I have a drafty and cold 2.5 storey house. Greensaver came in and opened up all the kneewalls on the third floor and properly insulated and air sealed them. They even found some new leaks (the closet was open to the ceiling) and sealed them up. Greensaver also blew insulation into the flat ceilings on the second floor and third floor. Insulation makes a lot of dust but the guys left the place spotless. They completed the job on time and on budget, and my house is now much warmer. With the government grants for insulation work and the savings in gas I think I will have paid it off by the end of the winter.