Rules for fastening corrugated sheeting with self-tapping screws on the roof - selection of fasteners and installation rules. Fastening corrugated sheeting when installing roofing coverings and installing the main components How to properly attach corrugated sheeting to the roof

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Corrugated sheeting can hardly be called an elegant or presentable coating; in these parameters it is significantly inferior to other roofing materials. However, bathhouse owners often prefer corrugated sheeting as an inexpensive and durable coating. Plus, you can choose a coating with a shade that best suits the overall style of the building.

Corrugated sheets are corrugated steel sheets. The corrugation profile is trapezoidal, providing the material with the necessary rigidity.

When choosing a roofing sheet, consider the height of the wave. The larger it is, the higher the mechanical strength of the roofing material. But there is also a downside to the coin: the higher the wave height, the higher the risk of moisture seeping in the holes for hardware due to increased water pressure.

You should not choose corrugated sheeting with a wave height of less than 20 mm for the roof of a bathhouse. This material cannot withstand snow loads and is deformed if it is moved directly over the roofing during the roof repair process.

Prices for roofing corrugated sheets

roofing sheeting

Which corrugated sheet to choose for a bath?

The data from the table is used to determine the required number of roofing sheets. To calculate you need:

• specify the length of one side of the roof and the useful width of the sheets used;
• divide the length by the useful (working) width of the sheet;
• Round the result up to the nearest whole number.

*Calculation for rectangular slopes.

• the length of the slope is 6 meters, and the working width of the sheet of grade S-8 is 1150 mm;
• convert meters to millimeters, 6 m = 6000 mm;
• divide 6000 by 1150, we get 5.21;
• round to the nearest whole number, we get 6. This is exactly how many sheets of corrugated sheets will be needed for one roof slope, if the length of the corrugated sheet corresponds to the width of the slope.

It is recommended to give preference to corrugated sheets with a length no less than the width of the roof slope. Then, when installing the roof, there will be fewer transverse joints, and the waterproof properties of the roofing will be improved.

Note! The durability of a bathhouse roof directly depends not only on the quality of the corrugated sheets themselves and additional elements for them, but also on the correct installation of the entire system.

Additional elements: what to include in the estimate besides roofing material

To build a pitched roof for a bathhouse you may need:

• lathing materials;
• waterproofing materials (films, membranes);
• materials for roof insulation (if necessary) and vapor barrier;
• under-roof ventilation system;
• skylights, if provided for by the project;
• roofing penetrations (for the chimney, sewer and ventilation outlets);
• safety devices such as snow guards, ladders for roof repair/maintenance;
• materials for filing cornice and gable overhangs;
• strips: cornice, wind, abutments, valleys, ridge (plus ridge aero element). The length of the slats for most manufacturers is 2 and 3 meters;
• ventilation tape to protect the ventilation gap on the eaves from debris, insects and birds;
• drainage system.

On a note! It is worth purchasing repair paint along with the roofing material. It is useful for touching up minor scratches and abrasions.

Prices for repair paint

repair paint

Transportation and unloading: what to pay attention to

Profiled sheets are transported in vehicles that have the ability to top load the material. In this case, the dimensions of the trailer or body must be at least 20 cm larger than the dimensions of the roofing material. Packages with sheets are secured along their entire length and transported at a speed not exceeding 80 km/h.

When accepting the material, it is necessary to check the actual number of packages and make sure there is no damage or defects.

Unloading of corrugated sheets is carried out using lifting equipment with soft slings or traverses if the length of the sheets is more than 5000 mm. If you plan to unload sheets manually, then at least two workers should do this. When transferring sheets, it is important not to allow them to bend significantly and keep the material vertical.

Important! Don't forget to use work gloves.

After unloading, the sheets are laid horizontally. It is not recommended to store directly on the ground; it is advisable that there be a gap of 50-100 mm between the metal and the ground surface (you can use 50x150 mm boards, laid out in 50 cm increments).

Corrugated sheets with protective film can be stored for no more than one month, and with original packaging for no more than six months, provided that the material is protected from sunlight, heavy objects are not placed on top of it, and welding or other work is not carried out nearby, during which there may be the corrugated sheet covering is damaged. If long-term storage of corrugated sheeting is planned, it is unpacked, transferred to an unheated dry room and stacked in stacks up to 70 cm high, with rows of sheets laid with identical slats).

