut will help prevent the breakage of corrugated sheets during bad weather. If there is a roof allowance from the edge of the house by a value of 50 mm to 70 mm, a wind rail with dimensions of 25x80 mm is used. In the absence of an allowance or its small size (up to 50 mm), an additional wind bar is installed. It is fastened with an overlap in the range from 100 mm to 150 mm. At the junction of the building and the roof slope, a bar is installed for the corners, which is fixed in an overlap with the help of self-tapping screws.
How to insulate a corrugated roof
The most favorable in terms of price-quality ratio for roof insulation is basalt wool. In combination with a vapor barrier, this insulation provides reliable thermal insulation of the roof from the effects of outdoor temperatures. Depending on the release form, mineral wool released in sheets or rolls. The insulation is laid in a niche between the rafters. The fixation of heat-insulating materials is carried out with the help of glue or special mounting devices in the form of an umbrella.
A vapor barrier must be laid on top of the thermal insulation material, which prevents the penetration of moisture from the air into the thermal insulation. It is not necessary to insulate the entire surface of the roof. The main task is to minimize losses without insulating the “cold triangle”, which is the space at the top of the roof at a distance of about 350 mm from the ridge. The presence of this area contributes to the presence of air circulation in the space between the ceiling and the roof. In general, the design of the roofing pie will look like this:
Advantages of profiled roofing
The main advantages of using corrugated board as a roofing material:
- Simplicity of technological processing, transportation and installation. Thanks to these advantages, a significant reduction in the construction time of the roof is achieved, which is one of the criteria for the efficiency of the use of the material.
- High resistance to negative environmental influences: ultraviolet radiation, high humidity, sudden temperature changes, exposure to acids and alkalis, sudden gusts of wind, mold, fungi and other microorganisms.
- Excellent decorative quality. The profiled sheet is produced in the entire range of RAL colors, which allows you to choose the color scheme in the required tones and halftones.
- Long service life without deterioration of operational and decorative qualities of material.
- The low weight of corrugated board allows you to significantly reduce the level of requirements for the arrangement of the frame on which it will be installed.
- Profiled sheets have a democratic cost, which is available for any building budget.
Marking (types) of corrugated board
The profiled sheet belongs to the universal building materials. For its manufacture, metal with a thickness of 0.5 to 1 mm is used. Marking includes alphabetic and numeric characters:
- "N". Bearing (the most durable type).
- "FROM". Wall.
- "NS". Universal.
- "MP". Metal-polymer.
Below is a table showing the main types and markings:
The numbers following the letter symbol indicate the height of the wave of the sheet, its overall dimensions. Depending on the type of coating, the material can be: galvanized. Also, corrugated board coated with polyester or Teflon-polyester, PVC with various additives is very popular. PVDF coating provides high resistance to adverse weather conditions. The profiled sheet covered with pural, created on the basis of polyurethane with polyamide, has excellent performance properties. This material is durable, high resistance to ultraviolet radiation, temperature extremes, corrosion, moisture.
Roof options
Depending on the design and functional features, the installation of steel roofs can have two types: pitched and flat.
Benefits of a pitched roof
A pitched roof is characterized by a large number of advantages:
- High efficiency of rainwater drainage due to the presence of a slope.
- It is possible to equip the attic room.
- Possibility to service structural elements of the roof directly from the attic.
Benefits of a flat roof
A flat roof has the following advantages:
- Lower construction cost compared to a pitched roof.
- Ease of installation and subsequent maintenance of the roof and various equipment: air conditioners, antennas, etc.
- The possibility of arranging a summer playground, a greenhouse, a place for family recreation on the roof.
In each individual case, the customer, at the design stage, selects the best option for the roof of the building.
How to care for a corrugated roof
Throughout the life of the corrugated roof, it needs periodic maintenance, which consists in performing the following operations:
- Periodic cleaning of the roof surface from leaves, dirt and other contaminants.
- Regular inspection for defects in the form of damage to the protective zinc layer.
- All places of fastening sheets of corrugated board to the crate are recommended to be additionally treated with special mastic, which will increase the degree of tightness of the roof.
- If there is damage to the paint layer, degrease the defect and apply a protective layer of paint.
- The presence of high-quality protective grounding will significantly reduce the level of static electricity and protect the roof from lightning strikes.
As you can see, the technology of corrugated roofing is not so simple and requires certain experience and knowledge. If you want to entrust this business to competent specialists, then the information below is for you.
