Roof Thickness Standard

Astm d4479 standard specification for asphalt roofing coatings asbestos free applies to solvent based roof coatings of brushing or spraying consistency commonly used in constructing cold applied built up roof systems.

Roof thickness standard.

To support the added weight the architect or engineer may require the roofing contractor to install 5 8 inch roof sheathing. Each gauge represents a nominal decimal range. D7635 d7635m 18. Standard specification for ketone ethylene ester based sheet roofing.

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. D6878 d6878m 19. 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. The gauge of a metal roof refers to its thickness and the higher the gauge the thinner the metal.

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. Standard test method for measurement of thickness of coatings over fabric reinforcement. Standard specification for thermoplastic polyolefin based sheet roofing. An exception to this standard however may occur if you intend to install slate concrete or tile shingles on your roof.

Metal roofing thickness recommendations that include paint exposed fastener corrugated steel roofing. 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.