Quick Answer: What Type Of Plywood Is Used 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 size OSB is used for exterior walls?

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.

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What is exterior plywood?

PLYWOOD – EXTERIOR PLYWOOD It is usually made from softwoods such as Douglas Fir or Pine. A structural exterior (water resistant) adhesive is used to adhere the veneer layers together. The higher grade panels are sanded on both sides and are sometimes referred to as Sanded Plywood or Sanded Panels.

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 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 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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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.

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.

What thickness is OSB board?

They are fairly straightforward but each one is fairly specific. The thickness of OSB that you need varies on where it is used in a building. Typically 3/4″(18mm) for floors and 3/8″ (9mm) for walls and 1/2″ (11mm) roof.

Is exterior grade plywood treated?

Exterior graded plywood refers to ply sheets that have had their veneers glued together with waterproof glue. Now, not all exterior graded plywood comes with chemical treatment as standard. But you can, (and always should), buy exterior graded plywood that has been pressure treated.

What type of plywood is waterproof?

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.

How long will exterior plywood last outside?

There are a few averages you can expect, but they are dependent on these factors. Plywood siding, such as T-111 should give at least a 35 year life expectancy, if finished properly; but there are many cases of it lasting over 50 years. Roof sheathing should last 30 to 40 years or to put it another way, two roofs.

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