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I have been using some foil-faced polyiso…whatever (the organic stuff) foam board as radiant heat shields and also on the outside of some dormers and knee walls in a bonus room. I checked the manufacturers web site just to see what info they had available, and they warned that it should not be left exposed, that it should be covered by brick, plywood, or drywall to avoid “flame spread” problems in case of a fire.
While I am not subject to code inspections, this warning concerns me. Can any of you enlighten me on this? Rob, you’re a big proponent of foil-faced; has this ever come up??
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crusty.. this comes up all the time..
code says you can't leave it exposed..pain in the neck..
the minimum is 1/2 inch drywall over..
usually this would become a problem with me in the kneewall area of a cape..so now i apply the foil-face iso to the interior heated side where it will be covered with 1/2 inch gypsum anyway...
Branch River Foam is a franchise foam mfr. of R-Control eps..
the eps mfr's can give you a product that is treated in the process so it doesn't have to be covered..
they can also bond skins to it for special app's..
in my next crawl space i intend to spec 3inch eps with a cement board skin on the exterior walls so i can condition the entire crawl space.....
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I have been using some foil-faced polyiso...whatever (the organic stuff) foam board as radiant heat shields and also on the outside of some dormers and knee walls in a bonus room. I checked the manufacturers web site just to see what info they had available, and they warned that it should not be left exposed, that it should be covered by brick, plywood, or drywall to avoid "flame spread" problems in case of a fire.
While I am not subject to code inspections, this warning concerns me. Can any of you enlighten me on this? Rob, you're a big proponent of foil-faced; has this ever come up??