Thickness Of Roof Sheathing

The common grade of plywood for roof sheathing is cdx.

Thickness of roof sheathing.

Minimum thickness most roofs will be sheathed in plywood at least 3 8 inch thick. That will suffice on a roof with rafters set 16 inches apart with minimal roof loads. 1 inch 25 4 mm. Loads will vary with the.

And if you re still wondering what roof sheathing is and what materials are typically used read on and satisfy your curiosity. Unlike with plywood siding the plywood sheet to be used for sheathing should be at least 3 8 inch thick. Roof sheathing attaches to the surface of the rafters or trusses to form the structural skin of the roof. Typical types of wood used for roof sheathing are oriented strand board known as osb and plywood.

That s considered to be the minimum. Required sheathing thickness for roofing important factors. Depends on the roof load see table r503 2 1 1 1 7 construction exceeding the minimum requirements6 osb or plywood is the minimum you can use without edge support. Installation details shall conform to sections 2304 7 1 and 2304 7 2 for floor and roof sheathing respectively.

A strong resilient roof is a home s first line of defense when the roof deck is exposed to weather. Roof sheathing materials plywood. Several factors must be considered when determining appropriate roof sheathing thickness such as the. 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. It also holds roofing nails well. It spans the rafters to support the roofing and in the case of panel sheathing such as plywood or osb it acts as a diaphragm with the walls to resist horizontal loads. 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.

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.