Osb Or Plywood For Roof

Despite also being susceptible to water damage lipinskiy says that.

Osb or plywood for roof.

It becomes soft and weak when it delaminates. Plywood is better than osb for subfloors. The curb appeal of your home is lost because soon your shingles will start to misalign creating an eyesore on the top of your home. For plywood it is like 5 to 10 more expensive.

A few other downsides to plywood. New homes will usually see a few rainfalls before a roof is on and as noted above osb doesn t handle moisture well. This is one of the reasons why some people prefer using plywood for their roof or subfloor. Unfortunately an osb is less resistant to water compared to plywood.

While a sheet of plywood might be 5 to 7 plies thick a sheet of osb is made from as many as 50 strand layers packed and compressed into the same thickness. Oriented strand board osb combines wood chips glue and resin into the shape of a sheet of plywood and bakes them together. Thankfully there are osb materials today that are designed to be moisture resistant. 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.

2x greater shear strength than similar sized plywood source. 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 cdx plywood and osb tend to come in standard sheets of four foot by eight foot 4 8.

It is true as the price of every osb board is around 15 20 per sheet 4 8 sizes. When it gets wet the sheathing could swell and thicken up because of the moisture. However you might find that osb can better suit your needs than plywood for the roof. Because of its construction some manufacturers actually make larger sheets of osb.

University of massachusetts meets most building codes for roof and wall sheathing. It is generally believed that osb is cheaper than plywood. Because of this manufacturing process osb is at least half the cost of cdx plywood. Talking about plywood or osb for roofing you cannot miss the information of the cost.

Both osb and plywood absolutely hate water lipinskiy mentions going on to say that the most important part regardless of which decking option you choose is that all penetration points on a roof are sealed. Today you can find osb in thickness from 7 16 to 1 1 8 for different applications from roof wall subfloor i joists and everything between. Osb panels can be manufactured in lengths up to 16 feet or sometimes even higher while plywood is generally limited to 8 to 10 feet.