Radiant barrier in Boca Raton: is it worth it?

SFL Attic is a guide run by Terragroupe, LLC. We do not install anything and we are not booking jobs yet.

A radiant barrier is worth a look in Boca Raton mainly when your attic insulation is thin. FSEC puts the Southeast cooling-cost gain at 8 to 12 percent a year ¹, and the gain fades as insulation rises. Boca Raton has no weather station of its own, so this page uses the nearest one.

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SFL Attic is a guide run by Terragroupe, LLC. We do not install anything and we are not booking jobs yet.

Last reviewed October 18, 2026 against the cited sources. A guide, not legal, tax or engineering advice.

Updated October 18, 2026. Sources

Radiant barrier in Boca Raton: local facts

Verified facts only. Each one links to its source and shows the source's date.
Fact	Value	Source
Annual cooling degree days (base 65F), Pompano Beach Airpark (USW00092805), the nearest NOAA 1991-2020 normals station, about 8.5 miles south of Boca Raton in Broward County; Boca Raton has no station of its own, 1991-2020 normal; cooling load is what a radiant barrier acts on	4,607.7 CDD	[2] 1991-2020
Average days per year with a high of 90F or more, Pompano Beach Airpark (USW00092805), the nearest NOAA 1991-2020 normals station, about 8.5 miles south of Boca Raton in Broward County; Boca Raton has no station of its own, 1991-2020 normal	59.4 days/year	[2] 1991-2020
Cooling degree days June through September (sum of monthly normals), Pompano Beach Airpark (USW00092805), the nearest NOAA 1991-2020 normals station, about 8.5 miles south of Boca Raton in Broward County; Boca Raton has no station of its own, 1991-2020	2,249 CDD	[3] 1991-2020

Why this page borrows Pompano Beach numbers

NOAA has no normals station inside Boca Raton. The nearest is Pompano Beach Airpark, in Broward County to the south. The figures below belong to that station, not to Boca Raton itself.

Cooling degree days a year: 4,607.7 CDD² at Pompano Beach Airpark (1991-2020 normals).
Days a year at 90F or higher: 59.4 days/year² at the same station.
June to September together: 2,249 CDD³ (a four-month total we added up, our arithmetic).

We have no sourced distance from the station to the city, so we print no mileage.

Boca Raton is mostly eighties and nineties homes

The median Boca Raton unit was built in 1983⁴. By 1989, 69 percent⁴ of units were standing, and 81.4 percent⁴ by 1999.

Only 43.6 percent⁴ predate the spring of 1979, when Florida's statewide ceiling rule began: R-19 R-value⁵. Newer homes were built under that rule, so they may start with more insulation than an older attic does (our inference).

That matters for foil. FSEC says its benefit shrinks as insulation rises ¹. For many Boca Raton homes, the case for foil is weaker than for a bare attic. A measured depth settles it.

Older ZIP area, newer ZIP areas

ZIP area 33486 is the older end, with a median build year of 1977⁶. In it, 58.8 percent⁶ of units date to 1979 or earlier.

ZIP areas 33496 and 33498 are the newer end, with a median of 1991⁷. Only 5.6 percent⁷ and 5 percent⁸ of their units go back that far.

ZIP areas are Census approximations. Use them to guess where to look first.

Compare your attic with the new-home minimum

As of October 18, 2026

A new Boca Raton home needs a ceiling minimum of 30 R-value⁹. Use it as a yardstick. FSEC says that near R-30, very little heat flow is left for foil to cut ¹. In that case, skip it.

FSEC also warns about condensation if foil lies directly on insulation ¹. Ask the installer how the attic will breathe once the foil is in.

Permit and HOA questions

As of October 18, 2026

The City of Boca Raton's permit guide does not mention insulation or radiant barrier. Ask the building division whether your job needs a permit.

Many Boca Raton homes sit in an HOA or condo community. Ask about roof and attic access before a crew comes.

What it costs

We found no credible recent price for radiant barrier in South Florida, so we do not print one. Compare bids by price per square foot and square feet covered.

Next step

Ready to check? Use the Attic Heat Score for a quick read online.

National price ranges for radiant barrier

These are national ranges from the cited sources, not local quotes. Ranges are labeled with their source, or marked our arithmetic. Your price depends on the job.
Job	Range	Source
Angi: contractors charge between $0.60 and $1 per square foot to install both foil and spray-on radiant barriers.National range from a price guide, not a local quote.	0.60-1.00 USD per sq ft installed	[10]National price guide range, How Much Does a Radiant Barrier Cost to Install? [2026 Data] (Angi), October 2026
Angi: professional radiant barrier installation costs between $710 and $2,840 for the project.National range from a price guide, not a local quote.	710-2840 USD	[10]National price guide range, How Much Does a Radiant Barrier Cost to Install? [2026 Data] (Angi), October 2026

What this site gives you now

This guide is built to remove guesswork, so you can decide from a straight answer with no pressure.

A way to size up your attic
The Attic Heat Score shows how likely new insulation is to help. Then find the type of insulation, how deep it is and what needs fixing first.
Prices you can compare
Price ranges come from named national guides, each with its source. Ask any installer for the scope, the product and the price in writing. Nothing should start until you say yes.
The right product for your house
Blown-in when it is enough. Spray foam only when it fits your roof and your budget.
A photo habit
Take photos of the attic before and after any work, with a ruler for depth, so you can see the result.
The rebate rules
FPL pays a rebate only when your existing attic insulation is thin. The cost guide explains the rules, so you can see whether you may qualify.
What to ask for in writing
Ask any installer to put the workmanship term in your written scope: what it covers and how long it lasts. We will publish an installer's term on this site if one signs.

This site is free to read. It sells no work and takes no payment. If your attic does not need work, the guides and the score will say so. Any work is agreed in writing between you and the installer who does it.

Attic Heat Score

Answer a few quick questions. The score shows how likely your attic is to benefit from more insulation. It is a starting point; a measured depth confirms it.

Start the Attic Heat Score

SFL Attic is a guide run by Terragroupe, LLC. We do not install anything and we are not booking jobs yet.

More attic work in Boca Raton

Questions people ask

Is Pompano Beach weather the same as Boca Raton weather?

Close, but not identical. It is the nearest NOAA normals station, and we label it that way. We picked it by comparing station and city-center coordinates, so treat it as a guide.

Radiant barrier or more blown-in for my Boca Raton attic?

If the layer is thin, more blown-in adds R-value, while foil only reflects heat. Ask for both priced. Our cost guide shows what price guides say blown-in costs.

My Boca Raton home was built in the nineties. Should I still ask about foil?

You can ask, but measure first. A home from that time was built under the statewide ceiling rule, so the attic may already hold a fair layer. We found no survey of real attic R-values by year built, so we do not guess.