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Why Spray Foam

What ThermoSeal Does for Your Home

Fiberglass batts slow heat transfer. Spray foam stops air movement entirely, the real cause of high energy bills and uncomfortable rooms.

Energy Savings Up to 50%

By sealing every crack, gap, and penetration, ThermoSeal eliminates conditioned air loss, the #1 driver of high heating and cooling costs.

Year-Round Comfort

No more hot upstairs, cold basement, or rooms that never feel right. A proper air seal creates consistent temperatures throughout your home.

Moisture & Mold Protection

ThermoSeal closed cell foam acts as a vapor barrier, blocking moisture intrusion in crawl spaces, basements, and exterior walls before mold can take hold.

Quieter Home

ThermoSeal open cell foam (NRC 0.75) dramatically reduces sound transmission through walls: traffic, neighbors, and outdoor noise stay outside.

Lifetime Warranty

ThermoSeal spray foam is designed to outlast the building. Our lifetime warranty gives you peace of mind that your investment is protected, permanently.

Higher Home Value

An energy-efficient home with lower utility bills, better air quality, and a transferable lifetime warranty commands a premium at resale.

Product Guide

Which ThermoSeal Is Right for Your Home?

Two types of spray foam for different applications. Your certified installer will recommend the right product based on your home's needs.

Open Cell

ThermoSeal 500 & 800

R-4.1 to R-4.5 per inch  ·  Water Blown  ·  GWP 1

Light density open cell foam that expands up to 100x. Excellent sound dampening (NRC 0.75), air impermeable, and totally water blown with zero ozone-depleting substances. IAPMO ER-0603 certified.

  • Interior walls and attics
  • Cathedral ceilings
  • Floor cavities between levels
  • Sound control applications
  • Basement rim joists (above grade)
Closed Cell

ThermoSeal HFO

R-7.4 per inch  ·  HFO Blown  ·  GWP 1

Medium density closed cell foam that adds structural strength, acts as a vapor barrier (0.86 perms at 1.37"), and provides the highest R-value per inch available. Wind uplift rated to 286 mph. IAPMO ER-0698 certified.

  • Crawl spaces and basements
  • Exterior walls and roof decks
  • Areas exposed to moisture
  • Unvented attic assemblies
  • Homes in hurricane or high-wind zones
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The Process

What to Expect from Installation

A typical residential spray foam installation is fast, clean, and minimally disruptive. Here's how it works.

1

Free Consultation

A certified ThermoSeal installer assesses your home, identifies air leakage areas, and recommends the right products for your needs and budget.

2

Preparation

The work area is masked and ventilated. Occupants vacate for the day of application. Most jobs take 1–2 days from start to finish.

3

Application

Your installer sprays ThermoSeal directly onto surfaces. Open cell expands up to 100x. Closed cell reaches full density in seconds and sets firm.

4

Cure & Return

Foam is fully cured within 24 hours. You return to a tighter, quieter, more comfortable home, and start saving on your energy bills immediately.

The Average Homeowner Saves $600–$1,200 Per Year

Spray foam seals the air leaks that fiberglass batts can't, and air infiltration is the primary cause of energy loss in most homes. The average payback period is 3–5 years, after which the savings continue indefinitely. Actual savings vary by climate, home size, and existing insulation.

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50%
Max Energy Reduction
3–5
Year Payback Period
R-7.4
Max R-Value Per Inch
Life
Time Warranty
Common Questions

Homeowner FAQ

Everything you need to know before insulating your home with ThermoSeal.

Homeowners typically see energy bill reductions of 30–50% after insulating with ThermoSeal spray foam. Spray foam creates an air-tight seal that stops the conditioned air loss responsible for the majority of heating and cooling costs. Results vary based on home size, climate, and existing insulation, but spray foam consistently outperforms fiberglass and cellulose.
Most residential projects fall between $3,500 and $12,000 depending on the areas treated, foam type (open vs closed cell), and thickness required. An attic-only project is typically at the lower end; a full building envelope at the higher end. With 30–50% energy savings, a typical project pays for itself in 3–5 years. See our full spray foam cost guide, then request a free quote from a certified installer; that's the only way to get an exact number for your home.
The highest-impact areas are: attic (including roof deck and rim joists), exterior walls, crawl spaces, basement rim joists, and around windows and doors. ThermoSeal open cell (500 or 800) is ideal for attics, interior walls, and sound dampening. ThermoSeal HFO is best for crawl spaces, basements, and exterior applications where moisture resistance matters.
Yes. Studies show spray foam insulation increases home resale value by making the home more energy efficient, a key factor for buyers. A properly insulated home with lower utility bills, better comfort, and improved air quality is a documented selling point. ThermoSeal's limited lifetime material warranty is transferable to new owners, adding further value.
ThermoSeal spray foam is designed to last the lifetime of the building. Unlike fiberglass batts, which sag, settle, and lose R-value over time, spray foam adheres permanently to the substrate and does not degrade. ThermoSeal backs the foam itself with a limited lifetime material warranty when installed by a certified contractor.
Yes. Once cured (typically 24 hours after installation), ThermoSeal spray foam is inert and safe for occupants. During installation, the area must be vacated. ThermoSeal products are water blown (open cell) or HFO blown with a GWP of 1, with no ozone-depleting substances. All products are IAPMO certified and Class 1 rated per ASTM E 84.
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Ready to Lower Your Energy Bills?

Connect with a ThermoSeal certified installer in your area for a free assessment and quote. No obligation.

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1-800-853-1577