I've got an old house and after doing an Eco Audit on my home, found out my attic was full of moldy insulation with tons of heat leaking out through a non-insulated hatch. I had various estimates from insulation companies but I really trusted the advice of All Weather Insulation and hired them to do the job. They spent a day removing all the old moldy pink stuff and did an excellent job cleaning it all out. Then they came another day and put a layer of spray foam on the attic. The downside is you have to find other accommodations for a day since it's toxic when they spray it so my wife and cats and I had to stay at a friends place for the night. The upside is that this stuff really works. You can walk on it like a floor. You don't need all these layers of the pink insulation and it seals every little hole. All weather also built a nice magnetic sealing hatch to stop the heat from escaping and installed proper venting in my attic to make sure the air flows. The foreman Andy was extremely nice and great to work with with. I really trusted his opinion. The result after a year is my heating bills have gone way down and my upstairs bedrooms are nice and warm in the winter and cool in the summer. I highly recommend going the spray foam route and highly recommend All weather insulation. It will save you money in the end