Do-it-yourself roofing with a professional sheet. How to cover the roof with a professional sheet with your own hands

“How to properly cover the roof with corrugated board and is it possible to do it yourself?” - these questions are asked by every homeowner who decides to use a corrugated sheet as a roof covering for his house or outbuildings. Profiled sheet as a roofing material is a leader not only in terms of price-quality ratio, but also in ease of installation. If you act step by step and strictly follow the simple technology, then covering the roof with corrugated board will not cause any particular difficulties.

For the roof, a metal profile of the H57 or HC35 brand is chosen. H57 corrugated board with an additional stiffener, the so-called load-bearing one, is ideal as a roofing material, but a little expensive. Usually they use the universal HC35, it is suitable in terms of quality and is more affordable in terms of cost. You can choose a regular galvanized sheet, or you can choose a polymer-coated one, it all depends on your wishes and wallet. Before covering the roof with corrugated board, you need to decide on the number of sheets of material, additional elements. If the roof is simple enough, then you can do the calculation yourself. The roof slopes are rectangles, isosceles trapezoids or triangles, that is, the length of the slope is the value from the ridge to the base, add 5 cm and get the length of the metal profile sheet.
When roofing with corrugated board, it is desirable that the slope be covered in length with one sheet, since the fewer overlaps, the safer roof, but if you still have to cover in several rows, then you still need to add 20 cm for each overlap. Hence:

PROF SHEETS LENGTH \u003d Slope LENGTH + 5 cm, if the roof will be covered in one sheet.
LENGTH OF THE PROF SHEETS \u003d LENGTH of the slope + 5 cm + 20 cm (for each row with an overlap), if the roof will be covered in several horizontal rows.

The number of sheets of corrugated board is considered according to the school geometry course. The area of each slope is calculated and divided by the working area of \u200b\u200bthe profiled sheet. CALCULATION EXAMPLE: The slope is a trapezoid. Making measurements:

The roof can be covered in 2 rows of 4.3 m each - 20 cm will go to the overlap, 5 cm to the overhang, and it turns out the working LENGTH of the sheet \u003d 4.3 m-0.2 m-0.05 m \u003d 4.05 m. For each type of metal profile has its own working width, but in this example, the most common corrugated board for roofing HC35 is considered. The useful width of the HC35 metal profile sheet is 1 m, so the working area of the sheet for such a slope is 4.05 × 1 = 4.05 m2. We consider the number of sheets: 128: 4.05 \u003d 31.6, that is, you need 32 sheets of metal profiles of 4.3 m each. You can take and cover the roof with one sheet 8.15 m long, you will need 128: 8.15 \u003d 15 such sheets, 7, that is 16 sheets. But will it be convenient to work with such a length yourself ... If the roof is “broken”, with many bends, you need to scan all the slopes and count the number of sheets for each slope and add them up. You can also turn to specialists, they have special programs that will make a calculation and even a better installation scheme. Is there some more online calculators to calculate the amount of corrugated board, but before entering the data into the program, check the correctness of their calculation on a simple example, at least on the one given above. Depending on the type of roof, additional elements are also purchased, such as skates, end, cornice and butt strips, self-tapping screws for their fastening. Self-tapping screws are purchased at the rate of 11 pieces per 1m2. Thus, before covering the roof with corrugated board, you need to carry out painstaking work by measuring, counting all the materials that will be used in the work. This stage should be worked out very carefully so as not to interrupt work in the future due to a lack of some details.

standard stage. Warming and vapor barrier

A roof made of corrugated board for our climatic conditions necessarily requires insulation. The insulation technology is the same as for all other types of coating: mineral wool between the rafters and a vapor barrier layer, the insulation layer must be at least 15 cm.

Hydrobarrier

To protect from moisture thermal insulation layer and to prevent the roof from leaking, a waterproofing layer is being laid. This is a mandatory step, it cannot be neglected. Consider how to properly waterproof the roof. Under the roof with corrugated board it is better to choose modern waterproofing materials. Both membrane and polypropylene films are widely used. The technology of their laying is very simple. If the roof is new, being built from scratch, then, of course, it is better to use a membrane. The waterproofing layer is unwound over the main rafters in horizontal rows. The overlap of the upper row on the lower one should be 15 cm, the film should sag a little by 2 centimeters (but there should be a distance between the insulation layer and the waterproofing of about 3 cm) and fastened with a stapler to the rafters, the overlaps should be glued with adhesive tape.

