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Old 04-15-2010, 08:23 AM
whitetailhntr whitetailhntr is offline
 
Join Date: May 2008
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Quote:
Originally Posted by Grizzly Adams View Post
I've repaired shingled roofs of both kinds of materials. After a leak, the OSB ones were a lot more prone to needing replacement, than plywood and the damage was more extensive. Where weight is a consideration, plywood is about half the weight of wood chips and glue, and it doesn't eat saw blades either. The plus side of OSB is that the strenght isn't directional, like plywood. Also important to install OSB right side up, especially on a roof.

Grizz
Actually the axis of strength with osb is the same as plywood, it's just not nearly as flimsy in the off direction. Sheating comes with stamps indacating this so people use it properly. The saw blade thing I don't buy either, use good blades and they last plenty long. Guys that can't run saws are way harder on blades than any osb. You are right about the using the rough side up though...not fun on steep roofs when the "shiny" side is up.
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