Order roofing from corrugated board in SMK Group of Companies
It offers a wide range of services in the field of corrugated roofing for objects of various configurations and purposes. Our managers are ready to provide qualified advice to all potential clients. Prompt calculation of the estimated cost and an integrated approach to solving the problems of installing roofing from profiled sheets favorably distinguishes us from our competitors. Only one phone call to our company will help you quickly solve the most complex tasks of corrugated roofing installation.
Our company also provides services for general contract, construction frame and frameless buildings, turnkey industrial facilities. Below is a video review of the latest built objects:
Today we will talk about such a popular building material as corrugated board. About its advantages and disadvantages, where it is used, and the technology of installation on roofs. After reading the article, you will not need to look for information in other sources. But the main emphasis here will be on information about corrugated roofing.
Source mydesigninfo.ruWhat is corrugated board
This is a galvanized steel sheet with a thickness of 0.35 to 1.2 mm, which is formed by cold rolling into a wave-like material. It is in this way that the bearing capacity of the sheets is increased. In this case, the shape of the corrugation can be wavy or trapezoidal.
Decking is made only from galvanized steel, which has high moisture-proof properties that resist metal corrosion processes, plus increase the life of the material. Today, manufacturers offer painted profiled sheets or coated with a polymer layer. This, firstly, further increases the service life of profiled sheets, and secondly, it becomes possible to choose a coating with a certain color design.
The main parameters of the corrugated board:
sheet thickness;
profile height;
profile width;
working width of the material itself.
Profiled sheet dimensions Source proftehnastil.ru
Advantages and disadvantages
We denote the advantages of the material:
low specific gravity, which facilitates the operations carried out with it;
simple installation process;
low price in comparison with other roofing coverings;
variety of colors;
aesthetic appearance of the roof.
As for the cons:
corrugated board is a metal product, therefore it has a high thermal conductivity, which requires roof insulation;
low soundproofing.
On our website you can find contacts of construction companies that offer roof design and repair services. You can directly communicate with representatives by visiting the exhibition of houses "Low-Rise Country".
Criteria for choosing corrugated roofing
The construction of a corrugated roof begins with the choice of the roofing material itself. Today, manufacturers offer three types of profiled sheets:
Marking "H" indicates the bearing type, used just for roofing.
With the marking "C" wall models are produced, which are most often used for the construction of protective structures and cladding of wall and ceiling surfaces. Although we must pay tribute to the fact that the wall profiled sheet is also used for the construction of roofs of light canopies, terraces and arbors.
"NS" - a universal type used in any building structures, and on roofs as well.
That is, it turns out that any of the above varieties can be used to cover roofs. But there is one important nuance here. If you want a roof built from corrugated board to last a long time and withstand serious loads, then you need to choose a material with a metal sheet thickness of at least 0.55 mm.
Please note that this is the thickness of the metal, which does not include paint or a polymer layer. And if in the store you make a measurement with a caliper, and it will be 0.55 mm, then know that the actual thickness will be 0.5. Please note that this size is not separately indicated in the certificate of conformity. It is indicated on the product label. For example, H75-750-0.9. It is "0.9" that is the thickness of the metal.
As for the dimensions of the profile (height and width), the larger they are, the higher the bearing capacity of the material. But at the same time, the overall dimensions of the profiled sheets are reduced. So, it will be necessary to purchase more elements of the roof covering. For example, corrugated board brand H75-750, where 750 is the width of the sheet. Or C40-1000, where 1000 is the width. That is, the bearing capacity of the roofing material increases, the area of the coating itself decreases.
Rules and nuances of installing profiled sheets on the roof
Installation of corrugated roofing begins with the acquisition of the required amount of material. For example, if a gable roof is covered with it, then it is necessary to measure the width of the slope and divide it by the working width of the sheet. This is the amount per slope. In this case, the length of the profiled sheets is not taken into account, because they are produced either six meters or twelve meters. At the same time, the store will cut the panels to the required length dimensions in increments of 50 cm, starting from 0.5 m and more.
This is another great advantage of corrugated roofing technology. It ensures minimal waste. And if you correctly measure the length of the slope, then the roofing will be without joints. The latter are places of possible leaks, if the angle of inclination of the slope and the size of the overlap of two adjacent elements are incorrectly taken into account.
