Should I Use Osb On My Roof

Based on those explanations it is clear that both plywood and osb have their own strength and durability.

Should i use osb on my roof.

Both the national roofing contractors association and the asphalt roofing manufacturers association recommend the use of osb for roof sheathing as long as it bears the approval stamp of the apa. Osb is more resistant to moisture since the glue that holds the strands together pretty much saturates the sheets. For a decking or substrate underneath shingles you can usually use either material. Plywood has better performance when it comes to overall durability.

Plywood is a bit more expensive but is usually stronger and is often selected in cases where the roof covering is heavier such as for slate clay or concrete tile roofs. Osb is lightweight relatively inexpensive and strong enough to resist bending or breaking should someone walk on the roof. It can withstand moisture for a brief period of time but may become warped and delaminated with consistent exposure to the elements. Cdx plywood is a construction grade type of plywood that is designed for exposure to the elements.

Both of them are great for roofing. Most construction sites will consider the use of either osb or plywood for the roof. Oriented strand board commonly referred to as osb is a type of engineered lumber similar to particle board formed by adding adhesives and then compressing layers of wood strands. A homeowner recently wrote and asked me the following regarding osb roof decking.

In my case i planned to use osb on the sides and roof asphalt shingles up top and vinyl siding on the sides. Based on the information above it seems it would work fine. This is why plywood has better score in the screw holding ability compared to osb. However osb is a lot cheaper and more affordable to buy.