Osb Or Plywood For Roof

Unfortunately an osb is less resistant to water compared to plywood.

Osb or plywood for roof.

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. When it gets wet the sheathing could swell and thicken up because of the moisture. Talking about plywood or osb for roofing you cannot miss the information of the cost. However you might find that osb can better suit your needs than plywood for the roof.

It is true as the price of every osb board is around 15 20 per sheet 4 8 sizes. Because of this manufacturing process osb is at least half the cost of cdx plywood. It is generally believed that osb is cheaper than plywood. Plywood is better than osb for subfloors.

This is one of the reasons why some people prefer using plywood for their roof or subfloor. A few other downsides to plywood. Despite its common use as such we don t recommend using osb for subfloors but that s really just for aesthetic reasons. 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.

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. University of massachusetts meets most building codes for roof and wall sheathing. Osb boasts a more consistent density. Both cdx plywood and osb tend to come in standard sheets of four foot by eight foot 4 8.

Because of its construction some manufacturers actually make larger sheets of osb. 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. Thankfully there are osb materials today that are designed to be moisture resistant. Despite also being susceptible to water damage lipinskiy says that.

Oriented strand board osb combines wood chips glue and resin into the shape of a sheet of plywood and bakes them together. It becomes soft and weak when it delaminates. 2x greater shear strength than similar sized plywood source. New homes will usually see a few rainfalls before a roof is on and as noted above osb doesn t handle moisture well.

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. Earlier types of osb were known as waferboard which is now considered a sub standard version of oriented stand board.