Wow , very happy here ,I called Seal Rite ,10/15/2011 got a free estimate ,and the next day they where insulating my attic ,,,they installed about 10 inches .my furnace works less as hard.the temperature is so much even through out the house. a lot warmer. i cant believe how much difference this made i expect the investment will pay for it self in about 1 year . i recommend this company to anyone .. Brian Matthews Papillion Ne .