OSB or Plywood?


Old 01-15-09, 12:48 PM
Thread Starter
Join Date: Jan 2009
Location: portland, oregon
Posts: 12
OSB or Plywood?

Putting cost aside,would you rather use OSB or Plywood as an underlayment for hardwoods and/or carpet? I've read conflicting reports, some saying there interchangable and basically perform the same, and other reports saying plywood is better hands down. What's your experience and/or opinion?
Sponsored Links
Old 01-15-09, 01:09 PM
Join Date: Aug 2000
Location: USA
Posts: 15,834
Most will tend to tell you that plywood is preferred over OSB. But, OSB sheets tend to be more square and dimensionally stable than plywood, according to contractors. There are no soft spots like those than can sometimes be found in plywood. OSB is stronger. The ability to hold nails, staples, cleats is about the same for plywood and OSB. And, it's less expensive.

But, because OSB is made of wood chips, wax, and glue, when it gets wet, it will swell. If home is dry, well ventilated, and OSB properly installed this tends not to be a problem. If installed over wet crawl space or basement or if you have a plumbing leak, then, you will wish you had installed plywood.

OSB is fine for under hardwood flooring and carpet. Do not use under ceramic tile. You need concrete underlayment board (CUB) for that. If you have an area where you think you might want ceramic tile in the future, you may want to consider going ahead and installing CUB.

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Thread Tools
Search this Thread
Display Modes