Standard Thickness Roof Sheathing

Installation details shall conform to sections 2304 7 1 and 2304 7 2 for floor and roof sheathing respectively.

Standard thickness roof sheathing.

If you re in search of quotes for a roof sheathing job improvenet can put you in touch with up to four local contractors for free. The common grade of plywood for roof sheathing is cdx. Loads will vary with the pitch of the roof. It also holds roofing nails well.

That will suffice on a roof with rafters set 16 inches apart with minimal roof loads. You need to find a sheathing with a span rating of at least 32 16 which means either 15 32 or 1 2 thick osb. 1 inch 25 4 mm. That s considered to be the minimum.

An exception to this standard however may occur if you intend to install slate concrete or tile shingles on your roof. Roof sheathing comes in grid marked 4 by 8 foot sheets and should be installed perpendicular to the frame. The typical thickness range for sheathing is 3 8 to 3 4 inch. Roof sheathing materials plywood.

Most roofs will be sheathed in plywood at least 3 8 inch thick. With this thickness any deflection under dead loads only the weight of materials only should prove to be imperceptible. 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. Roof sheathing attaches to the surface of the rafters or trusses to form the structural skin of the roof.

Roof sheathing thickness unlike with plywood siding the plywood sheet to be used for sheathing should be at least 3 8 inch thick. Standard roof sheathing which consists of 4 by 8 sheets of plywood or oriented strand board or osb is 1 2 inch thick and attaches directly to the roof rafters or the roof trusses. Floor or roof sheathing conforming with this table shall be deemed to meet the design criteria of section 2304 7. Comes in standard 4 by 8 foot sheets is strong durable and relatively light.

Allowable spans for lumber floor and roof sheathing a b for si.