Barn: insulated! The insulation crew finished the entire job yesterday, and the results are pretty impressive. The blown-in fiberglass fills every last nook and cranny in the walls, which is how they manage to get such high R-factors. It was fun to watch them work; the modern materials and machines really made the job go fast.
For example, the netting was stapled up with hundreds upon hundreds of staples, at an average interval of about 2 inches. They did this with a staple gun that works like a machine gun – they just run it down a stud or rafter, and the staple gun spits out staples at a rate of 8 to 10 per second. When you see how many staples they put in, you'd think they spent days doing it – but it actually went very quickly.
Blowing the insulation in was also a fast job. A huge machine inside their truck has a hopper full of the raw fiberglass, and a large blower. When the installer presses a trigger on his “insulation gun”, this machine starts chopping and fluffing the fiberglass, then blowing it at high speed down a long flexible hose to his gun, where it fills whatever cavity he's working at that moment (see the last two photos below).
The bottom line: a three man crew installed top quality insulation in the walls and ceiling of a 4,000 sq. ft. barn in about 9 hours. That's darn fast!