Often asked: What Plywood Do You Use For Roofing?

What kind of plywood do you use on roof?

CDX is the grade of plywood most commonly used for roofing (CDX plywood means it is Construction Grade for exterior purposes).

What thickness plywood is used for roofing?

Most Common Thickness The most common rafter spacing is 24 inches, and 5/8-inch plywood is recommended for that. It will support roof loads for most situations and is the standard for most roof applications. Roofs with very heavy loads may require 3/4-inch thickness.

What grade of plywood is used for roof sheathing?

1/2 or 3/4-inch Plywood for Roof Sheathing? – Traditionally, 1/2-in CDX plywood was common choice with 24-in rafter spacing. However, heavier roof loads may require the use of 3/4-in CDX plywood for roof sheathing. Roofs with less pitch often carry heavier loads, including snow and ice accumulations in the winter.

Can I use plywood for roofing?

How to Install Plywood Roof Sheathing for the Perfect Roof Shingle Installation. Rather than using batons, which other roofing materials use, Roof shingles are actually installed over a plywood deck. This plywood deck, which covers the entire roof, provides a perfectly straight surface for the shingles to be applied.

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What is better for roofing OSB or plywood?

OSB takes longer than plywood to get saturated, but also takes much longer to dry out. When used as roof sheathing, this tendency to hold moisture means it will degrade faster than plywood when exposed to chronic leaks.

Can CDX plywood be used for roofing?

CDX Plywood is used primarily by contractors to build exterior walls and roofs. CDX plywood has one side veneer grade “C” and one side veneer grade “D”. The two are bonded together with glue which can withstand a little moisture. The APA would recognize CDX Grade Plywood as C-D Exposure 1 plywood.

How much is a sheet of plywood for roofing?

Your price could vary depending on how much the roofing company charges for labor, but generally, you can expect to spend between $70 to $100 for each sheet of plywood. A 4 x 8 sheet of plywood covers about 32 square feet of roof area—and the average roof measures about 3,000 square feet.

What is the best plywood for a flat roof?

How to build a flat garage roof? A flat base is required to lay the roof covering on. This can be either Smartply OSB3 or good quality, structurally sound WBP plywood. A minimum thickness of 18mm must always be used.

Can I use 1/2 inch plywood for shed roof?

If the shed is for light tools then 1/2 inch pressure treated plywood is acceptable. If the shed is for heavier storage, then pressure treated 3/4 inch exterior-grade CDX plywood is the best.

Is 7/16 OSB OK for roofing?

or a non-laminated panel, such as this OSB. Either one is acceptable. The typical thickness of roof sheathing is about 7/16-inch, which is just under 1/2-inch. If you find 3/8-inch plywood installed as roof sheathing, it’s a good idea to make your client aware of its presence.

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What is the best thickness for roof sheathing?

The recommended thickness for roof sheathing is ⅝” thick. Sheathing with a thickness of less than that is much more likely to result in bowing between framing which could potentially compromise your exterior roof material.

Can you put 2 layers of plywood on a roof?

The new plywood will have to be nailed to the rafters or roof trusses. That increase in weight should not be a problem with the single layer of asphalt shingles you will be installing, because it is normally safe to assume the roof structure is built to support the weight of two layers of asphalt shingle roofing.

Can I use plywood for shed roof?

Re: What thickness of plywood for shed roof? Shed kits from shed shops tend to use 12mm OSB because it’s cheap. which should lead your thinking to “Will the walls take the load?” If you have 18mm ply, and it’s WBP ply, and you’re not planning to garden on top of it, then it will do the job.

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