Garage Roof Sheathing Thickness

If the nails penetrate the sheathing but not the studs the minimum plywood thickness that the irc designates is 1 2 inch.

Garage roof sheathing thickness.

Sheathing should be a minimum of 19 32 inch thick. The inch thick boards extend from the eaves just past the exterior walls where they butt up against the plywood roof sheathing. 8d ring shank nails should be used instead. In practice many builders default to 1 2 inch plywood even if they plan.

Get free estimates from local roofing contractors. When ordering the sheathing divide the total number of square feet of roof surface by 32 square feet a 4 x 8 panel and add an extra 15 for waste. Roof sheathing or decking is one of those elements. Loads will vary with the.

Roof sheathing comes in grid marked 4 by 8 foot sheets and should be installed perpendicular to the frame. Roof trusses when used shall be engineered and pre manufactured. That will suffice on a roof with rafters set 16 inches apart with minimal roof loads. Roof material then covers all.

In the u s roof sheathing is almost always composed of wood usually osb oriented strand board or plywood. Never attach roof sheathing with staples. Unlike with plywood siding the plywood sheet to be used for sheathing should be at least 3 8 inch thick. The thickness required by josh s circumstances are good for roof snow loads of up to 70 psf again spanning 24.

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. Roof sheathing may be 1 nominal thickness lumber 7 16 cdx plywood or other approved material. The typical thickness range for sheathing is 3 8 to 3 4 inch. That s considered to be the minimum.

Minimum thickness most roofs will be sheathed in plywood at least 3 8 inch thick. For heavier loads a 40 20 rated panel 19 32 or 5 8 will support a 130 psf live load and 48 24 rated panels 23 32 or are good to175 psf. Osb is lightweight relatively inexpensive and strong enough to resist bending or breaking should someone walk on the roof. The thickness will range from 3 8 to 3 4 inch depending upon local code.