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Train building insulation.(hot and cold)
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Spray foam is a rapidly expanding polyurethane. It looks kind of like honey when it goes on, and in about 5 seconds it just pops out into foam. I'd go with it all the way around, you can always scrape it down and put a free-standing wall in front of it if you really want to, but it's not bad looking with a little paint sprayed on. It looks like Great Stuff or any spray foam you get at Wal-Mart, only a good applicator will put it on a lot smoother, especially the high density. <br /> <br />If you're doing Romex (get the 10 or 12 awg 2 conductor w/ground) wiring I'd put it up before you spray, surface mount in conduit could be kind of hard to do on the foam if you don't put a wall in front of it. <br /> <br />Greg
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