We turn to the device of the roof from a profiled sheet on a wooden crate.
Sheathing for corrugated board
For this, edged boards with a thickness of 25-35 mm and a width of 100 mm are used. The main design parameter is the distance between the elements. It is determined by the size of the corrugated board itself. The greater its bearing capacity, the greater the distance in the construction of the crate. For example, for profiled sheet H75, the distance between the boards is 1.5-2 m, for C40, the distance is 0.5-0.6 m.
Source repairmontnik.ruVideo description
The process of assembling the crate for corrugated board in the video:
roof covering
First of all, the roofing material must be lifted onto the roof. If the house is one-story, then the easiest way is to install two bars or two boards 50 mm thick with a distance between them less than the width of the corrugated board. The photo below shows how to install the boards.
The lift is done like this:
in one sheet at the edge in the middle a through hole is made;
it is laid on boards so that the hole is at the very bottom;
a couple more sheets can be laid on top;
a hook tied to a rope is inserted into the hole;
from the side of the roof they pull the rope, from below they push it up with their hands.
The installation itself is carried out on either side of the slope. The main task of the manufacturer of works is to set the sheets exactly along the eaves, that is, horizontally. Therefore, it is important to accurately set the first sheet to be fixed. Fastening is carried out with roofing screws with a wide head. At the same time, the self-tapping screws are not completely screwed in, leaving the opportunity to once again check the accuracy of the corrugated board installation. And if everything is correct, then tighten the fasteners to the end.
The sheets themselves are overlapped with an offset of one wave. This ensures a secure closure of the joint between the elements, which ensures that there are no leaks.
The option of raising profiled sheets to the roof Source angara32.ru
Roof covering with individual sheets
If the corrugated roof is made with short sheets (less than the length of the slopes), then it is important to carry out the installation correctly in terms of choosing the overlap of the sheets in the longitudinal direction. This parameter depends on the angle of inclination of the slopes. Here the dependency is:
slope 5-10°, overlap 30 cm;
slope 10-15°, overlap 20 cm;
more than 15° slope, 17 cm overlap.
Fastening rules
The rules for covering the roof with corrugated board include positions related to the correct fastening of the sheets to the crate.
Fastening to the crate is made through the lower wave.
Fastening of two sheets in a transverse overlap is carried out in the upper wave.
Self-tapping screws are screwed strictly perpendicular to the plane of the roof slope.
It is impossible to pinch the fasteners or under-compress it, because in the first case this will lead to a break in the gasket, in the second to its loose pressing. Both reasons are the appearance of leaks at the point of attachment of self-tapping screws to profiled sheets, which will lead to leaks.
Fastening points - along the upper and lower edge of the sheet through the wave, intermediate fastening over the rest of the area after 2-3 waves for each element of the crate.
Installation and fastening of additional elements
Of the additional elements for the roof of profiled sheets, a ridge and pediment strips are used. Cornice strips are installed before the installation of corrugated board, and they are attached to the rafter legs or the first lower element of the crate.
The ridge is closed with a special element, which is attached to the crate through the stacked profiled sheets. Fastening is carried out through the upper wave of the roofing material. The fastener pitch is 20-30 cm. The length of the ridge element is 3 m, so they are overlapped relative to each other with an offset of 10-15 cm.
Gable strips are installed with one purpose - to protect the roofing from the wind, so that it cannot penetrate under the corrugated board and not understand it with its strength. Plus, the aesthetic side of the matter, the completeness of the roof structure is provided. The pediment strips are attached to the profiled sheets in the upper extreme wave. If there is a gable beam in the roof structure, then to it too.
The standard length of the planks is 3 m, they are overlapped with an offset of 10 cm. The fastening step with self-tapping screws is 30-40 cm.
Source profiroof.comWhen choosing a corrugated board for the construction of a roof, it is necessary to choose it correctly according to the type of applied polymer layer. Manufacturers offer several polymers that cover profiled sheets.
The thicker the protective polymer layer, the higher the price of corrugated board. It should be borne in mind that expensive roofing material must be used wisely. It has good technical characteristics, especially wear resistance and resistance to ultraviolet rays. Therefore, it is recommended to use such material in areas with active loads. For example, with the negative impact of air with a high concentration of salt (seaside areas), with an increased concentration of acids and other active substances in the air (large industrial cities).