Important! Be careful: when the original packaging is removed, there is a risk of sheets being moved by strong gusts of wind.

Sheathing for corrugated sheets: installation rules

The lathing can be sparse or continuous. In bathhouses, the roof sheathing is traditionally wooden, made of edged boards or OSB-3. The choice of the type of sheathing is not spontaneous, but depends on the slope of the slopes and the selected sheet profile.

For sparse lathing with a pitch of less than 600 mm, it is recommended to use an edged board with a section of 100x25 mm.

Calculator for calculating materials for sparse lathing

Reflections on the topic of how to attach corrugated sheets to the roof are relevant not only when completely replacing the roof. This material allows for partial renovation of the roof of a house; it is characterized by good maintainability and long-term quality.

Corrugated sheeting for the roof of my house - material characteristics

Country, country house and other individual construction cannot be classified as cheap pleasures. The use of modern profiled sheets allows you to significantly save on the important repair stage - roofing work. This savings concerns both the cost of the material itself and the possibility of installing it yourself. Compared to metal tiles, profiled sheets are 2-3 times cheaper, while coverings made from natural tiles will cost even more. In addition to financial advantages, factory-made sheet metal roofing materials have other advantages:

• Low weight per unit of usable area, the minimum among existing materials. This quality allows the use of load-bearing rafters of a smaller cross-section than in the case of a massive roof - that is, the savings will concern the entire roof;
• Long lasting corrosion resistance. A typical profiled sheet is a multi-layer structure where the steel is only the basis for the overall strength. Polymer and zinc coatings, mechanical and chemical resistant varnishes and spraying are applied to the steel;
• Large selection of color options. The finishing layer of polymer can generally be made of any color - the catalogs of leading manufacturers of profiled sheets have a full-scale rainbow look. Please note that corrugated sheets in dark colors (brown, stained oak, etc.) tend to quickly fade under sunlight. It is better to opt for standard shades of red, brick, blue or silver. Then you won’t have to think about how to properly attach corrugated sheeting to the roof every few years, due to the loss of the original richness of color;
• Simplicity and ease of installation work due to the low weight of the sheets and the ability to “smooth out” unevenness of the roofing frame. Other materials for roofs require greater geometric rigor of the rafters being built, floors between floors and other supporting structures.

Profiled sheets also have characteristic disadvantages as a roofing material. Firstly, there is a risk of damage to the zinc-polymer layers during unloading, transportation or installation. Even a slight chip of the protective coating will lead to rapid corrosion of the steel base under the influence of precipitation or simply from dampness. The damaged element will have to be replaced - and for this you will need to disassemble almost the entire roof; installation of corrugated sheets is carried out with a reliable overlap of the sheets on each other.

Secondly, compensation for the low cost of corrugated sheets is the so-called “drum effect”. In heavy rain, the sound of drops falling on the roof is amplified by the vibration of the sheets and can resonate with their vibrations. As a result, people on the upper floors feel as if they have been placed inside a huge drum for the duration of the festival procession - and the muscular drummers spare no effort in demonstrating their percussive skills...

The “drum effect” is compensated by insulating the roof and creating an acoustic barrier of porous materials between the rafters and the roof. But the sound comfort of natural tiles for any sheet of profiled metal remains unattainable - perhaps to a greater extent than for a state employee an exotic carnival in tropical latitudes.

The site’s site masters have prepared a special calculator for you. You can easily calculate the required amount of roofing.

Areas of application of profiled sheets…

...not limited to roofing work. Metal sheeting can be used for the following renovation projects:

• Cladding of ventilated facades as a replacement for expensive siding on the back sides of walls, for utility buildings, etc.;
• Arrangement of solid fences made of corrugated sheets as a budget method of combating malicious attempts and curious glances;
• Creation of walls in lightly loaded structures (greenhouses, booths, poultry houses, etc.).

Before learning how to attach corrugated sheets to the roof, you can conduct a repair “experiment in miniature” by finishing with corrugated sheets yourself canopy over the door. All basic installation techniques must be used for such a small structure; mastering them will significantly help with full-scale roofing work.

