Garage Roof Sheathing Thickness

Roof material then covers all.

Garage roof sheathing thickness.

Get free estimates from local roofing contractors. In practice many builders default to 1 2 inch plywood even if they plan. The thickness required by josh s circumstances are good for roof snow loads of up to 70 psf again spanning 24. Loads will vary with the.

The inch thick boards extend from the eaves just past the exterior walls where they butt up against the plywood roof sheathing. 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. If your roof is more on the flatter side then it s expected to have a heavier load. 7 16 plywood or similar with span rating of 24 0 supported on 24 centers requires h clips on all horizontal joints centered in each rafter bay.

For the curious 7 16 osb has a span rating of 24 16 and with supports every 24 inches is good for a roof live load of 40 psf pounds per square foot with a 10 psf dead load. That s considered to be the minimum. That will suffice on a roof with rafters set 16 inches apart with minimal roof loads. Roof trusses when used shall be engineered and pre manufactured.

Roof sheathing may be 1 nominal thickness lumber 7 16 cdx plywood or other approved material. If the nails penetrate the sheathing but not the studs the minimum plywood thickness that the irc designates is 1 2 inch. The thickness will range from 3 8 to 3 4 inch depending upon local code. In the u s roof sheathing is almost always composed of wood usually osb oriented strand board or plywood.

Sheathing should be a minimum of 19 32 inch thick. Osb is lightweight relatively inexpensive and strong enough to resist bending or breaking should someone walk on the roof. 8d ring shank nails should be used instead. Roof sheathing comes in grid marked 4 by 8 foot sheets and should be installed perpendicular to the frame.

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 typical thickness range for sheathing is 3 8 to 3 4 inch. Never attach roof sheathing with staples. Roof sheathing or decking is one of those elements.