Online roof calculator
To find out the approximate cost of various types of roofing, use the following calculator.:
Video description
Installation of corrugated board on the roof:
Conclusion
The right choice of corrugated board used as a roofing material, plus its competent installation, is a guarantee of long-term operation of the roof. In addition to the economic side of things, you need to correctly calculate the required amount of roofing.
Roofing on a country house is a decisive moment in its construction. Qualitatively arranged, it can extend the life cycle of a building up to 50 years or more, and manufacturing errors can negate all efforts and investments. The most reliable and easy to manufacture are corrugated roofs.
Roof construction from corrugated board
The basis of the roof structure is the truss system. It is on it that a roofing pie is formed, which performs the following functions:
- Protecting the building from rain and wind.
- Saving heat in the under-roof space. According to experts, they can be up to 20-25% of the heating received from the heating system. The costs incurred during roof insulation are quickly offset by energy savings.
- The possibility of using the insulated under-roof space for organizing additional attic-type living space.
To realize the tasks set, a roofing pie is created from several layers of various materials.
When installing a roofing pie, it is important to ensure that there is a ventilation gap between the waterproofing film and the roofing
crate
It serves as a supporting surface for the finishing coating of the roof. To ensure air circulation in the under-roof space, a counter-lattice is stuffed along the rafter legs, creating a ventilation gap between the rafters and the roofing.
Most often, the material for the crate is a board measuring 25x100 mm, edged or unedged. When installing unedged wood, it must first be sanded. You should be careful not to use a wider board, because when the temperature and humidity in the under-roof space change, it warps. The result may be swelling of the roof finish and damage to the adjacent layers of the roofing cake.
Under the decking from the profiled sheet, the crate is stuffed with different spacing of the boards, depending on the slope of the slopes:
- On roofs with a slope of up to 10 degrees, a gap between the boards of up to 5 cm is allowed.
- On slopes up to 30 degrees, the gap can be up to 45 cm.
- Roof slopes of 45 degrees or more make it possible to make a sheathing step equal to 60–70 cm.
2-3 upper boards of each slope under the ridge space are installed closely.
The lathing is stuffed on top of the waterproofing film, reinforced on the rafters by the planks of the counter-lattice. The distance between the boards is set using special spacers made from wood trimming. The fastening of the batten to the planks of the counter batten is carried out with two nails at each intersection. This method of fixing increases the strength of the truss system.
The crate is mounted on top of the hydroprotection and the counter-crate, fixing it at each intersection with two nails.
counter grating
As mentioned above, this roof element creates an air gap between the roof finish and the waterproofing film. If this condition is not met, the condensate remains under the roofing material, impregnates the wooden parts, contributing to the development of fungal infections and rotting of the wood. In this case, soon after the installation of the roof, urgent repairs may be needed with a complete replacement of the truss system of the house.
Before installing the counter-lattice on the rafter, you need to stretch the moisture-proof film. The elements of the counter-lattice are stuffed onto each rafter leg over the film. For it, bars with a size of 25x50 mm are used, and with a large roof plane - 40x50 mm. There is no need to use large-sized material, this leads to a heavier structure and an increase in financial costs. In addition to creating a ventilation gap, the installation of a counter-lattice makes it easier for workers to move along the roof and evenly, without distortions, stretch the moisture-proof film.
The counter-lattice is laid in horizontal rows and attached to the rafter legs, firmly fixing the waterproofing film.
The bars of the counter-lattice are attached to the rafter legs with nails at least 70 mm long in increments of about 20 cm. It is allowed to leave gaps between the individual bars, depending on the type of finish. The counter-lattice can be installed on any insulating materials, including membranes, roofing felt, etc. It is suitable for all types of finishing coatings, including corrugated board, ondulin, metal tiles, etc.
Video: crate for corrugated board
Waterproofing
The purpose of the roof is to protect the internal space of the building from the effects of adverse environmental factors. One of them is water that falls in the form of precipitation and comes as condensate from the finish coat. This problem is solved not only by the selection of high-quality roofing material, but also by the installation of a waterproofing layer in the roofing pie.
For this, various types of materials are used:
- Roll. These include the well-known roofing material, as well as a number of modern products of this type.
- Coating. These materials are represented by various types of bituminous mastics.
- Film. The most common type of waterproofing materials, especially in individual construction. The attractive side is the low price in comparison with other products of similar purpose.
- Diffusion. Relatively new and most expensive material. The difference is the ability to pass moisture only in one direction, which allows the roofing cake to dry out during operation.
