Self-tapping screws for a roof from a professional flooring

The roof from a professional flooring enjoys wide popularity in private low-rise construction recently, as it has light weight, the long term of operation, the high bearing ability and reasonable price. However, reading reviews about this material, you can see the negative views of homeowners. Experienced roofing masters claim that the most common cause of poor quality of the coating of the profiled sheet is unqualified installation, fixing defects. For the roof to serve for a long time without leaking, it is necessary to properly lay and fix the roofing material. In this article we will describe how many self-tapping screws will be needed to fix each profiled sheet, and also how their layout looks.

Requirements for fasteners

The main advantages of corrugated roofing - light weight, which allows you to mount this roofing material on a thin crate, which reduces construction costs. The professional leaf is made of galvanized steel, coated with polymer or paint. Reliability, durability and tightness of the structure depend on the reliability of the sheeting to the roof. Installation is carried out without prior manufacture of the holes, so special roofing screws are used, which meet the following requirements:

1. Self-tapping screws for a roof from the pro-thinned-out steel have a sharp tip drill which easily cuts through strong metal without preliminary drilling.
2. Self-tapping screws for fixing the roofing sheeting to the roof are made of galvanized steel, which withstand constant contact with water, but do not enter into oxidative reactions with it.
3. For fixing the roofing material used screws, supplied with a latex, rubber or neoprene sealant, which seals the holes on the surface of the roof.
4. The size of fasteners for fixing the profiled sheet should be 2-3 mm higher than the thickness of the sheathing of the sheathing and the sheet of roofing material.
5. Roof fasteners have a length of 19-250 mm and a diameter of 4.8-6.3 mm. The most demanded size of self-tapping screws is 4.8x28 mm, 4.8x50 mm, 4.8x60 mm.
6. The size of fasteners for the ridge profile of the roof is 4.8x60 mm.
7. Ogolovki screws for professional sheets are painted by manufacturers in the color of the roof, so that they are visually invisible.

Pay attention! High-quality fasteners of galvanized steel are not cheap, while the consumption of screws for fastening each sheet is 8-10 pieces per 1m2. At the same time, the flow rate when mounting the end sheets and shaped elements of the roof increases 1.5-2 times.

Mounting scheme

Inexperienced craftsmen often wonder how many self-tapping screws are needed to fix each sheet of corrugated roofing, and what tools are needed for this. It is important that the increased consumption of fasteners when installing the roof reduces the tightness of the coating and leads to the deformation of the material. If during the attachment of "greedy", decking will not withstand intense felt loads. In order not to be mistaken, for the time of work, experienced craftsmen selected the optimal arrangement of self-tapping screws:

• During the fastening of the proflist, the screws are screwed into the strictly lower part of the wave adjacent to the batten rail.
• Fixing the roofing material on the roof, screws tighten strictly perpendicular to the batten rail, preventing the fastener from deviating from this axis.
• The maximum allowed spacing between self-tapping screws when mounting a profiled sheet is 50 cm.
• Along the edges of the sheet, the screws are screwed every second wave, and in the middle - in a checkerboard pattern. The end sheets are fixed to each rail to the crate without gaps in order to reduce the risk of the cover being blown off by the wind.
• Consumption of fasteners for mounting 1 sheet is 6-8 pieces, based on this indicator, the calculation of the required number of screws is made.
• Screw fasteners into the upper crest of the wave is allowed only in the joints of two sheets of sheeting.

Important! The light weight of the profiled steel allows the use of a lattice crate with a pitch up to 1 m, the size of the rails of which is 40x40 mm or 60x40 mm. The design of the rafter frame is not difficult. Despite the low weight, the roof of the profiled sheet is subjected to a large load, therefore, the requirements for the quality of fasteners are high.

Laying technology

Профнастил – современный кровельный материал, который используется для перекрытия крыш с уклоном от 8 градусов. Laying technology материала зависит от угла наклона скатов конструкции. Монтаж листов выполняют внахлест, чтобы обеспечить герметичность стыков. Given the light weight of the profiled sheet, the roof with such a coating has a high windage and is experiencing intense wind loads, so the step between the screws is not to exceed 50 cm. Decking stack as follows:

1. Pitched roofs begin to search from the bottom of the end, laying the first sheet with a protrusion of 2-3 cm.
2. When laying, the top row is always placed on the bottom to prevent melt or rain from flowing into the joints.
3. The horizontal minimum overlap between the sheets is 10 cm, which is 1 wave. The smaller the slope of the roof, the more do overlap.
4. Vertical overlap between the sheets make 20-25 cm.
5. If the slope of the roof slopes is less than 15 degrees, the vertical and horizontal joints are treated with a silicone-based sealant to reliably seal the seams.
6. Each sheet is fixed to the lower and upper rails of the batten in each wave, the remaining screws are screwed in a checkerboard pattern so that the maximum distance between them does not exceed 50 cm.
7. The fasteners are screwed into the lower part of the wave adjacent to the crate so that when a wind load appears, there is no lever effect.
8. On the connection of the slopes establish a ridge profile, fixing the detail with screws in each wave.

Note that after installation, it is important to monitor the condition of the fasteners on the roof surface. They should not loosen or unwind. In order for the intense wind load not to cause the roof to deform, it is necessary to quickly tighten it with a screwdriver. If rust appeared in the attachment points, it is better to replace the screws with galvanized ones.

Video instruction