It's difficult to overestimate. Today, this fastener is a well-thought-out element that is adapted to all the nuances of this type of work. This type of hardware must be selected correctly. This is the only way you can achieve a positive result. The material used for the manufacture of self-tapping screws is carbon steel grade C1022. Fasteners are manufactured according to state standards. According to them, the surface of the self-tapping screw must have a zinc coating in order for the product to have anti-corrosion properties.

Reliability of fasteners

It should be taken into account that fastening corrugated sheets at joints can undergo high loads. This should include snow, wind and operational impacts. That is why each batch of self-tapping screws undergoes tensile testing. Optimal value is considered 102 kg/cm. But on sale you can find self-tapping screws in which this parameter varies within higher limits: from 150 to 170 kg/cm.

Selection of self-tapping screws for corrugated sheets

If you plan to install screws on the roof, then it is important to choose these elements correctly. They can be intended for installation on wooden or metal frame. In the first case, the fastening should be selected taking into account the rare It will guarantee ease of use and the strength of the fastening. This belief is true even if you have to work with the hardest types of wood.

If the profiled sheet will be installed on metal structure which is subject to increased pressure during operation, you should choose self-tapping screws that have a special sharpening and a drilling tip. These products should be based on high-quality steel. When arranging the roof, it is necessary to install additional and ridge elements. In this case, you should purchase a longer self-tapping screw.

Why else should you choose a self-tapping screw?

All three varieties provide a special tip in the form of a drill. Thanks to it, there is no need to make holes in the roofing material in advance. But hexagon-shaped heads will allow you to secure the element in the chuck of a screwdriver or drill. This simplifies the workflow and reduces time consumption, positively influencing the quality of installation.

Determining the number of screws per sheet of corrugated sheeting

If you are fastening corrugated sheeting with self-tapping screws on the roof, then you need to start work from the side eaves overhang. The first sheet is placed in bottom row. And the second one is mounted with an overlap in one wave. After aligning the canvases along the edge of the cornice, the profile is fixed to the lower beam of the sheathing in each wave. Where the sheets overlap, they should be joined. This is done using rivets. After installing the first two bottom sheets with an overlap whose width is 200 mm, you can proceed to installing the left one in the second row. But that's not all.

In the place of overlap, the sheets must be fixed to the sheathing in each wave. In between, the canvases are fixed in checkerboard pattern. The fasteners must be installed through two waves. For reliable fixation, the distance between the screws should not exceed 500 mm. The above technology determines how many parts are needed per sheet. Based on this, a calculation should be performed. If you use a sheet 8 m long, the width of which is 1.1 m, and the distance between the fasteners is 500 mm, then you need to spend 10 screws for the profile in the bottom and upper parts. Eight pieces will be needed to fix the middle part of the sheet. From this we can conclude that the consumption of fasteners per corrugated sheet will be 18 pieces. This figure will need to be multiplied by the number of sheets on the roof. This will allow you to obtain the number of screws that will be necessary to attach the sheets. Everything, as you see, is simple.

When corrugated sheeting is fastened with self-tapping screws on the roof, the number of elements may vary. This will depend on the width and length of the sheet. If we're talking about On significant slopes, the distance between the locations of screws must be reduced. This will increase consumption by 1 m2. When fixing the material, it is recommended to pay the greatest attention to the joints of the coating. It is in these locations that leaks are likely. At the ends, in those places where there are gable overhangs, the sheet must be strengthened to each batten of the sheathing. This will also increase the number of screws. Therefore, after making calculations, it is necessary to purchase 10% more fasteners, since there is a possibility of defects and unforeseen expenses, as well as breakage of parts and their loss.

Correct fastening technology

Fastening corrugated sheeting with self-tapping screws on the roof should be carried out according to a certain method. It involves the use of colored or galvanized elements with polypropylene washers. The diameter can vary from 0.48 to 0.63 cm. While the length usually varies from 1.9 to 25 cm. It is important to consider when purchasing a self-tapping screw that the threaded part must be 3 mm longer than the width of the materials being joined.

