More Picture Of What Thickness Of Plywood Is Used For Roofing Free Download. Shuttering plywood is another type of plywood but it generally isnt used in roofing. You might be tempted to choose a.
And this will reduce the life of the shingles tar paper and roof. With edge support and the same snow load 38-inch OSB can be used. If you think of the way that plywood is manufactured every 18 thickness is a different layer that is rotated 90 degrees which is what gives plywood its bi-directional strength and dimensional stability.
The boards of this thickness are not recommended to be used for a flat roof.
Generally plywood comes in 4 by 8-foot sheets and in a variety of grades. If you mix thicknesses of plywood it will cause a problem eventually and the thicker sheathing will be noticeable probably within a month. Instead it is used to hold concrete whilst it sets. Boards measuring 1 inches by 4 inches or 2 inches by 4 inches are commonly used for purlins though never use treated lumber because it will corrode the steel roof and fasteners.