Six things you'll feel once the foam is in
Spray foam isn't just insulation — it insulates and air seals in one step. Here's what that means for the people living in the house, with a tested number behind each claim that has one.
The six benefits
Lower energy bills
Fiberglass and cellulose slow heat down, but air still slips through the gaps around them. ComfortSeal expands on contact and seals around framing, wiring and penetrations, so it insulates and air seals in the same step, and the heating and cooling you pay for stays inside. How much you save depends on the house, the climate and what the foam replaces.
Even temperatures in every room
Freezing bedrooms over the garage and sweltering bonus rooms are air-leakage problems, not thermostat problems. A sealed envelope keeps conditioned air where it belongs, evening out temperatures from room to room and floor to floor — usually the first difference people notice.
Quieter rooms
NRC 0.75 and STC 39: those are ComfortSeal 500's tested sound numbers (ASTM C423 and ASTM E413). Its open cell structure absorbs sound instead of transmitting it, so street noise, plumbing runs and the movie room upstairs are the kinds of sound it takes the edge off.
Fewer drafts and less dust
ComfortSeal 500 tests at under 0.002 L/s·m² air leakage (ASTM E283), so less outdoor air — and the dust it carries — drifts in through the walls. A tight house needs planned ventilation, which your installer or HVAC contractor sizes. Occupants stay out during spraying and until the installer's ventilation period is over.
Moisture control and fungi resistance
ComfortSeal HFO closed cell foam is a Class II vapor retarder at 0.45 perms at 2 inches, and it shows no fungal growth in ASTM G21 testing. In humid climates and coastal construction, that slows vapor drive into the wall assembly.
Rigid and wind-uplift tested
Closed cell foam cures rigid and bonds to framing and sheathing; ComfortSeal HFO tests at 29.5 psi compressive (ASTM D1621) and 210 psf wind uplift (UL 1897) — a published figure for high-wind zones. It is thermal insulation, not a structural element.
How thick does the foam need to be?
Energy savings vary with the house, the climate and what the foam replaces, so we won't put a dollar figure on yours. What we can tell you exactly is the R-value each thickness delivers, straight from the IAPMO evaluation reports.
Open the R-value calculator →Published installed R-values
From Table 1 of IAPMO ER-974 (ComfortSeal 500) and ER-975 (ComfortSeal HFO). Higher R-values mean greater insulating power. Savings vary.
Find an Installer →Compared with fiberglass and cellulose
Batts and blown-in products slow heat, but air still moves through and around them at every stud, wire and pipe. Spray foam insulates and air seals in one layer: in a 3.5-inch (2x4) wall, ComfortSeal 500 is R-13 and ComfortSeal HFO is R-25 (IAPMO ER-974 and ER-975), and ComfortSeal 500 tests under 0.002 L/s·m² air leakage (ASTM E283). For R-value, air sealing, vapor control and sound side by side, with the DOE and IAPMO sources, read spray foam vs. fiberglass.
The higher the R-value, the greater the insulating power. Ask your seller for the fact sheet on R-values.
Benefits, backed up
Does spray foam really make a home quieter?+
Yes. ComfortSeal 500 open cell foam absorbs sound with a noise reduction coefficient (NRC) of 0.75 and a sound transmission class (STC) of 39 — a meaningful difference on busy streets and between rooms.
Does spray foam resist moisture and mold?+
ComfortSeal HFO closed cell foam is a Class II vapor retarder at 0.45 perms at 2 inches (ASTM E96), which slows vapor drive into the assembly, and the foam itself shows no fungal growth in ASTM G21 testing. Moisture control for the whole house also depends on the assembly design, drainage and ventilation.
Is spray foam worth it compared to fiberglass?+
Standard fiberglass batts provide roughly R-2.9 to R-3.8 per inch, or R-3.7 to R-4.3 per inch for high-density batts (U.S. DOE), and leave gaps and seams where air leaks through. In a 3.5-inch (2x4) wall, ComfortSeal gives R-13 (open cell) to R-25 (closed cell), air seals in the same step (ComfortSeal 500 tests under 0.002 L/s·m², ASTM E283), and carries a limited lifetime warranty on the foam on certified installs.
Ready to bring these benefits home?
Find a certified ComfortSeal installer for your project, or explore the two products that deliver all six benefits.