How to attach corrugated sheeting to the roof - step-by-step installation instructions

A reliable and durable metal roofing must undergo several repair stages in its arrangement:

How to attach corrugated sheeting to the roof - step-by-step diagram

Step 1: Rafter frame

Rafters for profiled sheets must have a certain degree of slope, at least 8°. In practice, this angle corresponds to a rise of 1 meter with a linear roof length of 7 meters

The greater the roof slope, the less requirements for sealing the joints between the sheets. If the roof is sloping (less than 8°), it is wiser to call professional roofers - it is very difficult to achieve tightness on your own at a small slope angle.

If the house already has a rafter frame, all damaged and questionable boards should be replaced, and the insulation and soundproofing of the roof should be completed. All movements on the roof should be thought out in advance, footrests should be provided, a mounting belt should be used, etc. – all the roofs in the world are not worth a traumatic fall.

Step 2: Rigging

Installing corrugated sheets on a reliable rafter system is easier than lifting the material into the work area. If the installation itself is quite capable of one worker, then for the rigging stage you will need an assistant, or better yet two. It is most convenient to lift corrugated sheets onto the rafters in packs of 5-10 sheets, and this must be done carefully. Damage to the coating will lead to rapid development of crevice corrosion in the metal. You can secure stacks of sheets using individual bars or several slats.

Step 3: Start installation

Roofing with profiled sheets always starts from the bottom up, from the overhang to the ridge, from the visible end. A thin membrane is first attached to protect the thermal insulation layers from condensation. It is best to choose a diffusion type membrane; it is nailed to the rafter sheathing with nails with wide and flat heads. The approximate gap between the nails is 20-25 cm, make sure that their heads fit completely into the wood.

The first row of sheets is laid with an overhang of 30-50 cm above the roof overhang; the specific size depends on the roof drainage system and the presence of drainage at the foundation. Even before attaching the corrugated sheet to the roof, you need to decide on the size of the overlap. Between adjacent panels it is performed for at least one full wave. If the wave of corrugated sheeting is small (up to 20 mm), and the roof is flat, the overlap between the sheets must be made into two waves. Don’t be afraid of overuse of material; reliability and moisture resistance are more important.

The joints between the sheet flooring must be sealed, and it is better to use a special tape rather than a hardening sealant. Then, if necessary, it will be possible to disassemble the roof and replace individual sheets. The corrugated sheeting is fastened to the rafter frame using self-tapping screws with sealing washers, in the amount of 6-10 screws per square meter of material. First, mark a hole on the sheet with a dowel, then drill it with a drill, and then screw in a screw.

Step 4: Continue installation

Adjacent rows of profiled sheets are offset in height by, on average, half their end size. They cut the sheets with a sharp hacksaw for metal, and on the ground - cutting on shaky rafters is unsafe. The overlap between rows is limited by the roof slope. On a flat roof the overlap is greater (up to 30 cm), on a steep slope (more than 20°) 10 cm is sufficient. Careful sealing of horizontal joints with the same tape is required. Screws for such joints are screwed into each recess of the deflection, that is, “through the wave.” If the rubber washer protrudes from under the head of the screw by 1-2 mm evenly over the entire diameter, it means that it is tightened well, not loosely and without “tightening”.

Step 5: Complete the installation

Upon reaching the ridge of the roof, a crucial stage begins - water and other precipitation tend to pour from above. Having laid the last sheets, a wide end strip is mounted on top of them. It is fastened in increments of no more than 30 cm, maintaining an overlap of 10 cm between the slats themselves to drain water. Before installation, each end strip is carefully inspected for the integrity of the coating - leakage from the roof ridge is diagnosed with great difficulty and can appear at a great distance from the defective element. The last to be installed are the eaves and ridge strips for the design of the new roof.

Roofing corrugated sheeting is a building material made of sheet metal. Its cross-section has a wave shape of symmetrical ridges (corrugations) of a trapezoidal or rounded appearance, giving lightness and strength to the structure.

The low part of the profile is often called the sole or bottom flange, and the upper part is called the ridge or top flange.

They are made from cold-rolled metal 0.3-1 mm thick with various protective coatings.

In this article we will look at how to properly screw onto the roof and how many roofing screws are required per 1 m2 of corrugated sheeting.

