Minimum and optimal roof slopes from profiled sheet

Professional sheet can be used on roofs with an angle of inclination of 20 degrees. A building slope of 8 degrees is also allowed by building standards, but this only applies to industrial facilities and the profile must be self-supporting. For residential buildings with a self-supporting profile - the slope should be from 10 degrees.

The overlap with which you will fasten the sheets of corrugated board also depends on the chosen angle of inclination of the roof. If the angle is from 15 to 30 degrees, then the overlap should be 20 cm, if the roof is 30 degrees or more, then the overlap should be 15 cm. If the roof is flat (less than 15 degrees), then the sheet is superimposed on another sheet for 2 waves and joints Be sure to go through the sealant.

The pitch of the lathing also depends on the slope of the roof (if the decking is superimposed on a wooden base). The steeper the roof, the less often the crate. On flat roofs, it is recommended that it is completely solid. The roof slope must be monitored throughout all installation work. Deviation from the norm is allowed within 5%. In the places where chimneys and ventilated pipes exit, an additional crate is also placed. And on the ledge, the bars of the crate should be thicker than others.

Decking is very easy to lay. And to do it yourself is very simple. It is mounted on self-tapping screws. Self-tapping screws must be galvanized and have a rubber washer for sealing. You need to fasten the sheet from the upper edge to the inner bend of the wave. The self-tapping screw should enter the sheet and the crate under it strictly at right angles. It is not necessary to tighten the fastening strongly, but also loosely so that the sheet “hangs” also should not be done.

Under the corrugated board you need to lay a certain roofing cake. Layers of the pie must necessarily be in a certain sequence and lined correctly and without errors. Errors only reduce the life of both the roof and the roof as a whole. Roofing pie includes waterproofing, vapor barrier, and insulation (thermal insulation). Each layer uses its own specialized material. The thickness of the layer depends on the conditions in which the roof will be operated. So, for example, if the under-roof space is exploitable, then the thickness of the insulation should not be less than 25 cm.

You can read more about installing roofing from corrugated board on our website in the appropriate section.