Spray Foam
Insulate Addition With Spray Foam Project, Summer 2016. Knoxville,TN. $4.5K.
This customer had built a 740 sf addition to their home, using advanced framing techniques and installing energy-efficient windows and doors. Their goal was to make the addition as energy efficient as possible by also installing spray foam insulation.
First, the area was prepared by masking off doors and windows to protect them from overspray. Then, 2 inches of closed cell spray foam was applied to the wall cavities, to achieve R-14. This was followed by installing 6 inches of open cell foam in the roof cavities, to achieve R-22.
Due to the air sealing qualities of spray foam, the true insulating value of these materials is somewhat better than these ‘prescriptive’ R-values, which were established for more traditional insulation materials such as fiberglass and cellulose. This addition will be very comfortable and easy to heat and cool during every season as a result.