Roll waterproofing
The construction market is represented by a variety of types:
The main advantages of roll insulation include:
- Low cost.
- High reliability.
- Sufficient durability. The service life of such material is up to 15 years. In places of wear, it does not need to be dismantled; it is enough to lay several layers of a new coating on top of the old roof.
The disadvantage of roofing material is the relative complexity of installation associated with the use of bituminous mastic. But if you use euro- or glass roofing material, this need is no longer necessary, you just need to heat the lower surface of the material with a gas burner. The result is a reliable fastening to the roof, which completely eliminates the possibility of leaks.
Mastic for roof insulation
Mastics are used to insulate flat roofs and gentle slopes. Their popularity is due to the following reasons:
Along with a lot of advantages, this material has one significant drawback - fragility. The maximum service life is five to six years. Then the surface begins to swell and crack.
Film insulating materials
These are the most popular means for waterproofing, primarily because of the low cost and ease of installation. The most commonly used polyethylene film with a thickness of 200 microns. It is laid in strips with an overlap of 12–15 centimeters. The junction is additionally glued with adhesive tape. On sale there are films with a sticky edge at the docking point. They are easier to install, but cost a little more.
Films with an anti-condensation layer on the reverse side are also produced. This layer is able to retain moisture on itself, so that it does not enter the insulation.
Photo gallery: film materials for waterproofing
To install inexpensive waterproofing, a conventional polyethylene film is used. The film must be laid with a slight sag in order to compensate for possible linear expansions during operation. The waterproofing membrane "Ondutis" can serve as an independent roof covering for several months Polyethylene building films often have a rubberized base and are excellent at retaining moisture.
Diffusion materials
This is a new material in the market of waterproofing products. Its peculiarity is that it passes moisture in only one direction. The installation of such a film on the inside of the roofing cake is carried out to constantly dry it from accidentally getting moisture.
There are three main types of films with one-sided permeability:
Vapor barrier materials
Installing a vapor barrier when forming a roofing pie is vital. If the waterproofing layers of the roof are designed to protect the house from the penetration of water from the outside, then the vapor barrier protects the insulation from moisture from the inside of the building. Its accumulation inside the insulating layer quickly disables the wooden structures of the truss system, anticipating an early overhaul of the roof.
The vapor barrier must be placed below the insulation of the roofing pie, this makes it possible to intercept steam from the room, preventing it from entering the roof. If the roof is not insulated, a vapor barrier is still necessary, otherwise the living conditions in the house may be equal to those in the greenhouse.
The vapor barrier film protects the roofing pie from moisture coming from inside the room.
Most often, various films based on polyethylene are used for this purpose. They can be waterproofing, vapor barrier or antioxidant. The peculiarity of the latter is that one side is covered with a fleecy fabric that actively absorbs water, preventing it from getting on the insulation.
Previously, parchment was used for vapor barrier, but new materials on other bases are significantly superior to it.
Depending on the physical and technical parameters, there are three main types of materials for vapor barrier:
Roof insulation
The need for thermal insulation is associated with large heat losses in the under-roof space of an uninsulated roof. According to experts, it can be up to 30% of the total amount of heat generated by thermal units. Given the long heating period in most of the country, the losses are very significant. Therefore, the cost of roof insulation will pay off quickly.
According to what indicators to choose the best insulation:
- Durability - stable operation of the insulation layer during the maximum life of the building.
- Fire safety and water resistance.
- Environmental safety - during operation, the insulation should not emit hazardous fumes or solid particles into the atmosphere.
- Sufficient density, low specific gravity and shape stability under the roof.
- soundproofing properties.
- effective thickness.
- Stability when exposed to low temperatures.
When choosing an insulating material for a pitched roof, attention should be paid to the following points:
The technology for installing a heater is as follows:
- Lay a layer of waterproofing.
- Measure and cut the insulation for laying between the rafters. At the same time, it must be remembered that it must be tightly, without gaps, placed in the opening. It is important to arrange a gap between the insulation layer and the waterproofing of at least 20 millimeters.
- Lay the insulation in the direction from the bottom up.
The insulation must be laid tightly between the rafters, the joints between the plates must be overlapped with a layer located on top
- When placing insulating materials, their sagging should be avoided. Gaps between fragments are undesirable. However, it should be borne in mind that during operation, the insulating layer tends to increase in volume.