Roofing is considered to be corrugated sheeting that has:

• thickness metal not less than 0.7 mm;
• height corrugations of at least 35 mm;
• available resistant coating solar radiation, precipitation and mechanical damage;

NS35 and NS44 corrugated sheets are used for roofing residential buildings. But in those regions where a large amount of snow falls in winter, H60 or H75 is recommended - their side walls of the wave crest are reinforced with an additional stiffening rib, and in the middle of the shelf there is a longitudinal gutter for draining melt water.

Unlike metal tiles, corrugated sheets have a uniform profile along the entire length of the section and can be laid on a pitched roof with a small slope angle - 6-11°.

• at height profile 35 mm(HC35) and inclination angle up to 15º – up to 0.5 m, more than 15º – 1 m;
• at height profile 60 mm(H60) and inclination angle from 8º – no more than 3 m;
• at height profile 70 mm(H75) and inclination angle from 8º – no more than 4 m;

NOTE!

Between sheathing and waterproofing there must be a ventilation gap. To create it, a counter-lattice is installed from rafter strips or metal purlins attached along the rafters.

What screws are used to secure corrugated sheeting to the roof?

Self-tapping screws for corrugated roofing are made of high-carbon steel and coated with high-quality galvanization. They are equipped with a special high-strength washer and plastic gasket (EPDM), isolating the edges of the hole from water ingress and contact with the screw head. The screw head itself has a wide hexagonal head with a metric size of M8.

When installing the roof use three types of screws with a diameter of 4.8 mm, differing in their purpose:

• for mounting in the bottom shelf(bottom) of the corrugated sheet profile to the sheathing 35 mm long with a thinner tip in the form of a narrowed drill and a wide thread pitch;
• for fastening sheets on the top shelf of the comb 20 mm long with a wide drill-shaped tip and a fine thread pitch;
• for fastening ridge strips– length from 50 to 80 mm.

Self-tapping screws for roofing

Consumption of roofing screws per 1 m2 of corrugated sheeting

Usually fastening is done in increments of 0.5 m. For sheet sizes 8 for 1.1 meters per square meter there will be 4 screws. But the lower edge of the first row of roofing and the overlap area of ​​subsequent rows are recommended to be attached to each lower flange of the profile.

It is recommended to fasten the edges of the sheets facing the roof gables at intervals of 200-300 mm. Side overlaps, end strips and ridge strips also increase the amount of fasteners required.

On average, 8 self-tapping screws of all sizes are consumed per 1 m² of corrugated roofing sheeting. Approximately four of them are 35 mm long, two are 20 mm, and two more are 50 mm or more. These values ​​should not be used as final values, since many self-tapping screws are rejected during the installation process.

A more accurate calculation depends on the overall dimensions of the sheet, the angle of inclination of the roof, the thickness of the metal, as well as the number of roof slopes.

How to properly attach corrugated sheeting to the roof with self-tapping screws

A properly tightened self-tapping screw will not deform the pressure washer in the opposite direction, but at the same time tightly presses the gasket to the metal, leaving no gaps or cracks. The axis of rotation of the screw must be strictly perpendicular to the metal surface. So, let's take a closer look at how to attach corrugated sheeting to the roof with self-tapping screws:

• How to attach it to the roof sheathing? Attaching the first sheet of corrugated board to the sheathing begins on the left side of the bottom row. It is made with an overhang of 4 cm above the edge of the roof and an allowance of 15 cm for the next row. Fastening at the bottom of the sheet should be done “through the wave”– in each lower flange (sole) of the profile in contact with the sheathing – the strength of the entire roof structure depends on this. To prevent skew, the sheets should be carefully aligned with the cornice.
• The next sheet is laid with a side overlap in one wave(for low-profile sheets - in two waves) onto the previous sheet, so that the edge passes and is fastened with short screws with a pitch of 300 mm along the crest of the wave (this prevents water from flowing in). It is also recommended to tightly join the sheets into the bottom flange of the top sheet by tightening the fasteners with a deviation of 50 mm in the direction of the overlap.
• The middle part of the sheet is fixed in a checkerboard pattern with a step of two waves, which corresponds to 500 mm.

Laying corrugated sheets

CAREFULLY!

Self-tapping screws must be tightened strictly at right angles to the surface. Excessive force when twisting can lead to deformation and peeling of the protective coating of the corrugated sheet. It is best to use special screwdrivers for this operation.

