RE: [GBlist] OSB

[JOHN SALMEN <terrain@shaw.ca>]

Here is some more information on OSB.

the drying of osb versus plywood was looked at in few CMHC studies. Here is
a link to one
http://www.cmhc-schl.gc.ca/publications/en/rh-pr/tech/01-139_e.html that
looked at envelope drying rates and the performance of different materials
in a test application. One of the results was "Panels with plywood sheathing
dried faster than comparable panels with OSB sheathing". Another CMHC study
for which I don't have an url looked at the drying of walls with ventilated
stucco cladding. In this study after a 5 month evaluation period both the
sheathing AND the framing in the plywood sheathed wall was drier than the
comparable OSB wall. I thought this was significant as it was looking at an
affectively rainscreened wall. The caveat was given that this result may
vary depending on the specific product used.



John Salmen

TERRAIN E.D.S.
4465 Uphill Rd.
Duncan BC
CAN  79L 6M7
250-748-7684
terrain@shaw.ca



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