Average consumption per square meter coatings are usually about 7 pieces. To securely fasten a profiled sheet on a straight section, you will need an average of 8 parts, while closer to the ends the number should be increased so that the structure can withstand wind loads. Screws must be screwed in strictly perpendicularly. In this case, distortions are completely unacceptable. Experts recommend screwing the fasteners into the waves that are adjacent to the sheathing or purlins. When fixing corrugated sheeting with self-tapping screws on the roof, it is recommended to review the photo in advance. This will allow you to understand that at the first stage the material is laid out in a strict position and order. It is important to ensure overlap, which should be greater with a smaller inclined angle.

Important nuances

If you are attaching corrugated sheeting to the roof, the distance between the screws must be taken into account. It was discussed above. But the technology also requires compliance with many other rules. Among them, we should highlight the need to control the force when tightening fasteners manually. Otherwise the coating may be damaged. If you do not tighten the screw, the roof will not perform its functions. When laying sheets of corrugated sheets, it is necessary to gradually move upward. In this case, the canvases of the first row should hang 5 cm above the edge of the roof. This will protect the walls of the building from rain and melt water.

Quite often, home craftsmen independently attach corrugated sheets to the roof with self-tapping screws. The instructions will help even those who have been doing similar work for some time. From it you can find out that the installation of the sheet is carried out using fasteners with rubber gaskets. They provide waterproofness and absolute tightness. Steel rivets are also used for joints. But it is recommended to avoid aluminum ones. After all, they are not able to ensure the installation strength at the proper level.

In order to fasten the sheets together, it is not recommended to use welding. After all, when high temperatures oh polymer and zinc protective coating will burn out. The sheet itself then remains without protection from corrosion. Fastening with 21 self-tapping screws on the roof is the surest solution. The use of nails is strictly not recommended.

Restrictions

If there is more to work with, then the overlap strip should be wider. This is worth considering. If we are talking about a roof whose slope angle exceeds 10 degrees, then an overlap of one wave will be sufficient. There is another option. If the angle of inclination is even greater, then it is necessary to make an overlap, the width of which is two or three waves. It is necessary to start moving during installation from the end parts, and not from the middle. It is important not only the step of fastening the corrugated sheeting with self-tapping screws on the roof, which was discussed above, but also the correct location of the sheets. They should go along the roof. Even a slight tilt is not acceptable. To control the arrangement of elements on the surface, you can pull the thread, adhering to the laying line in the first row of corrugated sheeting.

Conclusion

The method of attaching corrugated sheets described above is considered the most optimal. A gable roof, the number of screws for which you can calculate using the method used in the article, will look attractive if you do everything according to the rules. The use of this type of fastener cannot be called accidental. This mechanism ensures maximum reliability of the connection between the material and the sheathing. Among other things, the self-tapping screws have special gaskets that prevent moisture from getting inside. They also allow you to make the connection softer. Correct fastening corrugated sheeting on the roof with self-tapping screws eliminates damage to the sheet.

Construction of a fence from corrugated board requires certain skills and experience. If we divide the process of installing a fence from corrugated sheets into several stages, the most difficult of them include the construction of foundations and the installation of fence posts. The subsequent steps are much easier to complete.

If the fence posts have already been installed, and the foundations of the fence have gained the necessary strength, you can begin installing horizontal purlins (they are also called logs) for attaching the profiled metal sheet.

The number of rows of horizontal purlins is determined by the height of the fence. After all, the higher the height of the fence, the greater wind load it will have to endure during operation. For a fence with a height of 1.6-1.8 m, it is enough to install logs in two rows; for a higher height, three rows of purlins are already required.

How to attach a corrugated sheet to a fence with self-tapping screws - in places where there is an overlap, the screws are screwed into each wave

Installation of purlins must be carried out strictly horizontally. Therefore, when installing them it is necessary to use water or laser level. The only difficulty in installing joists is that it is better to attach them to the fence supports using electric welding.

