Corrugated sheeting on a pitched roof: how to lay and fasten it correctly?

For roofing, corrugated sheeting is a common option because it is strong, long-lasting, and aesthetically pleasing. For a long-lasting and leak-free outcome, whether you’re building a new roof or replacing an old one, understanding how to lay and fasten corrugated sheets correctly is crucial.

This kind of roofing material is prized for being both reasonably priced and adaptable. However, correct installation is essential to maximizing its advantages. Inadequate methods can result in problems like leaks in the water supply, shortened life spans, and structural difficulties.

We’ll walk you through the steps of installing corrugated sheeting on a pitched roof in this article. We’ll go over everything you need to know to achieve a professional finish, from choosing the appropriate equipment and supplies to adhering to the right installation procedures.

Our detailed instructions and helpful hints will enable you to finish your roofing project with assurance and accuracy, regardless of your level of experience with do-it-yourself projects or roofing.

How to lay corrugated sheets: laying rules

The primary directives are the manufacturer’s suggestions and the general guidelines for roofing material installation. The guidelines state that corrugated sheets can be used to cover a roof with a slope of 12°; the ideal range is between 15° and 30°. (read about what the minimum slope angle of a pitched roof should be here).

A smaller deviation means that its joints and base need more sealing; a larger deviation means that the slope’s windage rises and that more stringent requirements for sheet thickness and fastening reliability apply.

When the slope is greater than 15, the sheathing is discharged in increments of 25 to 50 cm with medium sheet rigidity, and the height ranges from 60 to 100 cm.

When creating a diagram and installing it, several requirements must be considered:

• The corrugated sheet should be laid with a side overlap in at least one wave when the corrugation height is more than 20 mm (which is always done when using roofing grades), 2 waves – when the slope is low or the profile is weak, coupled with the absence of sealing gaskets. The top sheet overlaps the bottom by at least 10 cm on steep slopes, 15-20 on medium slopes, 20 on low slopes.
• Sheets are placed taking into account the direction of prevailing winds in the region. Ideally, the upper edge of a pitched roof is placed against the strongest flows, and the joints are placed in the direction of the remaining ones.
• The sheets are fixed using roofing screws with sealing gaskets and good corrosion protection. Fasteners pass through the material, entering the sheathing and are placed in the center, perimeter and joints.
• Sheets cover the entire area of ​​the slope with the entrance of the overhang by 35-45 mm.

Manufacturers’ primary requirement: When fastening the material to the crate, fastenies are screwed into the lower part of the profile; however, when fastening sheets to each other, they are only fastened in the upper part of the wave, sucking of a wider side edge on top of the narrow. The intended edge is decided upon and marked beforehand.

Requirements for fasteners

Special roofing screws with a length of 1.9 to 25 cm and a hat diameter of 4.8 to 6.3 mm are used to attach corrugated board.

In contrast to traditional hardware, these feature an elastic sealing gasket with a minimum thickness of 2 mm, a head coated in a polymer that complements the color of the corrugated sheet, a reinforced rod with an external triangular thread made of branded carbon steel, and a unique pointed tip shape that permits the material to be attached without compromising its anti-corrosion qualities. covering and without drilling first.

Roofing screws typically have a hexagon-shaped head, but occasionally, hardware with a spherical, semicircular, cylindrical, or even hidden top is available. When making a purchase, keep in mind that different tools are needed to fasten self-tapping screws with various head shapes.

Semicircular hardware is easier to screw in with a screwdriver; hexagonal hardware is easier to screw in with a drill equipped with a special attachment. Additionally, the precise purpose of the fasteners and the sheathing material are considered when buying corrugated sheet fasteners. Specifically:

• To attach sheets to wooden beams or porous bases, hardware with a large thread pitch (1-1.5 mm) and a pointed tip is purchased.
• To screw corrugated sheets to metal, self-tapping screws with finer threads, made from high-strength alloy steel, are used. Such hardware passes through metal up to 2.5 mm thick without preliminary preparation of holes.
• For installation of additional elements, products with increased length are purchased.

The thickness of the material, the base, and a 3 mm margin are used to determine the maximum length of products that can be used to fix sheets to the sheathing (also + wave height when selecting hardware for connecting sheets to each other). Furthermore, the fastening drill should be longer and sharper the denser the base and stiffer the grade of corrugated sheeting.

Based on the sheet installation scheme and a minimum of 8–10 pieces per sheet (from 5 pieces/m2), the quantity is determined.

