The best attic insulation for a Chattanooga home depends on whether you have ductwork up there, how much headroom there is, and your budget. For most homes, the answer is one of three: spray foam at the roof deck, blown cellulose on the attic floor, or a hybrid.
Option 1: Spray Foam at the Roof Deck
Open cell spray foam at 5-7 inches creates a conditioned attic. This is the right call when you have HVAC equipment or ductwork in the attic. It eliminates 30-40% of energy loss from leaky duct boots and stops the 140°F summer attic that radiates heat into bedrooms.
Option 2: Blown Cellulose on the Attic Floor
The most cost-effective option for homes with no equipment in the attic. We air seal the ceiling plane first, then blow R-49 of dense-pack cellulose. Comfort and bill changes are noticeable within the first month.
Option 3: Hybrid (Closed Cell + Blown-In)
A thin layer of closed cell foam at the roof deck for air sealing, topped with blown cellulose for R-value. Excellent performance, lower cost than full spray foam.
Recommended R-Value
Chattanooga sits in DOE Climate Zone 4A. Recommended attic R-value is R-38 to R-60. Most pre-2000 homes have R-19 to R-25 — well below modern recommendations.
Get an Attic Inspection
We measure existing R-value, check for air leaks, and provide a written quote with options at multiple price points. Call 423-464-7464 or request a free estimate.