Question 1

What is spray foam insulation and how does it work?

Accepted Answer

Spray foam insulation is a two-component polyurethane material that expands on contact to fill every gap, crack, and cavity in walls, attics, and roof decks. It creates an airtight seal blocking heat transfer, moisture, and air infiltration — making it the most effective insulation for South Florida's hot, humid climate. Therma Seal installs both open-cell and closed-cell spray foam from Icynene, Rockwool, Knauf, and Owens Corning.

Question 2

How much does spray foam insulation cost in South Florida?

Accepted Answer

In South Florida, open-cell spray foam costs $1.50–$3.50 per square foot, and closed-cell spray foam costs $3.00–$7.00 per square foot. A typical 1,500 sq ft home attic installation runs $3,500–$8,000. Therma Seal provides free, no-obligation written estimates for all projects in Miami-Dade, Broward, and Palm Beach counties. Call (561) 775-9703.

Question 3

How much can I save on my FPL bill with spray foam insulation in Florida?

Accepted Answer

Most South Florida homeowners see a 30–50% reduction in cooling costs after spray foam installation. The average savings is $1,200–$2,400 per year depending on home size. With installation paying for itself in 2–4 years, spray foam is one of the highest-ROI home improvements available to Florida homeowners.

Question 4

What's the difference between open-cell and closed-cell spray foam?

Accepted Answer

Open-cell foam (R-3.5–R-4/inch) is softer, more affordable, and excellent for sound dampening — ideal for interior walls and ceilings. Closed-cell foam (R-6–R-7/inch) is denser, acts as a Class II vapor barrier, and adds structural rigidity — perfect for attics, exterior walls, and moisture-prone areas in South Florida homes. For Miami-Dade, Broward, and Palm Beach homeowners, we typically recommend closed-cell for attics and open-cell for interior walls.

Question 5

Does spray foam insulation help during hurricane season in Florida?

Accepted Answer

Yes. Closed-cell spray foam bonds to structural components, increasing roof uplift resistance by 200–300% compared to uninsulated assemblies. It also prevents wind-driven rain infiltration. For South Florida homeowners facing annual hurricane risk from June through November, closed-cell spray foam is one of the best structural investments available.

Question 6

Does spray foam prevent mold in Florida?

Accepted Answer

Yes. Mold requires moisture to grow, and closed-cell spray foam eliminates moisture infiltration through the building envelope. It's one of the most effective mold-prevention measures available to Florida homeowners dealing with chronic humidity issues.

Question 7

Is Therma Seal licensed and insured in Florida?

Accepted Answer

Yes. Therma Seal Spray Foam Insulation is fully licensed and insured in the state of Florida. We are a Certified Gold Circle Icynene Dealer and have been serving Miami-Dade, Broward, and Palm Beach counties since 2007.

Question 8

How long does spray foam insulation last in Florida?

Accepted Answer

Properly installed spray foam insulation lasts 20+ years with zero maintenance. Unlike fiberglass that sags and loses R-value over time, spray foam maintains its performance for the lifetime of the home. It does not absorb moisture, sag, settle, or support mold growth.

Question 9

Does Therma Seal offer free estimates?

Accepted Answer

Yes. Therma Seal provides free, no-obligation estimates for all projects in Miami-Dade, Broward, and Palm Beach counties. We can typically schedule a same-day or next-day inspection. Call (561) 775-9703 or fill out our online form.

Question 10

What areas does Therma Seal serve?

Accepted Answer

Therma Seal serves the entire South Florida tri-county area including Miami, Miami Beach, Coral Gables, Hialeah, Homestead, Doral, Kendall, Aventura, Fort Lauderdale, Hollywood, Pembroke Pines, Coral Springs, Plantation, Davie, Weston, Sunrise, Miramar, Pompano Beach, West Palm Beach, Boca Raton, Delray Beach, Boynton Beach, Jupiter, Wellington, Lake Worth, Royal Palm Beach, Palm Beach Gardens, and Greenacres.