What Size Plywood For Roof Decking

How to install osb sheathing installation instructions guide roof deck osb sheeting install tips duration.

What size plywood for roof decking. The industry offers a thickness of anywhere from 516 inch to inch. It is an exterior grade plywood with a thickness just under 12 inch. As a quick primer in plywood each side is rated from a to d. Osb and plywood come in thicknesses ranging from 516 to 34 inch and the thickness needed for a particular roof depends on several factors including rafter spacing expected load and roof design.

30 years on its working out fine. If it makes any difference those firewalls get cut about 1 above the roof framed with plywood and covered in flashing. The osb for cost cutting. A is smooth and knot free while d the lowest quality has missing knots and cracks.

Over the years i have seen claims for plywood decking delaminating which can cause squeeks and knocks between the plys. The per se cutting of the osb a mere irrelevancy a red herring. So what size plywood should you use for your roof. Look for something thats graded as exposure 1 or exterior.

Bmitch oct 27 12 at 019 atbmitch so you are saying that the plywood is solelyprimarily for nailing and re nailing effectiveness. It also holds roofing nails well. The topics covered on this site include activities in which there exists the potential for serious injury or death. Plywood long ago lost its market leadership to oriented strand board osb which is now the most used sheathing and subflooring material.

If the roof dips here and there because of the thin plywood the 18 jump may no be so bad in the mix of it all jack jul 26 16 at 424 here in snow country 12 osb is standard with 716 being common for walls. What size plywood should you use for your roof. Complete home remodeling diy 79277 views 407. Comes in standard 4 by 8 foot sheets is strong durable and relatively light.

What plywood should you use for a roof. Roof sheathing materials plywood. 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. The common grade of plywood for roof sheathing is cdx.

If you want the shed to be waterproof its roof must be constructed just like any other roof a plywood decking covered with shingles or with composite or metal roofing.