Attic Insulation – Insulating Cold Cantilevered Floors

In episode #62 of the On the Job video series, Larry Janesky, owner and founder of Dr. Energy Saver, walks us through a recently completed project to once again speak about an important subject previously discussed in other On the Job episodes: Cantilevered floors and how they can become a huge source of energy loss and discomfort when improperly insulated.
Cantilevers are architectural features common in raised ranch style homes, when the second floor is made slightly bigger than the floor beneath.
That small portion of the floor that is exposed to the outside air, when not properly air sealed and insulated will allow heat to be lost to the outside and cause air to leak through making the floors very cold and the room uncomfortable to be in. Unfortunately, most cantilevers are poorly insulated, with fiberglass insulation and lack air sealing.
In this project, Larry and his team chose to insulate the cantilever with spray foam due to the high R-value per inch and air sealing properties. Other equally efficient methods can be used that perform much better than fiberglass batts, including foam board insulation and dense packed cellulose insulation.
Dr. Energy Saver technicians will always evaluate each case individually and offer the best, most cost effective and least disruptive alternative to solve the problem.
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