How to screw corrugated sheeting onto a fence?

After installing the horizontal purlins, you can begin attaching the corrugated sheet to the fence. Before attaching the corrugated sheets to the fence, it is necessary to mark the installation of the profiled sheets.

To do this, at a height of 10-15 cm from the ground level, a thin nylon cord is pulled strictly horizontally between the fence posts. This height is enough so that minor unevenness in the soil does not interfere with the installation of corrugated sheeting.

It is best to use the fasteners for a fence made of corrugated sheets that are used when installing roofing coverings made of corrugated sheets. Roofing screws are made of especially strong steel grade C1022. Their surface has a reliable zinc protective coating with a thickness of at least 12.5 microns.

Fasteners for a fence made of corrugated sheets - roofing screw

In addition, roofing fasteners for metal profiled sheets differ from conventional metal screws with a press washer in the presence of a special sealing gasket made of neoprene rubber. This gasket is necessary to create a tight seal at the junction of the roofing covering and the sheathing rafter system.

When installing a fence, such tightness at the point where the profile is attached to the guides is not necessary. But moisture getting under the head of the screw can cause premature corrosion of the edges of the hole in the corrugated sheet.

This can lead to streaks of rust appearing on the surface of the fence. Even when using roofing screws with rubber washers, it is recommended to process the edges of the holes in the corrugated sheet by special means, preventing edge corrosion.

In addition, unlike conventional metal screws, the heads of roofing screws are painted in the same colors as polymer-coated corrugated sheets. This makes them completely invisible against the background of the fence.

It is best to install corrugated sheets together. While one person holds the bottom edge of the profiled sheet at the level of the tensioned cord, the second person uses a screwdriver to secure it to the purlin in the upper corner. After checking the horizontality, the corrugated sheeting is fixed in two or three more places.

Before attaching the corrugated sheet to the fence over the entire area, an adjacent sheet of corrugated sheeting is installed. It is better to mount it in the same way as roof covering- with an overlap in one wave. This will allow you to more accurately align the sheet vertically.

The requirements for how to attach corrugated sheeting to a fence are the same as for attaching any vertical surfaces made of corrugated sheets. Self-tapping screws are installed through one wave.

Fastening corrugated sheeting to a fence - installation diagram of self-tapping screws with overlap

Despite the fact that the tip in the form of a drill allows you to screw them in without first drilling holes in the corrugated sheet, it is better not to abuse this. The fact is that a hole in a profiled sheet, the diameter of which is slightly larger than the diameter of the screw, allows you to compensate for the linear expansion of the metal during sudden temperature fluctuations.

The corrugated sheeting must be secured with self-tapping screws (to metal surfaces or a wooden frame) and rivets (sheet to sheet).

To install a profiled sheet, in most cases a frame is made. The structure is made of metal profiled pipe (square, rectangle), wooden slats, plasterboard profile, regular corner. Sometimes they make wall cladding by mounting the sheets directly to the brick or stone.

How and with what in each specific case to fix the corrugated sheet?

Self-tapping screws (self-tapping) for metal with a metal washer and rubber seal

A self-tapping screw (commonly a self-tapping screw) is made in the form of a rod with a tip resembling a drill, a triangular thread and a head for a wrench or a screwdriver. In addition to screws with a drill tip, screws with a sharp tip are produced. To fasten the corrugated sheet, complete with a screw, use a press washer and a rubber sealing gasket.

We apply:

• for attaching corrugated sheets to metal surfaces;
• with steel thickness up to 12.5 mm;
• without pre-drilling holes;
• for installation, for cladding facades, gables, making gates, wickets, etc.

We do not use:

• for fastening sheets to tool and high-carbon steels;
• for binding metal profiled sheets together;
• for fastening to wooden structures;
• for fastening to metal less than 1 mm thick.

How do we determine quality?

