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Formeldahyde exempt plywood

Posted:
Thu Jul 01, 2010 10:54 pm
by dh
I always thought that US made plywood was manufactured in such a way as to creat formeldahyde emmissions so low it was not an issue, and labled formeldahyde exempt (read it somewhere on the net). I had a neighbor say that plywood labled as such was for out door use, and therefor not held to the same regulations as interior plywood.
Anybody know which one is true? I paid a little extra for the US made ply that was stamped formeldahyde exempt, did I mess up???

Posted:
Fri Jul 02, 2010 5:43 am
by Shadow Catcher
"Formaldehyde Regulations and Structural Wood Products
Structural wood products such as plywood and oriented strand board (OSB) are manufactured to meet stringent product standards, including Voluntary Product Standard PS 1-07 for Structural Plywood and Voluntary Product Standard PS 2, Performance Standard for Wood-Based Structural-Use Panels. Because wood products produced under these standards are designed for construction applications governed by building codes, they are manufactured only with moisture-resistant adhesives that meet Exterior or Exposure 1 bond classifications. These adhesives, phenol formaldehyde and diphenylmethane diisocyanate (MDI), are chemically reacted into stable bonds during pressing. The final products have such low formaldehyde emission levels that they easily meet or are exempt from the world’s leading formaldehyde emission standards and regulations: "

Posted:
Fri Jul 02, 2010 11:59 pm
by dh
Thanks, thats pretty much what I thought.