What Is Sheathing Plywood?

What Is Sheathing Plywood?

What Is Sheathing Plywood?

Sheathing plywood is a type of plywood used to construct exterior walls and other structures. It’s made with thin layers of wood veneer and glued together in such a way as to form strong panels that can resist strong winds and other elements.

Sheathing plywood comes in several thicknesses, ranging from 1/4 inch up to 1-1/8 inch. It typically has two layers of binding material, such as wax or resin, between the veneer layers for extra strength.

These panels are ideal for use with siding, roofing underlayments, and decks because they provide solid support for these materials.

In addition to its structural uses, sheathing plywood may also be used as an interior wall covering or as a flat surface on furniture pieces such as shelves or tables.

Sheathing plywood is an incredibly versatile building material commonly used in the construction of structures. It is perfect for both interior and exterior walls and provides a strong, durable support for roofing systems.

What Is Sheathing Plywood Used For

Sheathing plywood is an incredibly versatile building material that can be used for a variety of applications. It is most commonly used in exterior walls, roofs, and decks, as well as floors and subfloors.

The sheathing helps to strengthen the structure by creating a uniform base layer that prevents cracking and shifting of the finished surface. Its waterproof quality also makes it ideal for outdoor projects such as decks, sheds and garages where moisture protection is essential.

Sheathing plywood also comes in various thicknesses and grades making it suitable for any job from light-duty shelving to heavy-duty load-bearing structures.

Types Of Sheathing

Sheathing plywood is a type of engineered wood used in construction. Its primary purpose is to act as a protective layer between the structure and other outside elements. Sheathing plywood comes in various types, including treated, untreated, tongue and groove, wafer board, and OSB (oriented strand board).

Treated sheathing helps protect against fungus, decay, and insects. Un-treated sheathing offers protection from weather elements but does not provide an insect deterrent. Tongue and groove provides a consistent look for installation on walls or ceilings.

Wafer board consists of thin panels that are light-weight and moisture resistant. OSB is a wide range of products with higher strength than many traditional wood panels due to their overlapping design technique.

What Is Sheathing On A Roof

Sheathing is the layer of plywood that goes over the rafters of a roof. It provides an essential structural base and waterproofing for the roof, and can also act as a fire barrier. Commonly used sheathing materials include exterior-grade plywood, particle board or fiberboard, or oriented strand board (OSB).

When installing sheathing, it is important to make sure that it extends beyond the edges of a roof so that any rainwater will be able to run off properly.


In conclusion, sheathing plywood is an important building material to keep in mind. It can be used for a variety of projects, such as roof and wall construction, flooring, and furniture making.

Proper care should be taken when working with sheathing plywood to ensure its integrity and longevity.

With the proper care and maintenance, you can enjoy the benefits of this versatile material for years to come!

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