Radiant Foil & Blown-In Insulation in Gainesville, FL
radiant heat barrier blocks up to 95% of radiant heat. Combined with blown-in fiberglass insulation at R-38 to R-60 — the most cost-effective energy upgrade available for Florida homes.
How Radiant Heat Foil Actually Works
Heat moves in three ways: conduction, convection, and radiation. Standard insulation handles conduction and convection well, but radiant heat — the energy that travels directly from the hot roof deck toward your ceiling — requires a reflective barrier to stop it. Radiant foil underlayment is installed directly beneath your shingles or metal panels and reflects that radiant energy back outward before it can enter the attic space. Godwin uses radiant heat barrier underlayment rated to block up to 95% of radiant heat.
What a 30-Degree Attic Reduction Means in Practice
An unventilated Florida attic in July can reach 150°F to 160°F. With radiant foil underlayment installed, that same attic may sit at 120°F to 130°F — a reduction of 30 degrees or more. That 30-degree difference means your ceiling is radiating significantly less heat into your living space, your air conditioner runs less frequently, and your HVAC system experiences less wear over time. Combined with proper ventilation, radiant foil is one of the most cost-effective upgrades available for existing and new roofs in North Central Florida.
Blown-In Fiberglass Insulation
Blown-in fiberglass insulation fills gaps and irregular spaces that batt insulation cannot reach, creating a more even thermal barrier throughout the attic floor. ENERGY STAR recommends an R-value of R-38 to R-60 for attics in Florida's hot climate zone. Blown-in installation allows Godwin's team to achieve the exact R-value your attic needs without cutting or fitting — a cleaner, faster installation with better coverage results.
Foil & Insulation Specifications
| Specification | Detail |
|---|---|
| Foil Product | Radiant Heat Barrier Underlayment |
| Radiant Heat Blocked | Up to 95% |
| Attic Temp Reduction | Up to 30°F |
| Insulation Type | Blown-In Fiberglass |
| R-Value Range | R-38 to R-60 |
| Florida Standard | ENERGY STAR recommended R-value |
| Works With | Shingles and metal roofing |
| Can Be Added Without Re-Roofing | Yes (blown-in insulation) |
| Deposit Required | None |
| Workmanship Warranty | Transferable |
Frequently Asked Questions
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Christopher Tenney personally handles every estimate. License CCC#1329478. No deposit required.
Godwin Green Roofing | Gainesville, FL | License CCC#1329478 | Updated June 2026