Osb Vs Cdx Roof

Cdx is veneer plywood.

Osb vs cdx roof.

Because of this manufacturing process osb is at least half the cost of cdx plywood. Most construction sites will consider the use of either osb or plywood for the roof. Osd plywood osd and cdx plywood are both commonly found on construction sites because builders and contractors rely on both types of plywood to get the job done. New homes will usually see a few rainfalls before a roof is on and as.

Osb is a cheap imitation of cdx. It is made of wood chips and glue. Far too often i see osb sag between the trusses making your roof look wavy. Over the years i have seen claims for plywood decking delaminating which can cause squeeks and knocks between the ply s.

Each of these materials has its own unique properties and qualities and so each is used in specific applications. Osb does not do well when it gets wet. The roof deck is the surface underneath your roof and roofing underlayment. Cdx is best for sub flooring.

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. Although osb typically offers a higher shear rating which adds rigidity to your structure. My personal opinion is that osb performs well on the wall and floor but stick to cdx plywood on the roof. How do cdx and osb differ in performance.

Oriented strand board osb combines wood chips glue and resin into the shape of a sheet of plywood and bakes them together. Odds are that if you pass a housing development of wood framed houses it will have osb oriented strand board as exterior sheathing. Compared to cdx oriented strand board osb is made very differently. Cdx plywood is a construction grade type of plywood that is designed for exposure to the elements.

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 usually made of 4 by 8 sheets that should be 1 2 thick. Far too often i see osb sag between the trusses making your roof look wavy. We have used osb for some time now we use 5 8 on the roof 7 16 on the sidewalls all with plywood clips for strength and proper exspansion gaps however 3 4 t g ulc or cdx for floors stands up to the weather while building.

Cdx and osb are used for almost similar things but because they have different features one is better applied in some tasks and the other one on other tasks. When you count sub floors roofs and wall sheathing osb claims about 70 of the wood sheathing market in north america over plywood. It can withstand moisture for a brief period of time but may become warped and delaminated with consistent exposure to the elements. My personal opinion is that osb performs well on the wall and floor but stick to cdx plywood on the roof.

It is also used for roof sheathing.