Reusing XPS Insulation – it stinks!
In an attempt to be more green as well as save some money we purchased a good amount of used Agtek Foamular XPS 1.5″ insulation from a farmer who pulled it from a series of barns he was tearing down. This came in 4′ x 21′ sheets and was about 15 years old. It is in good physical shape and the plan was to use it under the slab as well as anywhere else we can. Here is the problem: it smells terrible. It was used to line the roof of chicken barns – no ground contact or anything else but it still smells like the inside of a huge chicken coop after several months on the lot. We were hoping the smell would dissipate a bit but it’s just not happening in any measurable way.
Have other people reusing insulation run into this? Is there something we can do to get rid of the smell without damaging the insulation? If it’s used only under the slab and with a good vapor barrier (SteggoWrap was our plan) will we be fine? If we can use it only under the slab, that would be fine by me but the smell is strong enough that I’m really starting to get nervous about putting it anywhere in the project.
Any suggestions or thoughts would be appreciated. Thanks!
GBA Detail Library
A collection of one thousand construction details organized by climate and house part