at an angle of inclination equal to 15 – 30 degrees - 20 centimeters;
at an inclination of 30 degrees or more – 15 centimeters.
When the design documentation specifies a minimum slope value, the corrugated sheet is installed with an overlap between the rows of 2 waves. Sealants and special sealants are used at the same time. In addition, the corrugated sheet must be laid on a solid sheathing.
Manufacturers produce two types of corrugated sheets - wall (C) and roofing (K). This material also differs in the shape of the profile. When covering the rafter structure, products with a relief in the form of waves or trapezoids, having a height of 25-31 millimeters, are usually used.
The optimal thickness of the corrugated sheet for the roof is considered to be 0.8 millimeters. In some cases, 1 millimeter products are used for cladding. Roofing material of this bangladesh mobile database is chosen when arranging a roof with a minimum slope of 8 - 15 degrees. On slopes with a large area, corrugated sheets should be laid in two or three rows.
But usually when designing a roof, it is envisaged to install the roofing covering in one row, for this reason it is necessary to pay attention to the length of the profiled sheet. Usually, products of 6 meters in length are available for sale.
Calculation of the amount of roofing materials
The roof project developed by professionals is accompanied by drawings and cost estimates. The procedure for calculating the amount of roofing material is simple. You need to divide the area of the slopes by the area of one profiled sheet.
At the same time, do not forget about overlaps. Since the minimum permissible slope of a roof made of corrugated sheets according to SNiP is 8 - 15 degrees, the value of this parameter will be equal to 20 centimeters. Then the overlap size must be subtracted from the sheet area.
When purchasing materials, it is necessary to make a small reserve, since damage to the products is possible during installation. The same applies to additional elements. Especially in the case of choosing a minimum slope for a roof made of corrugated sheets. In this case, it is imperative to comply with the permissible parameters.