Question: What Type Of Plywood For Exterior Walls?

How thick should plywood be for exterior walls?

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 the sheathing. If the nails penetrate the sheathing, but not the studs, the minimum plywood thickness that the IRC designates is 1/2 inch.

What type of sheathing is used for exterior walls?

Five common structural exterior sheathing options include wood-based, gypsum, glass mat, cement board, and Barricade® Thermo-Brace®. Plywood sheathing is made from whole sheets of wood that are cross-laminated, which give the boards strength and stiffness. This helps with expansion and contraction.

What type of plywood is used for siding?

When considering plywood for sheathing, builders choose from 1/2-inch CDX – common construction-grade material – or 1/2-inch pressure-treated plywood. According to Fixr, both of these materials cost more than 7/16-inch OSB does, which also works as a suitable exterior sheathing material.

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How thick should exterior wall sheathing be?

According to the California Uniform Building Code, the minimum recommended thickness for structural panels used in wall sheathing is 5/16 inch for studs 16 inches on center and 3/8 inch for studs 24 inches on center.

Can you use plywood for exterior walls?

Structural Fiberboard Plywood and OSB are largely considered the best wall sheathing choices because of their overall abilities to hold fasteners well, create a strong bond between studs, and provide some thermal advantages. Structural fiberboard is one such option.

Can I use plywood for exterior siding?

Relatively inexpensive, plywood is a favored budget siding choice. Home-grade exterior plywood siding has a rough sawn, textured appearance, and its edges are ship-lapped to allow for a tight fit.

Can you use OSB for exterior walls?

Many people prefer using OSB as an alternative to other siding materials such as metal or vinyl, which aren’t as strong or durable. OSB does have its downfall: moisture is its enemy. Measure the thickness of the OSB currently on the exterior of your home. OSB ranges in thickness from 7/16 inch to 1/2 inch thick.

Is OSB better than plywood?

Wood fiber is used more efficiently in osb. Osb is stronger than plywood in shear. Shear values, through its thickness, are about 2 times greater than plywood. This is one of the reasons osb is used for webs of wooden I-joists.

What is a good substitute for OSB?

In fact, a wide range of materials can be used to sheathe a wood-framed wall. In addition to OSB, builders can choose plywood, fiberboard, rigid foam, diagonal boards, and fiberglass-faced gypsum panels. If you’re a dyed-in-the-wool OSB user, it might be time to consider some of the available alternatives to OSB.

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What is exterior grade plywood?

Exterior Grade Plywood, (also known as construction-grade plywood), is made from regular grade plywood sheets. Yet, these sheets have been fastened together using water-resistant ‘Exterior Glue’. Exterior grading is usually indicated by adding an ‘X’ letter to the standard grade of a sheet of plywood.

Is exterior plywood water resistant?

How is Plywood Used Outdoors? Exterior plywood is weather (and water) resistant, so it’s strong enough to be used outside and also in areas that are exposed to water and humidity, like a garage. This type of plywood, often made from Douglas fir, is made stronger by adhering its layers with a waterproof glue.

Do I need plywood under siding?

Question: Do you put plywood under siding? Answer: If it’s plywood sheathing, yes you can put it under the siding. It’ll be the best structural support for your house. In that case, your plywood sheathing should be 3/8inches.

What is the most common thickness of exterior sheathing?

For covering existing siding, 1/2-inch and 3/4-inch thicknesses are commonly used. Standard panels are 2 by 8, 4 by 8, and 4 by 9 feet, although some can be purchased in fan-folded panels that run up to 50 feet long.

Is 7/16 OSB good for exterior walls?

Wood frame exterior walls must be fully sheathed, including areas above or below wall openings, with minimum 7/16-in. wood structural panels. Interior shear walls must be fully sheathed including areas above or below wall openings with minimum 7/16-in.

Is OSB or plywood better for roof sheathing?

Plywood Holds the Moisture Advantage Over OSB When plywood gets wet, it tends to swell. 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.

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