The average thickness ranges from 45-90 mil. It is typically recommended to install a membrane that is at least 50 mil thick.
Do flat roofs have plywood?
Installing sheathing on a flat roof is much easier than working on a peaked roof. The sheathing is the base you lay over the rafters that holds the roofing felt and shingles. Plywood is typically used as sheathing, although you can use particle board or oriented-strand board.
Can I use 1/2 inch plywood for shed roof?
If the shed is for light tools then 1/2 inch pressure treated plywood is acceptable. If the shed is for heavier storage, then pressure treated 3/4 inch exterior-grade CDX plywood is the best.
How thick should a flat roof be?
The average thickness ranges from 45-90 mil. It is typically recommended to install a membrane that is at least 50 mil thick.
What's the best plywood for a flat roof?
Builders love plywood for its water resistance, structural stability and low cost. They also love oriented strand board, though. It costs even less and is comparable to plywood on the other two counts, and they increasingly prefer OSB for roof sheathing. Either is an acceptable choice in most jurisdictions.Dec 6, 2018
How thick should my roof sheathing be?
Sheathing must be a minimum of 19/32-inch thick. Never affix roof sheathing with staples; 8d ring-shank nails need to be used instead. The normal thickness range for sheathing is 3/8 to 3/4 inch.
Can you roof 3/4 plywood?
Most Common Thickness It will support roof loads for most situations and is the standard for most roof applications. Roofs with very heavy loads may require 3/4-inch thickness. Regardless of thickness, the plywood should be a type suitable for exterior use, graded "Exterior" or "Exposure 1."Dec 6, 2018