Roof Sheathing Material Plywood Vs Osb

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.

Roof sheathing material plywood vs osb.

When used as a roof sheathing this tendency to hold moisture means it can degrade faster than plywood when exposed to chronic leaks. Osb takes longer to get wet than plywood but also takes longer to dry out. Lipinskiy mentions that plywood delaminates and unfortunately manufacturers do not issue warranties when the plywood rots on account of the elements. Talking about plywood or osb for roofing you cannot miss the information of the cost.

This makes the material perfect for roofing and other types of use. To be fair osb is not exactly best friends with water either. Osb is made by combining glue resin and wood chips and pressing them into the shape of a plywood sheet then baking everything together. 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. Oriented strand board osb combines wood chips glue and resin into the shape of a sheet of plywood and bakes them together. Compared to cdx oriented strand board osb is made very differently. Because of this manufacturing process osb is at least half the cost of cdx plywood.

Sheathing a 2 400 sq. Home at current prices would cost about 700 more with plywood than osb. 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 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.

Home osb is about 700 less expensive compared with plywood if used as the subfloor sheathing and roof decking. Cost of plywood vs osb osb is cheaper than plywood by about 3 to 5 per panel. For a typical 2 400 sq. It is generally believed that osb is cheaper than plywood.

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. It s simply the lesser of two evils according to lipinskiy. Osb win against plywood when it comes to shear strength. You can have an osb that s larger than your plywood.

It is true as the price of every osb board is around 15 20 per sheet 4 8 sizes.