Roof Thickness Standard

For example standard 29 gauge steel roofing made in long panels is about 0 36 millimeters thick and the 26 gauge version is slightly thicker at 0 48 millimeters.

Roof thickness standard.

Each gauge represents a nominal decimal range. Manufacturers express the thickness of metal panels as their gauge with 22 gauge being the thickest and 29 gauge the thinnest of traditionally sold metal roof and wall panels. Standard roof sheathing which consists of 4 by 8 sheets of plywood or oriented strand board or osb is 1 2 inch thick and attaches directly to the roof rafters or the roof trusses. D6878 d6878m 19.

An exception to this standard however may occur if you intend to install slate concrete or tile shingles on your roof. Standard specification for ketone ethylene ester based sheet roofing. D7635 d7635m 18. Some steel shingles and tiles have a baked on granular coating that adds to their thickness and the mra notes that those products are usually made from 26 gauge steel.

The standard provides material composition and physical property requirements. To support the added weight the architect or engineer may require the roofing contractor to install 5 8 inch roof sheathing. 014 018 exposed fastener corrugated aluminum roofing. Standard test method for measurement of thickness of coatings over fabric reinforcement.

The min thickness of the roof slab should be 6 inches and maximum it can go up to 13 14 inches for span up to 7 m long. Standard specification for thermoplastic polyolefin based sheet roofing.