When purchasing, we require a quality certificate that reflects the characteristics according to the DIN standard, including:

For fastening to a frame with a thickness of 2.32 mm, we use products for drill No. 1, with a diameter of 4.8 mm, pitch 2.12. For metal 5.5 mm drill No. 3, 8.5 mm - No. 4, 12.5 mm - No. 5. Thread pitch 1.8. Self-tapping screws large diameters must be coated with zinc with a thickness of at least 12 microns.

We select the length of the self-tapping screws depending on the purpose. To attach the profiled sheet to the lower wave, choose a size larger than the materials being joined by 3mm. When screwed into the upper wave, for example, to attach skates, the length increases by the height of the profile.

The industry produces 3 types of self-tapping screws according to the shape of the head:

• hexagonal;
• cruciform;
• anti-vandal.

For conventional installation It is easier to work with a hexagonal head shape. We use anti-vandal screws for fences and cladding, the removal of which outside will provide free access to the premises or territory. Installation of products is done with a special tool.

Important nuances when attaching corrugated sheets with self-tapping screws:

1. We tighten the screws with a washer and a rubber gasket strictly perpendicular to the plane of the sheet.
2. According to the characteristics, the screws are suggested to be screwed in at 2500 rpm, but it is difficult to calculate the force by touch. Tighten the screws so as not to squeeze the rubber washer. A flattened seal will crack over time and will not create a tight seal.
3. We don't use rubber seals where monolithic fastening is required.
4. In places where unauthorized access to fasteners is possible, we use anti-vandal screws or use self-tapping screws with a notch that prevents arbitrary unscrewing.

How to attach profiled sheets to a wooden frame?

For roofs mounted on wooden sheathing, there is no alternative to traditional metal screws. Selecting screws with largest step thread. The larger this parameter, the more reliable the mount.

Vertically located profiled sheets that do not require a hermetic fastening, in order to save money, are fastened with galvanized self-tapping screws with a monolithic press washer. In everyday life it is an ordinary self-tapping screw with a wide head. For screwing, a Phillips screwdriver is inserted into the screwdriver.

If the sheathing is made of DVL, chipboard, etc., we use screws with double-threaded threads. For the roof, we make a set of washers and cuffs ourselves, selecting the diameter of the screw.

1. Use standard wood screws, including those intended for fastening plasterboard sheets. This fastener has a countersunk head and, when screwed in, will damage the surface of the corrugated sheet.
2. Use screws with a drill tip. The wood does not require drilling, a sharp self-tapping screw is screwed in more reliably, and the passage through corrugated sheets makes it acceptable for a large amount of work.

Is it possible to attach corrugated sheeting to shell rock (limestone, brick)?

We mount the sheets directly to the wall made of stone or brick using dowels and anchors. To install, pre-drill holes in the metal. We select fastener heads with a monolithic wide washer. The shape of a plastic insert with a shimmer that acts as a seal. We make the hole in the corrugated sheet 0.5 mm larger than the diameter of the insert.

1. For quick installation use dowels with impact screws. They differ from traditional screws and screws in the shape of the thread. Disadvantage: if struck, the surface of the sheet can be damaged.
2. Do not attach sheets to surfaces with protrusions or uneven surfaces.

How to connect sheets of profiled metal to each other?

The standard thickness of profiled iron is 0.4 mm. It is unreliable to connect two sheets using self-tapping screws, for example at an overlap, since the fastening is fragile and depends on the thread pitch.

To solve the problem we use rivets. The fastener consists of two parts, which are made of aluminum. Rivets are installed in pre-prepared holes and do not require access to the reverse side. For installation we use a rivet device. In places where hidden installation of rivets is required, we use a hole punch ( special pliers holders that pierce the corrugated sheet from the end of the wave).

Rivets can be used as fasteners for installing roofing, fence cladding, etc. The disadvantage is labor intensity. A through hole must be drilled for each rivet.

Other methods of installing corrugated sheets

Screw and bolt connection

The corrugated sheet is attached to metal surfaces with screws, for example, when used as casings on machines, for fastening to special steels. We drill holes in the sheet and the base on which installation is taking place, cut the threads and install.

