How Thick Roofing Plywood

Keep in mind that the load of the roof still plays a role in the plywood thickness.

How thick roofing plywood.

When used for roofing plywood panels are covered and protected by a variety of building materials that keep the elements at bay including roof felt underlayment flashing and shingles. Osb and plywood come in thicknesses ranging from 5 16 to 3 4 inch and the thickness needed for a particular roof depends on several factors including rafter spacing expected load and roof design. Severe weather 1 2 in common douglas fir plywood sheathing application as 4 x 8. Rafters run from the peak of the roof.

The minimum plywood for roofing. That s considered to be the minimum. When this is the case experts recommend a 5 8 inch thick sheet. The most common plywood uses include support for floors walls roofs and garages in residential construction.

That s considered to be the minimum. Many homes have rafters that are even wider at 24 inches apart and will require a thicker sheet of plywood. This minimum will only work if the rafters are set 16 inches apart at most and if the roof doesn t have too much load.