1. The second and subsequent rows are laid with an overlap of 10-20 cm on the previous one. Self-tapping screws in the overlap area are also twisted through one wave. When determining the width of the overlap zone, it should be taken into account that the higher the roof ridge and the larger the ridge, the less overlap is made.
2. The upper edge of the last row of sheets adjacent to the roof ridge is secured through a wave.
3. At the second stage, the end and wind strips, chimney aprons, etc. are fixed. In this case, they are fastened with self-tapping screws 50-90 mm long and a fastening pitch of up to 300 mm. If the end strip consists of several additional elements (which is extremely undesirable), then an overlap of 100 mm must be observed.
4. The final stage is the installation of the roof ridge. The ridge is a specially shaped profile with two shoulders 100-300 mm wide. Its purpose is to protect the roof from moisture entering the under-roof space and to provide additional structural rigidity.
5. It is necessary to ensure that the mating edges of the roof slopes have a height difference of no more than 2%. A larger value leads to deformation under the influence of wind and the weight of snow and the formation of cracks.

Sheet fastening

Laying the ridge begins from the end, opposite to the prevailing wind. The overlap of the additional elements is made the same as that of the end strips. Rain and melt water gets under the ridge through the gaps of the lower shelves of the corrugated sheet.

Therefore, special sealing gaskets are placed under the shoulders of the ridge, repeating the shape of the profile. Self-tapping screws up to 80 mm long twist along the lower edge of the skate shoulder with a margin of 3-4 cm through the upper shelves(crests) waves of corrugated board into the sheathing.

Attaching the wind bar

It is applied on top of the final rows of sheets using the “through the wave” method. fasten with ridge screws up to 80 mm long to the sheathing through the upper shelves VKontakte

Thanks to such a universal material as corrugated sheeting, you can quickly and easily create a roof covering, façade structure or fencing. But before you start working with this material, you need to learn how to properly attach corrugated sheeting, select the appropriate fasteners and find out the main nuances of working with the material. Let's look at how to attach corrugated sheets to various surfaces.

Corrugated sheeting is a material that can be safely called universal. It is used in a wide variety of construction operations. Corrugated sheeting is used with equal success for the construction of canopies and light pavilions, the construction of fences and various enclosing structures.

Corrugated sheeting is also suitable for laying on the roof, for covering walls and constructing floors. Of course, for each of the listed operations, a specific brand of corrugated sheeting with the appropriate characteristics must be selected.

Fastening methods

The method of fastening the corrugated sheeting is selected depending on which design option is being installed.

Using self-tapping screws

In most cases, fastening of corrugated sheets is carried out using self-tapping screws. Usually a special type of screw is used - roofing screws equipped with elastic gaskets. The presence of this gasket ensures the waterproofness of the assembled structure, since the elastic material, pressed by the fixed screw, reliably seals the fastener hole.

When fastening corrugated sheets with roofing screws, it is very important to screw in the screws correctly. Firstly, the axis of the screw must be strictly perpendicular to the surface of the coating. Secondly, the screw must be tightened to such a level that the gasket under the head is slightly compressed.

If the degree of screwing is insufficient, the gasket does not fit tightly to the surface, and if the screw is “pinched,” the overcompressed gasket will be severely deformed. All of the above errors will lead to the mounting location being leaky.

Advice! When installing structures made of corrugated sheets, a screwdriver is usually used. To facilitate the work process, it is recommended to install a torque limiter on the tool using the selection method. But even in this case, the master must visually control the degree of screwing in of each screw.

Rivets

Another acceptable fastening option is combined rivets. They are installed using a special gun. When working with corrugated sheets, it is recommended to use steel rivets, but aluminum rivets are not suitable for this work, since they do not provide sufficient fastener strength.

Prohibited fastening methods

When working with corrugated sheets, it is prohibited to use nails. This fastening option does not provide sufficient strength. For example, if you nail sheets of corrugated sheets to the roof sheathing, then such a covering will not withstand even moderate winds.

It is prohibited to use all methods of thermal welding to fasten corrugated sheets. The fact is that when the material is heated, the polymer layer covering the material melts, as well as the protective zinc layer burns out. As a result, a material lacking anti-corrosion protection is very quickly destroyed due to corrosion.

Description of fasteners

The main fastening element that is used when performing installation work with corrugated sheets is a self-tapping screw.