A bolted connection is used in a similar way, but fastening requires drilling through holes both in the sheet and in the material to which the installation is taking place. Bolts are used to connect corrugated sheets to metal and wooden frames, preventing vandalism and unauthorized access.

Adhesive base

For interior cladding smooth walls Profiled sheets can be installed with glue. As a binding element, use metal putty mixed with PVA glue. The sheets are pressed to the base and kept until the adhesive composition is plasticized. In this version, corrugated sheeting does not perform load-bearing functions, but serves for decorative purposes.
We have you and a set of screws for it.

One of the most inexpensive, durable, practical options roofing material- or, as they also say, a profiled sheet, a metal profile. This is a sheet of metal that is covered with several protective layers, and is then passed through a molding machine, which presses ridges and grooves into it to give it greater rigidity. The material turns out to be quite light; a roof made of corrugated sheets can be installed independently and even “with one hand.” The technology is not the most complicated, it is quite possible to do it yourself.

Types of corrugated sheets

There are different types corrugated sheets There is a regular profiled sheet - galvanized, and there is a colored one - with a layer of polymer applied over the zinc coating. The polymer coating has a dual role - it both protects from external influences and gives the material a more decorative appearance. appearance. Simple galvanized corrugated sheeting is used as a roofing material mainly on temporary buildings, while colored sheeting has a quite solid appearance and can be seen on the roofs of residential buildings and courtyard buildings.

By purpose

Corrugated sheets are made from sheet metal different thickness. The thinnest ones are intended for decorating walls, but can be laid on the roof with frequent lathing and light snow loads. The sheets of this group are marked with the letter “C”.

The thickest metal is used to make material with increased bearing capacity. It is marked with the letter “N” and is used as a roofing material in areas with high wind or snow loads. There is also a universal profiled sheet - it is designated “NS”. Can be used both for walls and for roofing (the amount of snow should be average).

After the letter coding of the profiled sheet there are numbers: C8, H35, NS20. They indicate the height of the wave in millimeters that is formed in this material. In the example, these are 8 mm, 35 mm, 20 mm, respectively. Corrugated sheeting with a wave height of at least 20 mm is laid on the roof.

The wave shape of the supporting metal profile is often more complex - additional grooves are added to it to increase rigidity.

By type of coverage

Despite all the external similarities, the price of corrugated sheeting of the same type can differ significantly. The point, most often, is not the arrogance of the manufacturer or seller, but the different technologies and materials used in production. For example, the protective coating can be zinc or zinc-alumina. 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 durability of the coating is also affected by the method of wave formation. There are two technologies - cold rolling and emulsion. During cold rolling, the sheet is simply pressed through rollers without any preparation. To avoid damaging the previously applied coating, expensive equipment is required. Accordingly, cold rolled corrugated sheets are more expensive.

When forming a wave with an emulsion, the metal surface is moistened with a liquid (oil, water, special liquid) and then sent under rolls. If, after rolling, such a sheet is not dried, but sent to a kiln to fix the paint, then the places that were wet will quickly begin to rust. It is impossible to see this defect in advance; you have to hope that the technology is not broken. But profiled sheets made using this technology are cheaper.

There are also different polymer coatings. They create films of different thicknesses and densities, with different properties.

• Polyester (glossy and matte). Profiled sheets coated with polyester have a relatively low price (the cheapest of the colored ones) and good characteristics- the coating is plastic, long time does not change its color. Matte polyester has no glare on the surface, it looks like velvety. This is achieved using a different application technique and a thicker layer. This coating is the most resistant to mechanical damage.
• Plastisol. Has increased durability to aggressive environments, but does not tolerate ultraviolet radiation. A roof made of corrugated sheets coated with plastisol will quickly fade (two to three years).
• Pural - polyamide and acrylic are added to polyurethane. The coating is more uniform, and the service life without changing color is ten years. The disadvantage is the high price.
• PVDF is a composition of polyvinyl fluoride and acrylic. The coating is expensive, but lasts a long time even in an aggressive environment. This roofing material can be used on sea coasts. Another great property is that it can clean itself. The slightest rain, and the roof made of corrugated sheets with PVDF coating shines like new.