Scheme of fixing corrugated sheets with self-tapping screws

The drainage groove on the profiled sheets and the slope’s magnitude are taken into consideration when choosing the order in which to lay the sheets (the less the worker moves along the fixed covering, the better).

If installing coverings with drainage grooves is necessary, a vertical scheme is thought to be the best option (the block is aligned with the eaves, the second sheet is attached on top of the first on the slope with a partial tightening of the screws, and then they are both covered with the third and fourth sheets).

In other instances, the material is arranged in three-piece blocks. One upper and two lower. Typical diagram for fasteners:

• In the bottom row, hardware is screwed into each bottom ridge.
• In the second row (with an indent to the next sheathing strip or from 30 to 50 cm when fixing the covering to a solid flooring), self-tapping screws are screwed into the second and every third lower ridge.
• In the third and subsequent ones – in the first and every third.
• When installing the top sheet, the pattern is repeated.
• When sealing and strengthening the joint, the hardware is screwed in at a distance of 10 cm from the bottom and in increments of 50 cm.

Precise procedures must be followed when installing corrugated sheeting on a pitched roof in order to guarantee weather resistance and durability. This guide will help you achieve a professional finish and long-lasting protection for your home by guiding you through the process of choosing the appropriate materials, prepping the roof, and correctly installing the sheets.

DIY installation technology

After setting up the base, supplies, and equipment (screwdriver with adjustable speed, soft shoes, mounting belts, and devices for safely lifting the coating), work can begin.

Filling the eaves strip and installing gutter support elements come before fastening in the case of an insulated pitched roof. Next, in reverse order:

1. Check the horizontal of the slope.
2. Lay the first sheet – with a downward shift of 35-40 mm or more.
3. Self-tapping screws are screwed in starting from the edges of the sheet and according to the scheme. Screwing is carried out strictly perpendicularly, but not completely, final fixation is carried out after laying and aligning adjacent elements.
4. According to the selected laying scheme, the second and subsequent profiled sheets are installed. Fastening of joints is carried out after checking the position of the entire block.
5. At the final stage, end strips are installed along the edges of the pitched roof and the areas adjoining the through elements are sealed (if any).

Common installation errors

The primary issues occur when utilizing corrugated board sheets with inadequate rigidity in an attempt to save money on fasteners and brand. Pitched roofs that are poorly fixed or that have metal fastened with self-tapping screws that have inadequate corrosion protection will tear off or distort.

Moreover, infractions consist of:

• Placing sheet joints against prevailing wind currents.
• Violation of the fastening sequence, for example, joining adjacent sheets after they are pulled to the sheathing.
• Cutting sheets with a grinder and abrasive wheels.
• Deviations from recommended overlaps.
• Walking on the material during installation without special shoes.
• Lack of sheathing under heavy additional. elements (antennas, gutters, solar panels).
• Errors in screwing screws, including screwing at an oblique angle, over-pressing or under-twisting. When screwed in correctly, the hardware rod is positioned strictly perpendicular, and the sealing layer is compressed from 2 mm to 1 mm, not otherwise.
• Raising and fixing profiled sheets during strong gusts of wind.

More tips for installing a pitched roof on a private home can be found here, and this article will teach you how to construct an extension using this style of roof.

Video on the topic

Watch this video to find out more about installing corrugated roofing:

Careful preparation and close attention to detail are necessary for the successful installation of corrugated sheeting on a pitched roof. You can guarantee a strong, weather-resistant roof that will shield your house for many years to come by taking the right precautions.

Prepare your roof structure first, and take precise measurements. To stop leaks, securely fasten the sheets, making sure they overlap appropriately. To ensure that the sheets stay securely in place, use the proper fasteners and spacing.

Remember to add the flashing and ventilation that are required to control moisture and prolong the life of your roof. Your roof will remain in excellent condition with regular maintenance and inspections helping to spot any problems early.

Following these recommendations will result in a dependable and appealing roofing solution. Have fun constructing!

Video on the topic

The first sheet on the roof, How to install it correctly. How to make an even sheet on the roof. Very simple.

don"t do that. pitched corrugated roof.flows.

correct fastening of the corrugated sheet to the wooden sheathing without shavings

Construction matters. How to correctly lay corrugated sheets on the roof of a house!

Installation of corrugated sheets (metal profiles) with your own hands. My first experience and MISTAKES during installation!.

Error in installation of corrugated sheets