R-value measures resistance to heat flow. Higher = better insulation. But it's only half the picture in our humid Tennessee climate.
What Tennessee Code Requires
Climate Zone 4A: R-49 attic, R-19+ walls, R-19+ floors over unconditioned space.
Why Air Sealing Matters More
An R-49 attic with air leaks performs like R-25. Seal first, insulate second.
Spray Foam's R-Value Advantage
Closed cell foam delivers true rated R-value plus air sealing in one material.
Considering Spray Foam for Your Chattanooga Property?
We install open-cell and closed-cell spray foam across the Chattanooga area. The right choice depends on the building — request a free estimate to talk it through.
Explore spray foam insulation in Chattanooga