If it is planned to simply cover the roof with corrugated board, previously covered with other material, then there is no point in using a membrane. A dense thick polyethylene film is laid on top of the old insulating layer, for example, roofing material. In any case, the waterproofing is fastened with a stapler, and the joints are glued with construction tape.

Counter-lattice and crate

After the waterproofing layer is laid, the counter-lattice is stuffed. Along the main rafters, over the hydro-barrier, bars are stuffed with gaps of 20 mm. For the counter-lattice, 25 × 40 mm bars are usually used. A crate is stuffed onto the counter-lattice. For different types of corrugated board, different types the pitch of the crate, the thinner the corrugated board and the smaller the angle of the roof slope, the smaller the pitch of the crate. This article discusses how to properly cover the roof with corrugated board, therefore, the recommended correct option for the roof is considered - the HC35 metal profile. However, in the table below we will indicate the recommended step for different types of profiled sheet.

Type of corrugated board	roof slope	Sheet thickness	Lathing step
S-8	more than 15 degrees	0.55 mm	continuous
P-18; MP-20; P-20; S-20	up to 15 degrees	0.7; 0.55 mm	continuous
P-18; MP-20; P-20; S-20	more than 15 degrees	0.7; 0.55 mm	no more than 500 mm
NS-35	up to 15 degrees	0.7; 0.55 mm	no more than 500 mm
NS-35	more than 15 degrees	0.7; 0.55 mm	no more than 1000 mm
S-44	up to 15 degrees	0.7; 0.55 mm	no more than 500 mm
S-44	more than 15 degrees	0.7; 0.55 mm	no more than 1000 mm
H-60		0.7; 0.8; 0.9 mm	no more than 3000 mm
H-75	not allowed less than 8 degrees	0.7; 0.8; 0.9 mm	no more than 4000 mm

For lathing, 30 × 40 mm slats are usually used. They begin to be stuffed in horizontal rows from the eaves to the ridge in increments of 500-1000 mm, depending on the angle of the roof. The slats are spliced only on the rafters. For all these works, galvanized nails are used. The length of the nails should be 2 times the thickness of the battens. It is advisable to make a continuous crate on the ridge and on the eaves of the roof, in the places where the pipes exit, on the valleys, it is necessary to fill additional bars, to which additional materials will be attached later for their design. Ideally, a sectional roofing scheme with corrugated board looks like this:

Laying profiled sheets

It's time to directly attach the corrugated board to the roof. Sheets are fastened only with special roofing screws with a rubber lining near the cap and a drill at the end, matching the color of the profiled sheets. For fastening, a conventional screwdriver is used. First, the eaves plank is attached.

Sheets rise to the roof along inclined boards so as not to deform them. The first sheet begins to be laid from the lower corner of the roof, the sheets are carefully aligned with the eaves. The fastening of the corrugated board to the crate is carried out in the lower wave with self-tapping screws 4.8 × 35 mm in size.

There are several schemes for laying profiled sheets, but the rules for working with profiled sheets are always the same:

The lowest row (along the eaves) and the uppermost row (along the ridge) are fastened with self-tapping screws into each wave deflection.
The middle of the slope is fixed through the wave in a checkerboard pattern.
Self-tapping screws are screwed in clearly perpendicular to the plane of the sheet, distortions are unacceptable.
The longitudinal step for fastening the sheet is 1 m.
Vertical overlaps between adjacent sheets are 1 wave (for flat roof 2 waves).
The top row lies on the bottom row with an overlap of 20 cm.
The horizontal overlap line is fastened with self-tapping screws into each lower wave.
Profiled sheets along the edges of the roof are attached to each plank of the crate.
Cutting profiled sheets is done either with an electric jigsaw or electric shears (not a grinder!).
You should move along the roof along the lower wave in soft shoes.

Since it is not so difficult to properly cover the roof with corrugated board, fixing the sheets should not take much time. After all the sheets of the metal profile are fixed, they begin to fasten the additional elements: skates, end (wind) strips, snow retainers. The ridge is fastened with self-tapping screws into every second upper wave, with an overlap on the sides of 150-200 mm.

End (wind) strips are installed with an overlap of at least 50 mm.

All additional elements are fastened with special long self-tapping screws for the metal profile - 4.8 × 50 (60) mm.

