Inspected a 1 yr old roof on an older home. The rear roof decking was replaced by the roofer. There is noticeable sagging in the new roof decking.
Both the old and new roof decking is 4’ 8’ Canadian made wafer board or as I call OSB board.
Craig; How could you tell if this Product was Canadian made, just curious.
The new sagging roof decking has much smaller strands of wood chips than the older front decking. There was no rating stamped on this newer decking.
I would think that since the new sagging decking has no stamp, it could not be made in Canada. Maybe Easton, Maine? It would have had a stamp. No stamp, could indicate that it was not intended or designed for this use.
What steps are needed to prove this new roof decking is inferior or under sized for the application?
I would simply note that is no Identification stamp on the new product and might not have been rated for this use of installation and should be further evaluated by a Licensed Contractor.
Is the absence of a rating enough? Do they print ratings on both sides of the boards? Is there a a guide to measure the wood chip fragments and make a guesstimate?/quote)
Not that I am aware of, but that will be updated by someone.
Very interesting topic Craig, and hope someone else will show some light in this.