My personal opinion is that osb performs well on the wall and floor but stick to cdx plywood on the roof.
Osb vs cdx plywood for roof.
Differences between osb and cdx for roofing plywood.
Because of its construction some manufacturers actually make larger sheets of osb.
My personal opinion is that osb performs well on the wall and floor but stick to cdx plywood on the roof.
Osb on the other hand stands for oriented strand board which is a cheaper version of cdx.
Cdx is veneer plywood.
My go to option for cabinets boxes and work tables surfaces is 3 4 birch plywood.
Osb does not do well when it gets wet.
Although osb typically offers a higher shear rating which adds rigidity to your structure.
How do cdx and osb differ in performance.
Although osb typically offers a higher shear rating which adds rigidity to your structure.
Major differences between osb and cdx.
The letters c and d represent the grades of either side of the plywood while x stands for exposure.
One of the major differences between osb and cdx plywood is how well each holds up against water.
Far too often i see osb sag between the trusses making your roof look wavy.
Cdx plywood is produced by gluing together sheets of veneer with each layer being glued the opposite grain to the one below it.
Going back to the x in cdx you may recall that it means exposure.
The result is a wooden sheet that is.
It is made of wood chips resin and glue cast and baked together to produce a cdx like sheet.
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 made of multiple layers of thinly cut solid sheets of wood that are pressed together.
Over the years i have seen claims for plywood decking delaminating which can cause squeeks and knocks between the ply s.
Far too often i see osb sag between the trusses making your roof look wavy.
Oriented strand board osb combines wood chips glue and resin into the shape of a sheet of plywood and bakes them together.
When you are boarding up for a big storm you should be using at minimum 1 2 cdx plywood.
It is usually made of 4 by 8 sheets that should be 1 2 thick.
This means that osd is the perfect choice for applications such as exterior wall sheathing and roofing.
Osb and plywood offer similar and sufficient performance in terms of strength and functionality though plywood is about 7 stronger the main difference between the two is how they handle moisture and oddly enough there are wildly varying conclusions from very reputable sources as to just how vapour permeable they are.
However you might find that osb can better suit your needs than plywood for the roof.
Both cdx plywood and osb tend to come in standard sheets of four foot by eight foot 4 8.
Now let s have a look at some of the main differences between cdx and osb as roofing plywood.
The roof deck is the surface underneath your roof and roofing underlayment.
