Insulating a Rim Joist in Granby, CT

This homeowner in Granby, CT had called us out to his home because he wanted to stop dealing with his cold floors in the winter. To understand why this is happening we have to know that houses like many things are affected by pressure. In the attic there is a positive pressure and in the basement there is a negative pressure. When air comes into our home it comes in from a negative pressure zone. One of the main entry points is the rim joist. In the winter cold air rushes in through this zone and makes the floors above very cold.  To fix this, we have to insulate the rim joist. To do this we use a 2-part expanding spray foam. This allows us to get every inch of this space and air seal it properly. Once this is done the cold air cannot get into the basement to make the floors cold!