Insulating a Basement in Northfield, CT

This homeowner in Northfield, CT reached out to us online hoping to talk to us regarding basement ceiling insulation for her raised ranch. She had a home gym in the basement and it was much too cold for her in the winter months. Our Home Comfort Specialist came out to the home and noted that there was fiberglass insulation in the rim joist that simply needed to be replaced with spray foam. In a basement, the “rim joist” is the perimeter of the floor framing system along the exterior of the house. The joints and gaps between all the framing members allow for a lot of air leakage into the house. The rim joist is seldom insulated and never air sealed. Basement ceiling insulation, especially fiberglass batts, doesn’t stop the flow of cold air into the home. Results - cold floors, drafty, uncomfortable rooms, cold basement/lower level, higher heating and cooling bills and more condensation in the basement or crawl space in the summer.

We had the perfect solution for this customer. In this solution, we spray foam the rim joist in the basement in order to seal and insulate it. Two part expanding spray foam is installed on the rim joist and over the sill plate to seal all air leaks from the outside and insulate this important area of the home. Our spray foam has a high insulation value per inch of R7, and because it expands, it seals all cracks and gaps and joints where air from the outside enters the home. Results - warmer floors, less drafts, more comfortable rooms, the house is easier to heat and costs less to heat, less summertime condensation on cold basement surfaces.