Spray Foam Insulation in Macon, GA

Spray foam insulation expands to fill the cavity it is sprayed into, sealing air leaks and insulating at once. In Macon, where summer humidity runs high for months, keeping outside air out of attics, walls and crawl spaces matters as much as R-value. Humid air that leaks in brings moisture and heat with it.

Closed-cell foam

Closed-cell foam is dense and rigid, about R-5 to R-7 per inch according to HomeGuide, and at enough thickness it slows water vapor. We use it under crawl space floors, on rim joists and in tight cavities where R-value per inch matters. HomeGuide lists it at $3.00 to $5.00 per square foot installed.

Open-cell foam

Open-cell foam is soft and expands a lot, about R-3.5 to R-3.7 per inch, and costs about $1.50 to $3.50 per square foot. It is the usual choice on the underside of the roof deck when ducts and the air handler sit in the attic, because it brings them into the conditioned space. The Department of Energy advises against open-cell foam below ground.

Where foam fits in Macon homes

• Attics with ductwork. Roofline foam keeps the equipment out of the hottest air.
• Crawl space floors. Closed-cell foam under the subfloor of homes on piers or with vented crawl spaces.
• Bonus rooms and kneewalls. Foam fills the slopes and kneewalls that batts never fit well.
• Rim joists. Closed-cell foam seals the band joist where the house meets the foundation.
• Additions and remodels. Foam in open stud bays.

Termites and inspections

Macon-Bibb rates termite risk as very heavy. Foam on foundation walls can hide termite activity, so we discuss inspection gaps and coordinate with your pest control company. We also explain what foam on the roof deck means for future home inspections, since it hides the sheathing. Get a free estimate