Using galvanizing for "difficult" moments

It is very convenient to cover the valleys with ordinary galvanized iron or painted metal. To do this, an ordinary sheet is bent at the angle of the valley and nailed to the crate, and corrugated board is applied on top. For decorative design of this element, in order to close the corner that does not match in color, you can install the top bar of the valley from above, matching the color scheme. To insulate the pipe, you can also use a metal sheet bent with the letter Z, the upper bend is sawn 2 cm into the pipe, the lower one is attached to the crate, and corrugated board is laid on top. To get comprehensive answers to the question: “How to cover the roof with corrugated board with your own hands” and learn some tricks, you can check out the following video tutorials.

One of the most inexpensive, durable, practical options roofing material -, or, as they say, profiled sheet, 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 makes the material 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 different thickness. 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 different technologies and materials 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 corrugated board has a relatively low price (the cheapest of the colored ones) and good performance- 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. Number of fasteners per square meter- 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 collecting truss system they nail the front board, attach hooks for installation to it, and on top of an already 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 corrugation - there is a different types profiled sheet, and there is also a universal tape, which is simply pressed in the right places.

Sealant "sit down" 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.

Can be taken corner bar with shelves dimensions 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 pass 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 a pass 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.

It is possible to qualitatively cover the roof with corrugated board even in the absence of professional construction skills. It is only important to follow the technology of work and try to avoid common mistakes that can affect the result.

The choice of corrugated board

The advantages of this material are obvious:

light weight: covering the roof with corrugated board does not require strengthening the existing truss system, building structures and foundation;
a reasonable ratio of cost and durability of the material: with proper installation, the roof can last more than 15 years;
aesthetics: corrugated board with a polymeric color coating allows you to create an attractive-looking roof;
practicality: simple galvanized sheets are an inexpensive solution for industrial buildings and outbuildings.

It is extremely important to choose a material with the necessary strength characteristics. In addition, it must be borne in mind that corrugated board with a capillary groove should be used as a roofing material, which contributes to the effective removal of rainwater when the sheets are overlapped. It is not recommended to save on material - for a cheap profiled sheet made of low-quality steel, the capillary groove is easily deformed under loads and becomes useless. Such a roof cannot be cleaned of snow without damage in winter period or repair if necessary.

Galvanized sheet is the cheapest option for roofing, but it cannot be called attractive. Professional flooring with a protective and decorative polymer coating is in high demand. It is important to determine the requirements for the strength and wear resistance of this coating. If a corrugated sheet is to be used on a roof with a high angle of inclination, then polyester-coated material can be used, since snow rolls off from such a roof under its own weight and the risk of damage to the coating during cleaning is reduced. For roofs with a lower angle of inclination, it is recommended to purchase corrugated board with a much stronger outer layer of pural or PVDF (polyvinyl difluoride), but in this case, covering the roof with corrugated board will cost more.

How to avoid material damage during shipping

The corrugated board, made of steel sheet by cold profiling, as a roofing has the necessary strength and the ability to withstand high snow and wind loads. But the sheets, individually, are largely subject to mechanical damage.

Transportation and lifting of material to the installation site should be carried out taking certain precautions to prevent accidental damage to the corrugated board.

Before covering the roof with corrugated board, the material should be delivered to the site. In this case, certain transport rules must be observed. Deformation of the roofing material during loading and unloading operations or transportation will lead to the need to replace it and, as a result, to an increase in the cost of the roof. To make a reliable roof covering, you should use a profiled sheet with a thickness of 0.5 mm or more, made of high-quality steel.

Basic transportation rules:

Such material is transported in piles laid on a solid, solid base, for example, on wooden logs, and the length of the log must exceed the width of the sheet.
When preparing for transportation, the load placed in the machine must be securely fastened with slings in order to avoid friction between the sheets and against neighboring objects - this can lead to damage protective coating.
The recommended speed of the vehicle when transporting corrugated board is no more than 80 kilometers per hour.

If the loading of profiled sheets at the place of purchase is usually carried out by professionals using special equipment, then unloading at the facility is often performed on your own manually. To properly cover the roof with corrugated board, you should carefully transfer the sheets one at a time. It is advisable to carry each sheet together.

It is strictly forbidden to bend the corrugated board or drag the sheets! It is almost impossible for a deformed sheet to return to its original geometry, and it becomes unsuitable for mounting. Damage to the protective and decorative layer leads to a rapid onset of the corrosion process during the operation of the roofing.

