Thickness Of Roof Sheathing

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.

Thickness of roof sheathing.

Zip system roof assembly combines our revolutionary integrated sheathing and flashing tape or liquid flashing to provide a sealed roof for protection against moisture intrusion during construction or if high winds strip the roof covering away. Floor or roof sheathing conforming with this table shall be deemed to meet the design criteria of section 2304 7. The common grade of plywood for roof sheathing is cdx. And if you re still wondering what roof sheathing is and what materials are typically used read on and satisfy your curiosity.

Typical types of wood used for roof sheathing are oriented strand board known as osb and plywood. Loads will vary with the. Unlike with plywood siding the plywood sheet to be used for sheathing should be at least 3 8 inch thick. Some departments do not have the man power to do roof sheathing inspection inspectors can not see everything and assume that the builder knows enough to do some things right.

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. Roof sheathing materials plywood. 1 inch 25 4 mm. Several factors must be considered when determining appropriate roof sheathing thickness such as the.

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. Required sheathing thickness for roofing important factors. Roof sheathing attaches to the surface of the rafters or trusses to form the structural skin of the roof. Installation details shall conform to sections 2304 7 1 and 2304 7 2 for floor and roof sheathing respectively.

Allowable spans for lumber floor and roof sheathing a b for si. That will suffice on a roof with rafters set 16 inches apart with minimal roof loads. That s considered to be the minimum. 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.

A strong resilient roof is a home s first line of defense when the roof deck is exposed to weather.