Advice! To fasten the corrugated sheets, special self-tapping screws are used, made from a special grade of carbon steel - C1022. To ensure greater stability of the products, a zinc coating is applied to the screws; its thickness can vary between 12.5-15 microns.

To avoid the need to make holes in the corrugated sheet for installing screws, during installation it is recommended to use hardware whose tip is a drill. Such self-tapping screws may have a semicircular or hexagonal head, which is painted or coated with a layer of colored polymer. By selecting self-tapping screws with heads that match the color of the corrugated sheeting, you can make the attachment points on the covering unnoticeable.

Advice! Special self-tapping screws with colored heads and a drill at the end of the thread are marked with the letter “M”.

Self-tapping screws for installing corrugated sheets usually have a soft elastic gasket to seal the holes formed during screwing. But sometimes it is necessary to use screws with tin spacers, for example, when fastening ridge elements to the roof.

How is corrugated sheeting fastened when installing different structures?

Let's look at how corrugated sheets are fastened when laying the material on the roof and when installing fences.

How is the material attached to the roof?

To securely secure the corrugated sheeting to the roof, it is necessary to build a sheathing. During housing construction, the sheathing is usually assembled from wood. When constructing industrial facilities, the frame for laying corrugated sheets can be assembled from metal elements.

The spacing of the elements during the construction of the sheathing is determined depending on the type of corrugated sheeting used, namely, on the height of the profiling sheets, as well as on the slope of the roof slopes.

After the sheathing is ready, you will need to make a preliminary layout of the foxes. It must be remembered that the sheets must be laid with an overlap. Moreover, the width of the overlap depends on how steep the slopes of the roof are.

After completing the preliminary marking, you can proceed directly to fastening the sheets. Here are the basic rules for doing this work:

• Self-tapping screws should be screwed in only in places where the profile is lowered, that is, where the material fits most tightly to the sheathing.

• At the top and bottom of the sheet, it is necessary to screw self-tapping screws into each profile depression.
• When fastening sheets on the long sides, it is necessary to screw in self-tapping screws in increments of 50 cm.
• Self-tapping screws are screwed into the sheet area, allowing one wave to pass through. The screws are alternated in a checkerboard pattern.
• To ensure that the coating is as even as possible, it is not recommended to attach the sheets to the sheathing one at a time. First you need to assemble a block consisting of 3-4 sheets fastened together, and only then screw the block to the sheathing.
• How to collect blocks? To do this, a starting sheet is laid and after it is aligned with the ends, it is secured with one self-tapping screw, screwing it into the top of the sheet. Then the next sheet is placed next to it, laying it overlapping. After leveling, the sheets are connected to each other using short self-tapping screws or steel rivets. Similarly, one or two more sheets are attached to the block. Next, the block is leveled and secured to the sheathing.

How should corrugated sheets be secured when constructing fences?

• When constructing fences, a frame is first assembled onto which the corrugated sheeting will be attached. The frame is assembled from supports, which are installed in pits and concreted. Transverse logs are attached to fixed supports, which are placed in two or three rows.

• Before you start attaching the corrugated sheet to the frame, you will need to measure the assembled structure to make sure that there are no distortions.
• Begin to attach the corrugated sheet from the end part, screwing in self-tapping screws in increments of 50 cm.
• When constructing fences, sheets are usually installed with an overlap of one wave width.
• If necessary, protruding parts of the corrugated sheeting can be cut using a hacksaw or metal scissors. It is not recommended to use a tool with abrasive discs (grinder) since the cutting process destroys the protective layers and rusty spots will soon appear on the assembled fence.
• The ends of the sheets and the corner joints of the fence are closed by installing special strips. The planks are matched to the color of the corrugated sheet and secured with self-tapping screws.

So, correct fastening of the corrugated sheeting during assembly is a guarantee that the assembled structure will serve for a long time, delighting the owners with its reliability and attractive appearance.

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 a wall option with a wave height 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:

• Fastening to metal purlins 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. The fasteners 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 incorrect methods of fastening, 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 control 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 corrugated sheeting is attached to a roof with a slight slope 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;

• 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.

You need to attach corrugated sheeting to a roof made of metal trusses in exactly the same way, the only difference is that the screws should protrude from the metal on the reverse side by 7-8 mm. This ensures reliable fastening of the material to the surface.

Conclusion

From the article you learned about the best option for 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.