The rise of the corrugated board to the roof should also be done correctly. The technology of work is as follows:

do not lift the material in windy weather - this can damage it;
from the ground to the roof, it is recommended to stretch the logs along which to lift the sheets;
You can lift the corrugated board only one sheet at a time.

Considering how to properly cover the roof with corrugated board, it can be noted that two people can quickly and efficiently perform work. At the same time, lifting material to the roof is much more convenient and easier to carry out by three people. With the technology of work on the installation of the coating can be found in the thematic video.

How to avoid material damage during installation?

How to properly cover the roof with corrugated board? If you have to mount the roof of a sufficiently large area, that is, in the process of attaching the sheets you will have to walk on the already laid material, first of all you should take care of the shoes. It is required to wear shoes with soft soles that will not slip on the metal and will not damage its protective polymer layer. You can step on the roofing material only in those places where the sheet lies on the crate.

If we cover the roof with corrugated board, then you should choose the right tool for installation work. Laying this roofing material does not require the use of complex expensive equipment. It is enough to have:

screwdriver;
shears for metal, capable of cutting steel up to 0.6 mm thick;
a hacksaw for metal with small teeth;
electric scissors or electric jigsaw.

It is not recommended to use electric welding or gas welding when installing corrugated board, as in this case there is a high probability of damage to the protective coating of the sheets.

To avoid corrosion at the cut points of corrugated board sheets, it is advisable to immediately treat the ends of the material with an anti-corrosion primer.

Features of fastening corrugated board

In the question of how to cover the roof with corrugated board Special attention attached to fasteners. To securely attach the sheets to the crate, it is best to use galvanized self-tapping screws with a drill at the end. The size of the fasteners is 4.8 × 35 mm. Each self-tapping screw must be equipped with a special neoprene gasket that protects the attachment point from moisture. Self-tapping screws must be screwed into the wave in its lower part, adjacent to the crate. When fastening the ridge, the self-tapping screw is screwed through the top of the wave. Manufacturers of corrugated board often offer self-tapping screws with hats painted in the color of the selected roofing material, which increases the aesthetics of the finished roof.

To create a reliable and durable roof, you first need to decide what material to make it from.

Of the many roofing materials on the market, corrugated board is very popular today.

It is made of galvanized steel sheets in the form of a ribbed profile coated with a colored polymer composition. Its main advantage is that you can cover the roof with corrugated board yourself. How to cover the roof with corrugated board correctly with your own hands?

How to choose a professional sheet correctly?

Before starting work, you need to know exactly which brand of profiled sheet is best to cover the roof. The profiled sheet has a marking corresponding to its strength and purpose. As a roof, profiled sheets can be used, having symbols from C-8 to H-158, which indicate the shape of the profile and the wave pitch. More precisely, the sheets are selected depending on the roof structure, while being guided by the rule, the greater the slope angle, the lower the grade. A guide to selecting roof characteristics is included with the roofing kit sold.

With it, you can determine the installation step of the crate, and determine exactly how to properly cover the roof. It follows from general rule: the higher the number of profiled sheets, the less often the step of the bars. The length, width and thickness of the sheets is selected individually in each case. However, when choosing a size, one should be guided by the rule: the roof covering will be ideal if the length of the sheet completely covers the roof slope and its overhang. To ensure the necessary strength of the roof, it is advisable to use boards measuring 32x100 mm as a crate.

To perform such work, you need a certain set of tools and overalls.

To properly cover the roof with corrugated board, you must prepare the following tools in advance:

electric screwdriver;
mallet and hammer;
electric drill;
wire cutters;
staple gun;
rivet tongs;
gun for applying sealant;
cutting metal shears;
tape measure and marker;
cord;
template for installing the crate.

It is impossible to cut roofing material with a grinder. The corrugated board is cut only with mechanical or electric scissors. The edges of the cut sheets are covered with enamel for metal or special mastic.

Due to the presence of very sharp edges in the material, to prevent injury, it is possible to work with it only with thick gloves.

To cover the roof with corrugated board with your own hands, you need to prepare shoes with soft soles so as not to damage the surface of the material. In the process of work, one should walk on the roof, stepping into the deflections of the sheet where there is a crate under it.

