Uninsulated or inadequately insulated attics account for the most energy loss in a home, which speaks volumes about the importance of attic insulation and weatherization. Air sealing your attic will complement your insulation efforts, making your home run more efficiently.
Code requirements in our service area demand that attic insulation levels be at R-38. For an uninsulated attic, that would mean installing about 5-6 inches of spray foam.
For vented attics, moisture accumulation isn’t a significant concern, and you can insulate and air-seal your attic by applying open-cell spray foam on the floor. Doing so prevents air and thermal leakage from the attic to the living room and vice versa, improving your home’s energy efficiency.
In unvented attics, where moisture could be an issue, medium-density closed-cell spray foam can form an air, thermal, and moisture barrier to mitigate possible mold and mildew growth.
Mold issues would necessitate not only sooner insulation replacement but also poor indoor quality and respiratory issues.