What Thickness Of Plywood Is Used For Roofing

Generally plywood comes in 4 by 8 foot sheets and in a variety of grades.

What thickness of plywood is used for roofing.

Foot and with a maximum of spacing of 16 inches between rafters. 3 8 should be replaced optimally but it would be better to use all the same thickness sheathing than to mix them. When this is the case experts recommend a 5 8 inch thick sheet. Typical types of wood used for roof sheathing are oriented strand board known as osb and plywood.

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. Many factors affect thickness. 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. The thickness of plywood used for roof decking depends on the roof slope the spacing of.

It is about 2 to 3 millimeters thick and is generally used indoors since it looks more decorative than thicker plywood boards. Several factors must be considered when determining appropriate roof sheathing thickness such as the. 3 ply is one of the most common types of plywood. Instead it is used to hold concrete whilst it sets.

Keep in mind that the load of the roof still plays a role in the plywood thickness. That s considered to be the minimum. A flatter roof with rafters farther apart may need a thickness of up to inch. Many homes have rafters that are even wider at 24 inches apart and will require a thicker sheet of plywood.

Required sheathing thickness for roofing important factors. If you mix thicknesses of plywood it will cause a problem eventually and the thicker sheathing will be noticeable probably within a month. This kind of plywood can be used on roofs with minimal load. Roof sheathing thickness unlike with plywood siding the plywood sheet to be used for sheathing should be at least 3 8 inch thick.

The minimum plywood for roofing plywood is layers of wood. Plywood is made with three or more layers of thin wood glued together with the grain. The ideal thickness for the standard rafter spacing of 24 inches is 5 8 th of an inch. And this will reduce the life of the shingles tar paper and roof.

Steeper rather than flatter roofs will have lesser load per sq. 5 ply is a versatile type of plywood that is about 4 millimeters thick.