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Re: GBlist: Recycled XPS

Marc Rosenbaum said:

>Please keep in mind that all of the extruded polystyrenes and urethane-based
>board stock products are blown with ozone-depleting chemicals, and as such,
>should be avoided when possible.  One major expanded polystyrene producer, AFM,
>has sent me plenty of literature showing how EPS can be used below grade
>(though I think I prefer mineral fiber board there) and on flat roofs.  I think
>the XPS/urethane producers have perhaps done a fear number on us about EPS not
>being adequate in these applications - any experience out there?
Most of the insulating concrete form systems that are gaining in popularity
so quickly are EPS--mostly high-density EPS at 1-1/2 or 2 pcf instead of
the 1 lb typical of "beadboard." That, in itself, indicates to me that EPS
can work well below ground.

Alex Wilson
Environmental Building News

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