Under normal conditions, the roof is made of corrugated sheets coated with polyester. In terms of price-quality ratio, it is optimal.

How to lay corrugated sheets on a roof

The corrugated roofing is laid on a finished sheathing of boards, in which the fragments are located parallel to the roof overhang. The sheathing installation step is up to 60 cm. They usually use an inch edged board, 25 mm thick. The sheets are laid one after another with vertical overlap in one wave. When laying corrugated sheets on the roof, please note that the outermost shelves have different lengths. The one that is a little shorter should be on the bottom, the one that is a little longer should cover the short one. In this case, they adjoin one another tightly, without a gap. If you mix it up and do the opposite, a gap of several millimeters will form between the two shelves, into which water will flow. Therefore, be careful when installing.

About the amount of horizontal overlap. If there are more than one rows of corrugated sheets on the roof, the sheets are laid with overlap. The amount by which top sheet overlaps the lower one, depends on the angle of the roof slope: the flatter the roof, the more approach is necessary.

Most factories that produce corrugated sheets can offer you to make sheets that will cover your entire roof - from ridge to eaves - in one long sheet ( maximum length 12 meters). This creates certain difficulties during installation - such sheets are difficult to lift and lay. It will especially take a long time to expose the first sheet - it must be placed strictly vertically, which is a difficult task at altitude. But the main advantage of this solution is a continuous coating from top to bottom, which significantly increases the degree of protection of the attic space from moisture penetration, negating all the inconveniences. After all, there are no horizontal joints, which means there are no problems with wicking either.

How to properly attach corrugated sheeting to the roof

To fasten the corrugated sheets, use special self-tapping screws with rubber gaskets under the caps. They ensure the tightness of the connection. Such self-tapping screws are usually painted the same tone as the roofing material. The amount of fasteners per square meter is 5-7 pieces (do not forget to add about 20% for fastening the ridge element, securing joints and other similar work).

Install self-tapping screws into the bottom flange, where the sheet comes into contact with the sheathing. Their length is 20-25 mm, depending on the thickness of the sheathing board, 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 there that may 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 pierce the double layer of metal. For these purposes, fasteners goes longer- 40 mm and more (depending on the height of the wave) - the screw must go into the sheathing board.

What to cut

It is very rare that corrugated sheeting is installed on a roof without trimming - these are simply unique cases. How to cut profiled sheets? Metal scissors or jigsaw. Yes, it’s slow and not entirely convenient, but that’s what the manufacturers advise. You cannot use an angle grinder (grinder) - when cutting with it, the sheet heats up to very high temperatures at the cut site, which leads to the evaporation of zinc. As a result, in this place, the material quickly begins to rust.

Installation procedure

After assembling the rafter system, they nail the front board, hooks are attached to it for installation, and on top of this there is a special strip - a drip edge, onto which the edge is then placed waterproofing film. 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 sheets depends on whether you are going to attic space make it cold or warm. If the attic is cold, the sequence of actions is as follows:

If you insulate the roof, the order of work and the amount of materials required will change. There will be more layers:

Corrugated roofing: components

Even with a conventional gable roof There are several complex sections that usually form at the junction of different planes and/or parts of the system. These areas are usually called “nodes”. We examined one such unit in the previous paragraph - the design of the front board and the fastening of gutters. But this is far from the only node where detailed explanation is required.

Installation and sealing of the ridge

The under-roof space under the corrugated sheeting must be well ventilated. This material heats up quickly and cools down just as quickly, which promotes the formation of condensation. Therefore, when installing a metal profile on the roof, in the upper part the sheets on both sides are not joined tightly, but leave a gap of several centimeters - so that the air can freely escape, taking with it water vapor.