Back to index

Drawing up a sketch of the roof and a list of components

Before starting work, it is necessary to make a sketch of the roof indicating the dimensions of the roof and draw up a list of necessary components. It should indicate the slope of the roof, it is necessary that it corresponds to the planned pitch of the crate. It is easiest to design a simple gable roof. It is better to plan the size of the roof so that it is a multiple of the size of the sheets of corrugated board, then it will not be necessary to cut the sheets. For all additional elements of the roof (chimneys, ventilation shafts) it is required to provide and purchase additional parts.

It is better to order the material and components in one place so that it is of the same manufacturer and of the same color. At the same time, you can order the cutting of sheets in accordance with the dimensions indicated on the drawing. Request a guarantee for coverage.

Back to index

Stage of preparatory work

To cover the roof with corrugated board, a number of preparatory work is required:

to lay a vapor barrier film, for which:

The sheet of film must be rolled out along the rafters.
It is necessary to lay it with an overlap of panels of about 20 cm.
The film sheet should cover the wall completely and overlap its borders.
The joints of the canvases are fastened with adhesive tape.
The film should lie with a sag of about 2 cm.
After laying the vapor barrier film, a counter-lattice is stuffed along the rafters - bars measuring 20x50mm.

crate device;

Places for installing the crate are marked in advance. In this case, it is required to observe the step between the bars in accordance with the places of fastening of the sheets and the angle of the slope of the roof slope.
The crate is attached to the counter-crate and rafters in accordance with the markup;
Prior to installation, the material of the counter-lattice and the batten should be impregnated with an antiseptic and flame retardant before installation.

Of the roofing materials, one of the leaders is the profiled sheet. In another way, it is called corrugated board - a building material made of galvanized steel with a simple installation technology. However, no matter how elementary the laying of this material is, it is carried out according to strict rules.

Features of the installation of a roofing profiled sheet

A profiled sheet is a special material that is made by passing a metal sheet through a special machine that forms a profile with a height of 8 mm to 7.5 cm.

As a result of processing, the metal sheet becomes wavy rectangular or trapezoidal. And this means that it acquires high strength, which allows it to withstand mechanical stress and the influence of natural phenomena.

The profiled sheet can withstand significant loads, therefore it is used as a roofing material.

Since the material is specific, its laying technology is not as simple as it first seems. The most difficult moments in the installation of a roofing profiled sheet are considered to be its delivery to the roof, the search for suitable tools and fasteners, as well as the construction of the crate.

Roofing cake for profiled sheets

When assembling roofing cake under the corrugated board, you must perform the following steps:

When laying a roofing cake, it is important to adhere to the recommended layer layout with the obligatory arrangement of ventilation gaps

Video: steps for creating a roof from a profiled sheet

Transportation of corrugated board

To deliver the corrugated board to the roof construction site, you should be extremely careful. Therefore, profiled sheets are strongly recommended to be carried one at a time, and in four hands.

The professional sheet cannot be dragged along the ground and bent. metal material with a changed shape cannot be returned to its previous state, which means that it must be disposed of as a raw material with a damaged protective layer that has lost its ability to resist corrosion.

Lifting corrugated board to the roof is also a responsible task, carried out according to strict rules:

Suitable fasteners

Reliable adhesion of profiled sheets to the crate can only be ensured by galvanized self-tapping screws with a drill at the end. The size of these fasteners strictly regulated: length - 3.5 cm, and diameter - 4.8 mm. To block moisture from entering the roofing pie, self-tapping screws must be equipped with a neoprene gasket.

It is strictly forbidden to fix profiled sheets on the crate with nails or aluminum rivets. Such fasteners will be powerless if a strong wind suddenly acts on the roofing material.

Self-tapping screws are fixed at the bottom of the wave, achieving a strong connection with the laths of the crate

The place of fastening of the screws on the profiled sheet is the lower part of the wave in contact with the crate.

To fix the corrugated board, you can choose self-tapping screws with hats, the color of which repeats the color of the purchased roofing. This approach will help to make the roof aesthetically attractive.

If it is decided to cover the roof with polymer-coated corrugated board, then one must be prepared for careful control of the process of immersing self-tapping screws into the material. The chips coming out from under the screwed-in fastener must not be allowed to scratch the protective layer of the profiled sheet.

The resulting chips must be carefully removed at the same time. Being left in the area where the self-tapping screw passes through the material, it will become covered with rust and spread the “disease” to neighboring areas. In addition, the chips will prevent clogging of the attachment point with a special gasket.