- Install vapor barrier. It should be controlled that its front side is directed into the room. Then the moisture from the roofing cake will be brought out.
The vapor barrier membrane is laid from the side of the room and fixed with a stapler to the rafters
- Fix the vapor barrier film to the beams with a stapler, glue the joints with adhesive tape.
- Install the bars on top of the vapor barrier film, which will serve as the basis for finishing the surfaces.
Video: pitched roof insulation
profiled sheet
For the device of the finishing coating of the roof, corrugated board is increasingly being used. This is due to its excellent strength characteristics, a large selection of colors and shades, simple installation technology and affordability of the material.
A more complete list of the advantages of this material can be presented as follows:
- Ecological purity.
- The widest palette of color schemes of the coating, which allows you to choose a harmonious combination with other structures on the site.
- A wide range of protective coatings for any operating conditions.
- Affordable cost.
- The ability to order the material strictly in accordance with the lengths of the slopes in order to produce a seamless roof.
The choice of a specific type of profiled sheet depends on the angle of inclination of the slopes. The material must be able to drain water during summer rains and spring snowmelt, as well as withstand snow loads in winter. The vertical overlap of the sheets also depends on the angle of inclination - the smaller the angle, the greater the overlap.
For example:
- at an angle of inclination up to 10 degrees, the overlap should be at least 300 mm;
- on slopes with a slope of 10–15 degrees, the overlap is from 200 mm;
- with slopes of 15–30 degrees, an overlap of 170–200 mm is allowed;
Different brands of corrugated board differ in strength, wave height and material thickness
When choosing corrugated roofing, first of all, you need to pay attention to the labeling of products:
- The letter "H" denotes a sheet used for roofs or floors.
- The designation "NS" indicates the universal nature of the profile. It can be used for roofing and wall finishing, as well as for the construction of site fencing.
- Marking "C2" is provided with a profiled sheet intended exclusively for wall coverings.
It is important to understand that the strength of the sheet depends on its thickness and profile height. The profiled sheet is produced with a corrugation height from 10 to 114 mm from metal with a thickness of 0.4–1.0 mm.
Fastening sheets of corrugated board
Sheets of corrugated board are attached to the crate with self-tapping roofing screws. Their installation is carried out both on the crest of the corrugation and in the depression, closely adjacent to the crate. The lower fastening is made with self-tapping screws up to 30 millimeters long, the screw length for the upper fastening consists of the profile height plus 30–40 millimeters. The lower fastening is made in the depression following the overlap. A washer and an elastic gasket are installed under the hex head of the screw, blocking the flow of moisture into the under-roof space.
The number of attachment points depends on the pitch of the crate - one screw per board.
Video: installation of corrugated roofing
The process of creating a roof from corrugated board is simple and straightforward. There are enough materials in the construction markets both in quantity and quality. You need to find the determination in yourself, take it and do it yourself. I wish you success!
Decking is a commonly used roofing material that has a number of advantages. Experienced craftsmen know all the intricacies of working with him, but beginners in this field may encounter a number of problems. Laying corrugated board on the roof, the instructions for which are given below, is a rather simple process, but it is important to study it thoroughly before starting work, otherwise the roof may not be done correctly, it will start to leak over time and will not last the stated period.
Laying corrugated board on the roof - instructions
Decking, also referred to as a metal profile or profiled sheet, is a fairly thin sheet of steel that has a corrugation of an even geometric shape and is coated with polymeric protective agents. It is made by cold method on special profile bending machines. The material is intended for use in the construction of various structures. Depending on the type, it can be used for finishing walls, creating formwork when working with foundations, building fences, and also for decorating roofs.
The professional sheet differs from other roofing materials in a number of advantages. It is strong, reliable, durable, does not burn, has a rich color range and can be matched to any style of the house. This material can cover roofs of any shape - shed, having two or more slopes, and also having an unusual shape. Its installation is quite simple, and the material is convenient and practical in care.
Decking can be of various sizes. The length of one sheet varies from 2 m to 12 m, and the thickness is in the range of 0.35-1.2 mm. But, having agreed with the manufacturer, you can order sheets according to individual requirements.
