Spray foam went in last week. This stuff is as fascinating as it is effective. The installer (the guy in the space suit in the first photo) has a spray gun that is attached to two long hoses that go all the way back to his truck. He also required a 6-guage 3-wire cable that ran all the way from his truck to a 50-amp breaker that he wired directly to our electrical service panel. The truck has two fifty gallon drums of the "A" part and the "B" part, which are pumped through a heater and then pumped to his gun. The two parts mix as the stuff hits the wall cavities, and the mixing "creates" the foam. But to actually see it happen, it looks like magic. The guy sprays what looks like a clear liquid onto the wall -- it doesn't look like a foam at all. Then, a few seconds later, foam "grows" from the spot he just sprayed, like an organic fungus in a stop-motion time lapse movie from a nature show. It's the weirdest stuff!
The stuff is hard to the touch within minutes, and all of the over-spray can be cut back to the plane of the studs at that point. I don't have a photo of that, but they had reciprocating saw with a 2-foot long knife on it for that part of the job. It took them two-and-a-half days to spray the whole house at a cost of $5,800. It looks awesome... too bad the drywall is covering it all up now (photos of that soon).
The foam is noxious stuff, so this guy had a breathing apparatus that was attached to an air compressor outside with a filter on it. The foam stunk for a day or so, but apparently does all of its outgassing within the first couple hours.
pillows of uncut foam
foam after it was cut
photo taken from the living room toward the kitchen
master bedroom
