[Greenbuilding] [BULK] FW: Plywood Off Gassing

[Keith Winston]

Actually, the OSB industry says that all OSB is now made with phenol 
formaldehyde glue, for a few years now. I THINK I've heard that the same 
is true for interior plywood, but I'd be very interested in verification 
of that. But there's a lot of old information floating around, so I'm 
not sure where to find this, and don't have the time for a research project.

Keith


John Messerschmidt wrote:
> Lawrence,
> I read about using exterior plywood in the last month on-list, and will
> definitely use it from now on.  First though, I have to use up the few
> boards I have.  I could buy AFM Safecoat Safe Seal and Hard Seal, but I was
> wondering if paint or poly would do as a sealant, short term.  I'm a
> contractor, educating conventional architects and clients, and would like to
> give them some practical choices.
>
> Also, I've heard people mentioning a long or short "curve" - meaning a graph
> showing how much VOC's diminish over time for certain products.  Where could
> I find these curves?  Wouldn't it be interesting and useful information?
>
> Thanks
>
>
>
> -----Original Message-----
> From: Lawrence Lile [mailto:LLile at projsolco.com] 
> Sent: Thursday, October 19, 2006 4:49 PM
> To: John Messerschmidt; greenbuilding at listserv.repp.org
> Subject: RE: [BULK] [Greenbuilding] FW: Plywood Off Gassing
>
> Plywood and chipboard with exterior based glue do not offgas
> signifigantly.  I'd spec exterior glue materials even on the interior.
> The interior stuff uses urea formaldehyde, but the exterior stuff uses
> phenol formaldehyde that the USGBC says doesn't cause much IAQ problem.
> You might research this with your particular supplier to learn more -
> suppliers are catching on and reacting.  
>
> All off-gassing materials start off heavy and diminish over time.
> Another poster has recommended some sealants, but I say it is better to
> eliminate the source.  
>
> --Lawrence Lile
>   
>
>
>
>
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-- 
Keith Winston
Earth Sun Energy Systems
3927 Madison St.
Hyattsville, MD 20781
301-980-6325
keith at earthsunenergy.com
www.EarthSunEnergy.com