Prices for corrugated board
Work requirements
For the arrangement of roofs, it is recommended to buy corrugated board with a complex polymer coating. It consists of several layers, where the lowest one is represented by galvanization and chromium, then there is a primer layer, and after that a paint and varnish polymer composition is applied. Due to such a coating, the material does not rust, but it is important to remember that when cutting a profiled sheet, this layer is damaged, therefore it is necessary to treat the cut points with protective compounds, otherwise the roof will quickly rust. Also for this reason, you need to move along the profiled sheet only in soft shoes and very carefully so as not to spoil the coating.
For roofing, corrugated board of different brands can be used, but usually it is purchased universal or wall with the marking C, H or HC. At the same time, when buying material, it is important to pay attention to the shape of the corrugation (a wave or a trapezoid is best suited for arranging a roof), its height (21-35 mm) and the thickness of the steel sheet itself.
The choice of the type of coating is greatly affected by the angle of inclination of the future roof, as well as the type and characteristics of the manufactured crate. And the length of the profiled sheet should ideally be such as to close the slope from the ridge to the eaves at once - the tightness of the roof will be higher.
As a base for corrugated board, a wooden crate can be made, while the tree must be treated with an antiseptic. You can also use a metal crate made of steel girders, but in this case the height of the corrugated part of the metal profile should not be less than 4 cm.
Be sure to take care of laying layers of hydro and sound insulation. The latter is needed in any case, especially if a residential building is covered with corrugated board, since during rain the metal coating is quite noisy. Waterproofing is required so that even with modest installation flaws or heavy rain, water does not get under the material. The vapor barrier layer will reduce the effect of condensate that forms in houses and accumulates under the roof on the corrugated board. You also need to think about the organization of ventilation of the under-roof space, otherwise the incoming moisture will not be able to be removed from under the roof.
What will be required?
For the installation of corrugated board on the roof, you will need to rent or purchase a number of tools, without some of which the work will most likely simply not work. So, you will need a screwdriver, metal shears, a hacksaw or a jigsaw, a hammer, a building level, and measuring accessories.
Of the materials, you need to buy the corrugated board itself, as well as additional elements and fasteners. Do not forget about waterproofing, insulating layers, material for the construction of battens, etc. A sealant is also purchased, which will make the joints impervious to water.
Fastening of a professional flooring is carried out by means of special self-tapping screws with rubber sealants. Their dimensions are selected depending on the height of the corrugated part of the sheet, and the number - based on the roof area to be sewn. The length of the self-tapping screw D is calculated using the following formula: D \u003d P1 + B + P2, where P1 is the thread included in the crate (about 2.5-3 cm), B is the height of the corrugated part, P2 is the thickness of the washer and seal (about 4 mm). The number of self-tapping screws per 1 m 2 is about 5-7 pcs.
Table. Dobory for a roof from a professional flooring.
Addition name | Why and how is it used |
---|---|
Required for installation along the roof eaves, performs a protective function. Individual elements are always mounted with an overlap of about 10 cm. The fasteners are made on the edge board of the crate. |
|
Its function is the design and protection of the edges of the profiled sheet. Fastened with self-tapping screws before installing corrugated sheets along the end of the roof. |
|
Closes the junction of two sheets in the ridge area. The individual planks are stacked overlapping each other. The bar protects the roof from moisture and debris getting under it through the ridge gap. |
|
Connects an inside corner between two roof slopes with different slopes. |
|
The bar protects the joints from debris and water getting between them. For example, this category includes junction strips that can form a chimney. |
|
They act as snow retainers on the roof, do not allow it to roll off it without permission. Installation is carried out at a distance of 30-40 cm from the edge of the roof. If the slope has a length of more than 8 m, then the installation of another row of snow retainers is necessary. |
Prices for popular models of screwdrivers
Screwdrivers
Laying corrugated board: instructions
Step 1. Laying corrugated board involves a series of preparatory work that will allow you to create the right roof cake and a high-quality base for the material. The waterproofing material is mounted on the previously installed rafters, starting from the bottom of the roof slope along its eaves. Laying is done with a slight sag, which will avoid tearing the coating in case of sudden temperature changes. The individual strips of material are always laid overlapping each other, the edges below the laid strips must be hidden under the edges laid above. The overlap is at least 10 cm. The joints are glued with adhesive tape. Lathing boards are mounted on top of the waterproofing film with the selected pitch.
Table. Lathing step depending on the type of material and the angle of inclination of the slope.
