How Thick Is Roof Sheathing

Several factors must be considered when determining appropriate roof sheathing thickness such as the.

How thick is roof sheathing.

Plywood s advantage over osb. Typical types of wood used for roof sheathing are oriented strand board known as osb and plywood. 1 inch 25 4 mm. Many factors affect thickness.

Required sheathing thickness for roofing important factors. Plywood is made with three or more layers of thin wood glued together with the grain. The thickness of plywood used for roof decking depends on the roof slope the spacing of. Roof sheathing panel spacing hints.

The minimum plywood for roofing plywood is layers of wood. Unlike with plywood siding the plywood sheet to be used for sheathing should be at least 3 8 inch thick. 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 skeleton of a roof is formed with rafters or trusses generally spaced 16 inches or 24 inches apart from the center of one rafter to the center of the next.

Floor or roof sheathing conforming with this table shall be deemed to meet the design criteria of section 2304 7. Maximum 19 percent moisture content. Spacer type panel edge clips are available from some manufacturers. Common roof sheathing materials include several types which are chosen depending on the budget and weather conditions of the area.

To stabilize the rafters support the roofing material and hold the entire roof together roof sheathing is installed. An exception to this standard however may occur if you intend to install slate concrete or tile shingles on your roof. Installation details shall conform to sections 2304 7 1 and 2304 7 2 for floor and roof sheathing respectively. The greater ability a wall has to dry the more durable it will be and everyone.

Use a 10d box 0 128 inch by 3 inch nail as a spacer to gauge 1 8 inch edge and end spacing between panels. Panel thickness will also affect permeability using the 2 perm variable of 7 16ths osb sheathing at 3 4 thickness the permeability drops to 2 3rds of a perm.