I used JB insulation to blow in some insulation a few months ago after my general contractor recommended them to me. What a huge disappointment! My house was wrapped in Tyvec, so when the JB insulation people came, instead of removing the staples and lifting up the tyvec to drill their holes, they cut the tyvek the whole way around the house in a 2 foot horizontal strip. Needless to say, the tyvek had to be replaced at a cost to me of $350 bucks. Stupid... even worse, they missed a whole section of my house which was revealed by an infrared camera. They had to come back out to fix it... But wait, it gets better. When they removed some of the tyvec they only put in a couple staples to hold it in place - so when the wind picked up, it tore off the house and then I had to take out the ladder in the dark while it's raining hard so I could staple the tyvec back up to protect my house. Needless to say, I would never use these guys again and I'd recommend you to find someone else to do the work.