On 27 Oct 2004 10:17:52 -0700, Elmar wrote:
Heard that OSB is actually stronger than the three ply CDX. I don't
have the figures to back up that statement but I am sure a web search
would yield something for you!

Until it gets wet a few times. Also, think of how each will behave in
a fire; all that extra glue in OSB is a substantial additional fuel load.
A OSB and truss roof is an unsafe location for a firefighting crew, so
we won't go on one if the roof is badly involved. This limits
vertical ventilation, which limits fire attack options, which limits how
well the fire can be stopped before gutting the house.

For a buck a sheet, you might buy 'em 5 minutes longer on the roof, to make
the firefighting that much more effective. Better yet, lose the trusses
and use real rafters. Even without considering the World Trade Center,
truss construction kills more firefighters than anything else.

Dave Hinz