Garage Roof Sheathing Thickness

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.

Garage roof sheathing thickness.

If your roof is more on the flatter side then it s expected to have a heavier load. 8d ring shank nails should be used instead. That s considered to be the minimum. The inch thick boards extend from the eaves just past the exterior walls where they butt up against the plywood roof sheathing.

Roof sheathing comes in grid marked 4 by 8 foot sheets and should be installed perpendicular to the frame. Minimum thickness most roofs will be sheathed in plywood 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. 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.

That will suffice on a roof with rafters set 16 inches apart with minimal roof loads. If the nails penetrate the sheathing but not the studs the minimum plywood thickness that the irc designates is 1 2 inch. Loads will vary with the. In practice many builders default to 1 2 inch plywood even if they plan.

Roof material then covers all. Never attach roof sheathing with staples. 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.

The thickness will range from 3 8 to 3 4 inch depending upon local code. Roof sheathing or decking is one of those elements. Sheathing should be a minimum of 19 32 inch thick. 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.

Get free estimates from local roofing contractors. The typical thickness range for sheathing is 3 8 to 3 4 inch. Unlike with plywood siding the plywood sheet to be used for sheathing should be at least 3 8 inch thick. Osb is lightweight relatively inexpensive and strong enough to resist bending or breaking should someone walk on the roof.