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Atlas Insulation • Radiant Barrier & Attic Performance
Fi-Foil Insulation in South Florida
Fi-Foil insulation is a radiant barrier solution designed to reduce heat transfer from the roof into the attic, helping South Florida homes feel more comfortable while easing HVAC workload.
Comparing options? See blown-in insulation, open cell spray foam, closed cell spray foam, or rigid foam insulation.
Get a Fi-Foil quote
Tell us your attic type and square footage. We’ll confirm the best radiant barrier setup and installation approach.
Serving South Florida with performance-focused insulation upgrades.
What is Fi-Foil insulation?
Fi-Foil is a radiant barrier insulation product that reflects radiant heat rather than absorbing it. In hot, sunny climates like South Florida, radiant heat from the roof can drive attic temperatures up fast. A properly installed radiant barrier helps reduce that heat load.
Where Fi-Foil performs best
- Attics: Reduce radiant heat transfer from roof decking into attic space.
- Metal roofs and low-slope roofs: Where radiant gain can be intense.
- New construction: Installed cleanly during framing/roof stages.
- Commercial spaces: Warehouses and buildings with large roof exposure.
Real talk: Radiant barriers work best when installed correctly with proper placement and air space. We install it to perform, not just to “look done.”
Fi-Foil installation approach
- Attic evaluation: Ventilation, access, and roof structure check.
- Placement plan: Confirm best surface and orientation for reflection.
- Secure fastening: Tight, consistent attachment to avoid sagging.
- Penetration management: Clean work around wiring and fixtures.
- Heat-load pairing: Recommend supplemental insulation if needed.
- Final walkthrough: Confirm coverage and performance intent.
Fi-Foil vs other insulation options
| Option | Best for | Why it wins | Watch-outs |
|---|---|---|---|
| Fi-Foil (radiant barrier) | Attics and roof radiant heat reduction | Reflects radiant heat; great for sunny climates | Install quality + proper placement are critical |
| Blown-in insulation | Attic floors and large coverage areas | Strong thermal resistance when installed uniformly | Depth and consistent coverage matter |
| Spray foam | Air sealing + high performance assemblies | Air barrier benefits when installed correctly | Higher cost; requires controlled conditions |
Want to pair Fi-Foil with attic insulation? Consider blown-in insulation or open cell spray foam.
When Fi-Foil is the right call
Fi-Foil is a smart option when radiant heat is the problem you’re trying to solve. If your attic is baking and rooms below feel hotter in the afternoon, a radiant barrier can help reduce the load coming through the roof.
- Homes with intense afternoon sun exposure
- Attics with high radiant heat gain from roof decking
- Metal roof assemblies where radiant heat can spike
- Projects where you want a targeted attic performance upgrade
If you want a more traditional thermal insulation solution (not radiant), we’ll often recommend blown-in insulation depending on attic layout and goals.
Credible guidance on radiant barriers
Radiant barriers are widely discussed as a strategy to reduce attic heat gain in hot climates. The U.S. Department of Energy provides an overview of radiant barriers, how they work, and where they’re most useful.
Why Atlas for Fi-Foil
- Performance-first installs: Placement and fastening done to last.
- Cleaner work: Respectful crews and tidy job sites.
- Honest recommendations: We’ll tell you when another option fits better.
- Residential & commercial: Teams ready for different scopes.
Related insulation services
Fi-Foil Insulation FAQs
Quick answers before you schedule an attic radiant barrier install.