What Thickness Of Plywood Is Used For Roofing

Required sheathing thickness for roofing important factors.

What thickness of plywood is used for roofing.

That s considered to be the minimum. Roof sheathing thickness unlike with plywood siding the plywood sheet to be used for sheathing should be at least 3 8 inch thick. Plywood is made with three or more layers of thin wood glued together with the grain. A flatter roof with rafters farther apart may need a thickness of up to inch.

This kind of plywood can be used on roofs with minimal load. Foot and with a maximum of spacing of 16 inches between rafters. Typical types of wood used for roof sheathing are oriented strand board known as osb and plywood. If you mix thicknesses of plywood it will cause a problem eventually and the thicker sheathing will be noticeable probably within a month.

3 8 should be replaced optimally but it would be better to use all the same thickness sheathing than to mix them. Several factors must be considered when determining appropriate roof sheathing thickness such as the. Many factors affect thickness. Many homes have rafters that are even wider at 24 inches apart and will require a thicker sheet of plywood.

Shuttering plywood is another type of plywood but it generally isn t used in roofing. The minimum thickness of plywood used for roofing is 3 8 th of an inch. It is about 2 to 3 millimeters thick and is generally used indoors since it looks more decorative than thicker plywood boards. When this is the case experts recommend a 5 8 inch thick sheet.

Instead it is used to hold concrete whilst it sets. Steeper rather than flatter roofs will have lesser load per sq. 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. The ideal thickness for the standard rafter spacing of 24 inches is 5 8 th of an inch.

The minimum plywood for roofing plywood is layers of wood. Keep in mind that the load of the roof still plays a role in the plywood thickness. 3 ply is one of the most common types of plywood. Generally plywood comes in 4 by 8 foot sheets and in a variety of grades.

5 ply is a versatile type of plywood that is about 4 millimeters thick. And this will reduce the life of the shingles tar paper and roof.