The self-tapping screw must be screwed into the material strictly perpendicular

Laying depending on the slope of the roof

The slope of the roof is at least 12 degrees. And the degree of inclination of the roof depends on how exactly you need to put profiled sheets on the roof:

a roof slope of up to 15 ° requires covering the roof in such a way that nearby sheets are connected by 20 cm edges;
a steeper roof - with a slope of up to 30 ° - is closed with pieces of material that are in contact by 15–20 cm;
it is customary to cover a roof inclined by more than 30 ° with an overlap of 10–15 cm.

The seams formed after connecting the profiled sheets are carefully covered. To do this, use mastic or sealing tape.

The slope of the roof is reflected in the step of the crate. With a small slope of the roof slopes, the base for the roofing material is constructed, leaving between its rows from 30 to 40 cm. When the roof is tilted by more than 15 °, they act differently: the sheathing boards are laid out at a distance of 50 or even 60 cm from each other.

Installation of profiled sheets on the roof

Roofing work begins with a thorough preparation - the search for tools, material and additional elements.

Assembly tools

To fix the corrugated board to the roof, the following tools are needed:

screwdriver;
scissors for metal (for steel up to 0.6 mm thick);
hacksaw for metal with small teeth;
electric jigsaw;
electric saw;
marker;
level;
yardstick;
sealant gun.

You can cut the profiled sheet with scissors for metal or hand saw, but by no means Bulgarian

When installing profiled sheets, it is forbidden to work with electric or gas welding. The use of this equipment will lead to disastrous consequences - damage to the protective layer of the material.

Cut sections of corrugated board sheets can be insured against rust damage. To do this, lubricate the edges of the material with an anti-corrosion compound.

Material and additional elements

Light roofing with a small slope is preferable to cover with profiled sheets C35 or C44. The shape of this material can be trapezoidal or sinusoidal. And the length of such sheets varies between two and six meters, although some manufacturers, if they received individual order, make a professional flooring from 50 cm to 12 m in size.

The roof with steep slopes is strongly advised by the craftsmen to be covered with profiled sheets of the HC35 brand.

Profiled sheet HC35 belongs to the group of load-bearing profiles and has increased rigidity and corrosion resistance

In addition to corrugated board, you will need to stock up on a semicircular or rectangular ridge, which is necessary to protect the joints of profiled sheets. In addition to the ridge in the shape of a half circle, you must purchase special plugs.

The ridge is used to protect and decorate the junction area of two roof slopes

Another necessary detail is the wind bar. Without it, raindrops will fall on the walls of the house, and the roof will not be able to look like structures brought to the final stage of construction.

The wind bar acts as a protective and decorative element roofs

Based on the configuration of the roof, some other additional elements may be needed:

the lower and upper levels of the valleys (the first blocks moisture from entering the space under the roof, and the second makes the roof a well-designed object);
outer and inner corners connecting the sheets in the corner area.

Step-by-step instruction

The installation direction of the corrugated board is from the bottom up, because in this situation, rain or melt water will not seep into the area between the sheets.

The corrugated material is supposed to be laid against the direction of the wind, most often observed in the roof construction area. It turns out that if the wind blows from the right, then the profiled sheets are attached from left to right.

Installation of profiled sheets is carried out in the direction against the wind and from the bottom up

When the profiled sheet is so long that it covers the entire slope, installation is started from the end of the roof. The roofing sheet is aligned along the cornice, keeping in mind that 4 cm is left for the margin (cornice overhang). Aligning the roofing material along the edge of the end is strictly prohibited.

Laying profiled sheets on the roof is performed in the following sequence:

The first profile is installed on the crate and fixed in the middle with one self-tapping screw. The next sheet is placed next to it, the edge of which should overlap the edge of the previous one. The second profile is also fixed in the central part.
The first sheets of material are fixed with one self-tapping screw.
Having laid out a line of sheets from one to the other edge of the roof, horizontal alignment of the row is carried out. At the same time, they are guided by the cornice.
Profiled sheets are linked to each other. Fastening is performed in the area near the ridge and in every third deflection of the material crest.
In the ridge area, the sheet is attached through one deflection, in the junction with the bottom sheet - in each deflection, and in the middle - through two spans
The corrugated board is finally attached to the base. Self-tapping screws are screwed in at the location of the crate where the third deflection is located for all profiled sheets. From the end part of the roof, the profiles are fixed in the areas of contact with the crate through one deflection. The upper edge of the sheet located near the ridge is pressed to the base also through the deflection of the wave.
Excess material is disposed of using a hacksaw. This task must be performed from the ends of the house and on the second slope of the roof.
The roof is equipped with an end plate, fixed in the corrugated board wave by means of self-tapping screws. The element is fixed from below, moving towards the roof ridge. If it is necessary to join two planks, they make a large overlap - more than 5 cm. In this case, fastening is performed every 60–100 cm.
The end strips are installed with a large overlap and are attached to the crate with self-tapping screws.
A sealant is hidden between the roof ridge and profiled sheets, which independently adheres to the installation site. Ridge strips are increased by connecting their edges by 10 cm. Fasteners are inserted in increments of 30 cm.