If there are special skates with ventilation (in the photo), but even if you just install a regular ridge element between the profiled sheet and its edge, it turns out large number holes - in each depression of the corrugation. The size of this gap depends on the height of the wave - the higher the wave, the larger the gaps are. 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, which are formed by the sheathing), to the cracks in the ridge. This is how ventilation and moisture regulation of the insulation occurs, condensation evaporates and is carried away.

Large gaps are good for ventilation, but when it rains/snows with the wind, precipitation clogs them, and dust and leaves get into the attic through them. It is much worse if the holes become clogged with leaves - ventilation will immediately deteriorate. To avoid getting into a similar situation, previously approximately 2/3 of the gap height 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. This solution is also incorrect from the point of view of ventilation - the gap decreases and air movement worsens. But there was no other solution. Now it is there - a sealant for corrugated sheets. It is made from polyurethane foam, polyethylene or wood composite. The structure of these materials is porous and allows air to pass through well, 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 in the right places just snuggles.

The seal “sits” on the sealant, double sided tape, glue, there are options with self-adhesive tape. With this compaction, air passes freely, and precipitation remains in the outer layers, from where it later evaporates.

Finishing the overhang with corrugated sheets

In order to cover the overhang with corrugated sheets, a special profile is attached to the front board. A profiled sheet cut into strips of the required width is inserted into its groove. The second edge of the hem is attached to a board nailed to the ends of the rafters. The joint between 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 placed on it.

If a drainage system is to be attached, then the hooks for the gutters are nailed after installing the lower drip line. The top dropper is nailed after installing all the hooks.

Connecting corrugated sheeting to the wall

In some cases, a roof made of metal profiles is adjacent to the wall of a structure. How to make a connection so that there are no leaks? There are two options (see picture). Both use a corner strip, only this one has different size and different profile.

You can take a corner strip with shelf dimensions of 150*200 mm. A shorter side is placed on the wall, a longer side is placed on 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 it is brick and building blocks). The joint between the planks and the wall is silicone sealant. From the roof side, the plank is attached to the crest of the wave, installing special self-tapping screws with rubber washers. Their length is determined in the same way as when connecting adjacent sheets of corrugated sheets (wave height + 20 mm for entering the sheathing board).

The second option is more labor-intensive: a groove (groove) is made in the wall, into which a corner strip with shelves bent at 45° is inserted. The fastening in this case is similar, the difference is in the size 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. The cross-section of pipes is round and rectangular; each type has its own solution.

To pass round pipes There are special steel or polymer aprons through the roofing material. Their upper part is made in the form of a cone, the lower part - the skirt - is made of elastic material that can take a given shape. The apron is placed tightly on the pipe and lowered so that the “skirt” rests on the roofing material. Next, you need to give the elastic skirt a corrugated shape. Use a hammer for this (regular or rubber - depends on the type of apron). To prevent water from flowing under the skirt, coat the joint with sealant and press it well.

After securing the skirt, fix the neckline. If the apron is metal, cover the top with a clamp, tighten it, and coat the joint with sealant. When using a polymer apron (master flush), it is put on the pipe with considerable effort (sometimes you even need to lubricate the pipe with soapy water), but the joint, nevertheless, is sealed with sealant for reliability.

With a rectangular (brick) pipe, everything is somewhat more complicated. Elements are cut out of metal sheets to cover the joint with the roofing pie.

The article is devoted to the reliability and durability of the roof, which directly depend on the method of fixing the roofing material. Fastening corrugated sheets to the roof has its own characteristics, which must be studied before starting work. I will tell you about the technical nuances so that you can fix the material yourself and not worry about the final result.

Process Features

We will analyze the process in great detail and break it down into the following stages:

• Selection of fasteners depending on the roof configuration;
• Fastening elements.