Profiled brand | Mounting Recommendations |
---|---|
C10 0.5 mm thick | Laying is carried out with an overlap of 2 waves if the angle of inclination is less than 15 degrees, or in 1 wave with a slope of more than 15 degrees. In the first case, the crate is solid, in the second - in increments of 30 cm |
C21 thickness 0.5-0.7 mm | An overlap of 1 corrugation, with a slope angle of less than 15 degrees, the crate pitch is 30 cm or less, if the angle is more than 15, then the pitch can reach 65 cm. |
C44 thickness 0.7-0.9 mm | The overlap of the sheets is carried out in one corrugation, and the step of the crate will be 50 cm at an angle of inclination up to 15 degrees, and more than 15 - 100 cm. |
H60 thickness 0.7-0.9 mm | This type of material is used for industrial buildings, with a slope angle of more than 8 degrees, the crate step will be 3 m. |
H75 thickness 0.7-0.9 mm | It is also recommended for use on industrial buildings with a lathing step of up to 4 m at an angle of inclination of more than 8 degrees. |
Step 2 The first sheet of corrugated board is lifted to the roof with the help of a rope and other people, and the master, who is on the roof, accepts it.
Step 3 A rail is laid on the skate across it, which will be called the control rail. When laying sheets of material from their edge and up to it, there should be 6 cm of free space.
Step 4 The first sheet of corrugated board is aligned in accordance with the end and cornice parts of the roof. If the appropriate strips are installed there, then you need to focus on their edges. The removal of the sheet should be approximately 30 cm.
Step 5 If the sheet is long enough to close the roof slope from the ridge to the eaves, then it is simply fixed in place with the help of roofing screws equipped with seals. If the dimensions of the sheet are small, then the laying will be carried out in stages: the first sheet is fixed on a self-tapping screw, the second and third are laid, also fixed. But, until the sheets are exactly aligned, fixing should be easy. Only after the final alignment, the material is securely attached to the crate with self-tapping screws.
Step 6 In this case, the sheet is enough to close the roof slope completely in width. Therefore, fixing with self-tapping screws is carried out immediately - they are screwed along the perimeter of the material into each corrugation, along the end - in increments of 50 cm. In the middle of the sheet, fixation is made into every second corrugation. In this case, the screws are screwed into the part of the sheet lying on the crate, and not into the protruding one.
Step 7 The second sheet of corrugated board rises to the roof and fits in the same way as the first, but with an overlap on the previous one in 1 wave. Fixing is done in exactly the same way.
On a note! It is best to screw the screws in a checkerboard pattern.
Step 8 Similarly, one roof slope is completely sewn up.
Step 9 In the same way, corrugated board is laid on the second side of the roof.
Step 10 The installation of the ridge bar is in progress. It is installed in its intended place - at the junction of two sheets in the area of \u200b\u200bthe ridge - and is fixed with self-tapping screws in increments of 20-30 cm. The second ridge element is laid with an overlap on the first one (the overlap should be 10 cm). Fastening is carried out on the upper crest of the roof.
Advice! Between the ridge element and the roofing sheets, experts advise laying special seals so that the roof is as tight as possible. But you should not forget about the ventilation gap.
Chimney bypass
Step 1. A metal sheet is mounted around the chimney emerging from the roof - a kind of junction bar.
Step 2 The gap between the sheet and the pipe wall is filled with sealant.
Step 3 A sheet of corrugated board is cut out in the shape of the perimeter of the chimney. Places of cuts must be treated with protective equipment.
Step 4 The cut sheet is applied in place.
Step 5 The sheet is fixed with roofing screws in the same way as ordinary sheets.
Step 6 A box is created from the profiled sheet, suitable in shape to the chimney.
Step 7 The box is put on the pipe from above.
Step 8 The box is fixed on the pipe with the help of roofing screws.
Step 9 The joint between the box and the laid profiled sheets is closed with a metal plate fixed with roofing screws.
Step 10 A small roof for a chimney is made from trimming corrugated board and fittings.
Snow guards are necessary in order to prevent avalanche snow from the roof in winter. They are mounted parallel to the roof eaves at a distance of 40-50 cm from its edge. Fastening is carried out using roofing screws. Snow guards can be mounted in one row, or two, in a checkerboard pattern.
Prices for snow guards
Snow guard
Video - Installation of corrugated roofing
As you can see, the installation of corrugated board is really simple and consists in clearly fulfilling the basic requirements for working with the material. To make a roof on their own is now within the power of every master.