First, wear awesome Tyvek Suit. Oh, and hook up hose, gun, and put on gloves and goggles. We started in the master bedroom closet to “practice”.
Second step- start spraying!
Third step- keep your finger on the trigger! If you stop for more than 30 seconds, the gun gets clogged and you lose.
Step four: don’t touch the foam- it expands quickly and gives off a ton of heat.
Yep that’s pretty much it. Repeat on all exposed brick walls for an R Value of 7 per inch.