We have a Styrofoam plant not too far from me. They have huge blocks of Styrofoam. They will cut it any size you want. I could get 6” blocks cut that would fill the wall between the 2" 6" for insulating my solar green house.
Do you think this would be a good setup? I wonder what the R factor would be.
I found some info on it. It looks like EPS and they say it is R 3.1 to 4.3 per inch.
5 inches would give me about R 15.5 – 21.5 that sounds pretty good.
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