Stage 1 – selection of profiled sheets and fasteners

The type of fastener directly depends on the choice of profiled sheet, so first of all decide on this aspect:

• The simplest option is marked “C”, this is wall option with wave heights from 8 to 44 mm. It is distinguished by its low price, but it is not very suitable for roofs. I recommend using such products for sheds and small buildings;

• The NS brand is suitable for both walls and roofing systems. Their corrugation height usually ranges from 35 to 44 mm, but there are options with a lower wave. This is the so-called “golden mean”, which I recommend using on houses and other buildings;

• The most durable option is marked “H” and has a wave from 57 to 114 mm. Such sheets are always made with stiffeners, but due to their high profile they are most suitable for industrial buildings.

You need to take into account the slope of your roof; the size of the overlaps at the joints depends on this.

Three main options:

• If the angle of inclination is less than 14 degrees, then the overlap at the joints must be at least 200 mm. Plus, it is recommended to additionally protect the connections with sealant;

• To tilt the slope from 15 to 30 degrees, an overlap of 15-20 cm is required without additional sealing of the joints;
• If the angle is more than 30 degrees, then the overlap can be 10-15 cm.

Another factor influencing the choice of fasteners is the design of the sheathing.

And here there are two options:

• TO metal purlins fastening is done using special metal screws with a large drill tip. Their length must be at least 25 mm for the main fastening and 70 mm for gable and ridge elements. Fastening elements must be the same color as the main coating, everything is easy here, because the material is marked RAL;

• Attaching the corrugated sheet to the wooden sheathing is done using self-tapping screws with a smaller drill. Typically, fasteners with a length of 29 or 35 mm are used to fasten the main elements, and the 70 mm option is used for skates and planks.

Stage 2 - fastening process

If everything you need is at hand, then you can get to work.

Let's figure out how to attach corrugated sheets to the roof:

You need to work with a good screwdriver, for which you can purchase an M8 magnetic attachment. With its help, fastening will be very convenient.

• It is important to place the first sheet correctly. Firstly, it needs to be leveled, and secondly, the overhang must be set, it should be no more than 10-15 cm. You also need to figure out how to correctly place the self-tapping screw; the diagram below shows the correct and wrong ways fastenings, it is very important to immediately understand this aspect;

• It is important to understand that the corrugated sheet is always attached to the lower part of the wave. You don't need to twist over the top of the waves, as you can deform the material if you don't pay attention to the twisting force. During the work process, it is important to ensure the correct position of the screwdriver; it should be positioned perpendicular to avoid distortions;

As for the consumption of fasteners, it usually takes 6-8 pieces per square meter. Fastening is usually done through a wave. The vertical distance between the fasteners depends on the pitch of the sheathing and is 40-50 cm.

• Remember that fastening corrugated sheeting on a roof with a slight slope is done using sealant at the joints. You can retreat 3-4 centimeters from the edge of the sheet in the upper part. If the elements are joined lengthwise, then the overlap should be at least 100 mm, and preferably 150-200 mm;

• Work continues until the entire surface is covered. If your roof profile is broken, that is, the angle of inclination changes, then you need to pay attention to connecting the sheets. The top element must be bent so that it extends 30-40 cm beyond the bend, and the next sheet must be placed under it. This is the only way to ensure reliable docking;

• After the corrugated sheet is secured, you can begin installing the end strips. They must extend to the surface by at least 100 mm. Fastening is done in increments of 30-50 cm, the length of the self-tapping screw must be such that it fits into the frame by at least 30 mm. I usually use the 70mm option to be sure;

This is how the gable elements are attached

• Lastly, the ridge is attached. I recommend using this technology: a special vapor barrier tape is glued along the edges along the line of the element, which will close the joint, but will not interfere with normal air exchange. Roofing screws are screwed along the edge in increments of approximately 20 cm.

Attach corrugated sheeting to the roof from metal trusses you need exactly the same, the only difference is that the screws should come out of the metal from the back side by 7-8 mm. This ensures reliable fastening of the material to the surface.

Conclusion

From the article you learned about best option fastening corrugated sheets using roofing screws. This review will give you the opportunity to do the job correctly and get the perfect result. The video in this article will help you understand the topic even better, and if you don’t understand anything, write your questions in the comments below.