Readers ask: What Plywood To Use For Roof?

Which plywood is best for roofing?

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

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.

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.

Can you use plywood for roofing?

You can use any cheap plywood or even particle board as a short term sheathing on a shed roof, but cover it with a layer of rolled roofing. As Sharptooth said, it will delaminate in no time if not covered. Roll Roofing is inexpensive and easy to install.

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Is CDX plywood good for roofing?

Only use CDX plywood for the interior of a house, where water damage is far less likely. Do not use CDX for roofing, sheds, or other places that are exposed to moisture consistently. The sole exception to this is pressure treated CDX, which can survive for decades without even a protective coating.

What is the best material for roof sheathing?

OSB is now the most-used sheathing and subflooring material for new roofs and roof replacements. OSB is currently selling for less than plywood by approximately $3 per sheet, meaning a savings of several hundred dollars per conventional home.

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.

Do I need pressure treated plywood for roof?

Pressure -treated lumber is one of the best options that you can use for a roof deck because of its extreme durability. If you are constructing a roof deck, you will need to be concerned with the amount of water that gets on the wood. Pressure-treated wood already has a built-in water resistance.

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 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.

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.

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.

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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