The thickness of plywood used for roof decking depends on the roof slope the spacing of rafters and the weight of other material to be put over the decking as well as the design load the.
Roof decking and roof covering difference.
Plank sheathing usually 1 6 or 1 8 was used as a roof deck before plywood.
In the first half of the 20th century roofs in missouri were built with wood shingles over planks spaced about 1 apart.
Wood shingle are expensive so when these roofs need to be torn off and replaced it is cheaper to resheath the entire roof and go over it.
How vinyl waterproof decking benefits roof decks.
If you already have one of these types of roofs you could potentially cover the existing roof with pvc vinyl decking on top of a flat hard surface but you re much better off taking the roof down and starting over with a high quality vinyl decking material.
Roof coverings as materials systems or fasteners can be weakened from extensive corrosion.
A roof s sheathing is simply a board that is nailed to rafters trusses or roofing joists covering them from the elements.
Roof systems typically fail when winds produce forces greater than the roof s strength.
Roofs can also fail if punctured by wind borne debris.
Winds can tear roof coverings from roof decks and can tear roof decks from framing.