Video: how to avoid mistakes when installing profiled sheets

Roof repair

One of the following troubles can happen with a corrugated roof: leakage followed by corrosion, damage in the form of holes only in some places of the roofing, and global damage to the sheets.

Fixing a roof leak

Having discovered that the roof, covered with profiled sheets, is leaking, it is necessary to conduct a thorough inspection of the fasteners. Perhaps they were loosely inserted into the material, so the special gasket on them could not prevent water from seeping into the layers of the roofing cake.

If the problem of a leaking roof manifested itself a few months after the construction of the roof, then the ways to solve it are quite simple. You just need to climb to the roof and tighten the screws more tightly.

Sometimes the cause of a leaking roof is poor tightening of the screws.

When the adjustment of the fasteners turned out to be useless, they are looking for another way out of the situation. It happens that to prevent the roof from leaking, you have to resort to such work as:

replacement of some sections of roofing;
reconstruction of the roof screed or installation of a new one;
dismantling of old aprons on cornices and junctions to roof structures.

Finding small cracks and scratches on the roofing, be sure to take a means to block them. To eliminate deep wrinkles on the material, mastic is used.

Mastic is able to get rid of small cracks on the roof

Rust on roofing profiled sheets also needs to be fought, because it indicates damage to the protective layer of the material. Areas with corrosion spots must be cleaned and then treated with a primer. The final stage of this procedure is the application of bituminous varnish or aluminum powder, which can form a new protective film on the corrugated board.

Repair of slightly damaged sheets

An assistant in resolving the issue of repairing the roof will be a composition of minium, if only minor damage is detected on the corrugated board. And if holes are found, profiled sheets will have to be saved with tow, treated in advance with heated bitumen. Bituminous mastic is poured onto the area where the gap has just been clogged with the mentioned agent.

Large holes are eliminated with pieces of roofing material or burlap. The patch is cut out 25 cm wider than the hole found. First of all, dirt is removed from the damaged area with a brush with metal bristles, then the surface is treated with heated bituminous mastic and dried for several hours.

If burlap served as the material for the patch, then mastic is applied to the surface before gluing it.

You can eliminate small leaks with a piece of burlap glued to the mastic

The patch can be applied in two layers if the hole in the profiled sheet looks large. A piece of material laid on a hole is lubricated with heated mastic.

"Resuscitation" of the roof with a patch of roofing felt or burlap is ideal for sheets with slots up to 20 cm wide.

When the holes in the corrugated board are even larger, the patches are made from sheet metal, which does not have to be new. A metal piece is attached with nails to the crate, thereby protecting it from sagging.

Overhaul

In some cases, you should not count on the help of special compositions and patches. It happens that a damaged sheet needs to be completely replaced.

Dismantling the damaged roofing sheeting is a task that will require a lot of effort. Still, along with leaky sheets, you will have to replace the old heat-insulating material.

The worst happens: sometimes, when repairing a roof, they are forced to change everything, right down to the rafters and grooves. Such a decision can only be made after a thorough inspection of the roofing pie.

Overhaul of the roof from corrugated board involves the dismantling of old sheets and a thorough examination of the layers of the roof

The waterproofing film is removed, and a new one is laid in its place if holes are also found in it. When detected in the roof wooden elements with rot, “sick” areas are cut off and lubricated with an antiseptic composition.

Noticing that the elimination of damp wood has greatly reduced the thickness of the rafters or any other wooden part, they resort to building up or installing a new element.

Video: how to repair the roof yourself

Installation of roofing corrugated board and its repair will require mastering many intricacies of construction work. However, this does not mean that the task is difficult. For the most part, she's just responsible.

home » Mounting » Do-it-yourself roofing with a professional sheet. How to cover the roof with a professional sheet with your own hands