Roof Sheathing Material Plywood Vs Osb

To be fair osb is not exactly best friends with water either.

Roof sheathing material plywood vs osb.

Home osb is about 700 less expensive compared with plywood if used as the subfloor sheathing and roof decking. When osb does get wet it also tends to swell along the edges and those edges stay swollen even after the material has dried out. Lipinskiy mentions that plywood delaminates and unfortunately manufacturers do not issue warranties when the plywood rots on account of the elements. Osb win against plywood when it comes to shear strength.

Sheathing a 2 400 sq. Compared to cdx oriented strand board osb is made very differently. Cost of plywood vs osb osb is cheaper than plywood by about 3 to 5 per panel. Unlike other materials an osb has a squarer and smaller dimension.

Because of this manufacturing process osb is at least half the cost of cdx plywood. You can have an osb that s larger than your plywood. Osb is made by combining glue resin and wood chips and pressing them into the shape of a plywood sheet then baking everything together. Osb takes longer to get wet than plywood but also takes longer to dry out.

Roof sheathing attaches to the surface of the rafters or trusses to form the structural skin of the roof. Talking about plywood or osb for roofing you cannot miss the information of the cost. It spans the rafters to support the roofing and in the case of panel sheathing such as plywood or osb it acts as a diaphragm with the walls to resist horizontal loads. It s simply the lesser of two evils according to lipinskiy.

When used as a roof sheathing this tendency to hold moisture means it can degrade faster than plywood when exposed to chronic leaks. Home at current prices would cost about 700 more with plywood than osb. Oriented strand board osb combines wood chips glue and resin into the shape of a sheet of plywood and bakes them together. Not just that but most an osb is manufactured in different sizes.

For a typical 2 400 sq. It is often less expensive than cdx plywood because this manufacturing process doesn t require the same costly veneers found on the front and back of cdx plywood. Both osb and plywood absolutely hate water. Both types of panels contain phenol formaldehyde in the adhesive osb also contains isocyanurate resin but neither contains the urea formaldehyde which is quite toxic to humans.

It is generally believed that osb is cheaper than plywood.