Rthickness Of Roof Sheathing

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

Rthickness of roof sheathing.

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. Floor or roof sheathing conforming with this table shall be deemed to meet the design criteria of section 2304 7. Typical types of wood used for roof sheathing are oriented strand board known as osb and plywood. Plywood is made with three or more layers of thin wood glued together with the grain.

According to 2009 irc table r803 1 minimum thickness of lumber roof sheathing. Comes in standard 4 by 8 foot sheets is strong durable and relatively light. Made up of multiple layers of wood strands compressed at odd angles to each other and bound. The minimum plywood for roofing plywood is layers of wood.

You would go to table r503 2 1 1 1 to determine minimum nominal panel thickness. 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. A strong resilient roof is a home s first line of defense when the roof deck is exposed to weather. Installation details shall conform to sections 2304 7 1 and 2304 7 2 for floor and roof sheathing respectively.

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. Allowable spans for lumber floor and roof sheathing a b for si. It also holds roofing nails.

1 inch 25 4 mm. Roof sheathing materials plywood. Oriented strand board osb. And for wood structural panel sheathing r803 2 2 allowable spans.

That s considered to be the minimum. Many code requirements are not inspected.