Rthickness Of Roof Sheathing

The thickness of plywood used for roof decking depends on the roof slope the spacing of.

Rthickness of roof sheathing.

Installation details shall conform to sections 2304 7 1 and 2304 7 2 for floor and roof sheathing respectively. Many code requirements are not inspected. Roof sheathing materials plywood. You would go to table r503 2 1 1 1 to determine minimum nominal panel thickness.

1 inch 25 4 mm. Typical types of wood used for roof sheathing are oriented strand board known as osb and plywood. 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. It also holds roofing nails.

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. Floor or roof sheathing conforming with this table shall be deemed to meet the design criteria of section 2304 7. A strong resilient roof is a home s first line of defense when the roof deck is exposed to weather.

Plywood is made with three or more layers of thin wood glued together with the grain. That s considered to be the minimum. 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. And for wood structural panel sheathing r803 2 2 allowable spans.

With a porch roof the thickness of the assembly stops at the exterior wall and a simpler uninsulated self supporting porch structure that can be sheathed with the same t g sheathing as the interior ceiling extends beyond. According to 2009 irc table r803 1 minimum thickness of lumber roof sheathing. The minimum plywood for roofing plywood is layers of wood. Allowable spans for lumber floor and roof sheathing a b for si.

Oriented strand board osb. Roof sheathing thickness unlike with plywood siding the plywood sheet to be used for sheathing should be at least 3 8 inch thick.