1 2 Plywood Decking For Roofs

As a quick primer in plywood each side is rated from a to d.

1 2 plywood decking for roofs.

Provides exceptional dimensional stability and stiffness. Open spaces form between the once tightly fitted shiplap boards. For rafters spaced 20 or more inches apart 1 2 or 5 8 inch plywood is recommended. It will support roof.

The most common rafter spacing is 24 inches and 5 8 inch plywood is recommended for that. Plywood typically comes in 4 8 ft. A is smooth and knot free while d the lowest quality has missing knots and cracks. The common grade of plywood for roof sheathing is cdx.

Steeper rather than flatter roofs will have lesser load per sq. 3 4 plywood 4x8 3 8 plywood plywood subflooring plywood roof sheathing 48 24 sheathing plywood 3 4 in. Oriented strand board is an excellent choice for roof deck wall and subfloor sheathing. Severe weather 1 2 in common douglas fir plywood sheathing.

After the 1960s the predominant residential roofing substrate became 1 2 cdx plywood. Today a shiplap roof is usually 60 years old. Before lumber companies began selling osb the standard choice for sheathing a roof with a 24 inch rafter spacing was 1 2 inch cdx plywood the letters cdx indicate that it is construction grade. Plytanium 23 32 cat ps1 09 square structural pine sheathing application as 4 x 8.

This kind of plywood can be used on roofs with minimal load. Roof sheathing materials plywood. Cdx ground contact pressure treated plywood model 131876 45 98 45 98. For example if your roof is 1 500 ft 2 then it will take 47 sheets of plywood to sheath it.

Comes in standard 4 by 8 foot sheets is strong durable and relatively light. The minimum thickness of plywood used for roofing is 3 8 th of an inch. Over time shiplap fir wood resin dissipates causing the boards to shrink crack form knot holes and become extremely brittle. 1 500 32 46 875 sheets it will be a good idea to get an extra few sheets of plywood when ordering to allow for waste and off cuts.

It also holds roofing nails well. Foot and with a maximum of spacing of 16 inches between rafters. For pricing and availability. Oriented strand board 660663 the home depot.