Thickness Of Exterior Plywood On Roof

Roof sheathing comes in grid marked 4 by 8 foot sheets and should be installed perpendicular to the frame.

Thickness of exterior plywood on roof.

What size plywood should you use for your roof. The industry offers a thickness of anywhere from 5 16 inch to inch. What size plywood for the roof. The thickness of plywood used for roof decking depends on the roof slope the spacing of rafters and the weight of other material to be put over the decking as well as the design load the.

Foot and with a maximum of spacing of 16 inches between rafters. Another issue that many people encounter is what size plywood the roof may need. Plywood with fewer plies is weaker than a plywood with more plies even if they have the same thickness. 8d ring shank nails should be used instead.

So what size plywood should you use for your roof. Sheathing should be a minimum of 19 32 inch thick. A flatter roof with rafters farther apart may need a thickness of up to inch. Sheet with varying thickness.

1 inch 25 4 mm. This kind of plywood can be used on roofs with minimal load. Steeper rather than flatter roofs will have lesser load per sq. Minimum plywood thickness the international residential code specifies 3 8 inch plywood for sheathing walls with a standard stud spacing of 16 inches if the siding is nailed to the studs through.

Multi ply is a catchall term for plywood with seven or more plies. What plywood should you use for a roof. The typical thickness range for sheathing is 3 8 to 3 4 inch. The minimum thickness of plywood used for roofing is 3 8 th of an inch.

Installation details shall conform to sections 2304 7 1 and 2304 7 2 for floor and roof sheathing respectively. Plywood typically comes in 4 8 ft. Floor or roof sheathing conforming with this table shall be deemed to meet the design criteria of section 2304 7. Keep in mind that the load of the roof still plays a role in the plywood thickness.

Look for something that s graded as exposure 1 or exterior.