Roof Sheathing Material Plywood Vs Osb

Sheathing a 2 400 sq.

Roof sheathing material plywood vs osb.

Roof sheathing attaches to the surface of the rafters or trusses to form the structural skin of the roof. 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. When used as a roof sheathing this tendency to hold moisture means it can degrade faster than plywood when exposed to chronic leaks. Lipinskiy mentions that plywood delaminates and unfortunately manufacturers do not issue warranties when the plywood rots on account of the elements.

To be fair osb is not exactly best friends with water either. Home osb is about 700 less expensive compared with plywood if used as the subfloor sheathing and roof decking. This makes the material perfect for roofing and other types of use. You can have an osb that s larger than your plywood.

It s simply the lesser of two evils according to lipinskiy. Talking about plywood or osb for roofing you cannot miss the information of the cost. Compared to cdx oriented strand board osb is made very differently. Oriented strand board osb combines wood chips glue and resin into the shape of a sheet of plywood and bakes them together.

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. It is generally believed that osb is cheaper than plywood. 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. Cost of plywood vs osb osb is cheaper than plywood by about 3 to 5 per panel.

Osb is made by combining glue resin and wood chips and pressing them into the shape of a plywood sheet then baking everything together. It is true as the price of every osb board is around 15 20 per sheet 4 8 sizes. Not just that but most an osb is manufactured in different sizes. Oriented strand board isn t plywood nor is it a type of particleboard fiberboard or wafer board and although it is a newcomer to a plywood dominated market its use for exterior sheathing is.

Both osb and plywood absolutely hate water. Because of this manufacturing process osb is at least half the cost of cdx plywood. Osb win against plywood when it comes to shear strength. Unlike other materials an osb has a squarer and smaller dimension.

Home at current prices would cost about 700 more with plywood than osb.