Quick answer: Spray foam insulation in Duluth costs $1.00–$1.60 per board foot for open-cell and $1.60–$2.60 per board foot for closed-cell. Most homeowners pay $3,000–$8,500. Most jobs finish in one day. Final pricing depends on access, required thickness, and any removal of existing insulation.
We’ve installed spray foam in hundreds of Gwinnett County homes, from Sugarloaf to downtown Duluth. You need a solution that handles hot summers and humid air, not a generic insulation job. Here’s what that means for your home.
Why Duluth Homes Need Spray Foam
Duluth’s 1990s subdivisions and newer builds often have outdated insulation or none at all. With IECC Zone 3A’s mixed-humid, cooling-dominated climate, the real enemy is not cold but moisture and heat gain. Open-cell and closed-cell spray foam seal air leaks, reduce attic temperatures, and block humidity from entering crawl spaces and walls. This is especially important for the region’s slab and crawl-space homes. In the summer, that unsealed attic can become a 140°F oven, and that heat migrates down into your living space.
Our Spray Foam Services in Duluth
We start with attic air sealing using open-cell foam. It’s ideal for insulating and sealing conditioned spaces like attics and ducts. For crawl spaces, we use closed-cell foam at ~R-7 per inch to form a moisture barrier. We also work with new construction and townhome builders to integrate spray foam from the start, ensuring long-term efficiency.
Closed-cell foam is the best choice for crawl spaces in Georgia. It prevents mold and rot by sealing out the high humidity that seeps in through the ground. Open-cell is better for attics, where it insulates while allowing some vapor movement. We always do a full inspection before starting to understand what your home needs.
What It Costs in Duluth
For a typical 1,500 sq ft attic, closed-cell foam costs $3,000 to $6,750, while open-cell is slightly less. Crawl space encapsulation with closed-cell foam averages $2,400 to $5,400, depending on size and condition. Combined attic and crawl space jobs can range from $3,000 to $8,500. These prices are based on access, thickness required, and whether we need to remove old insulation.
Georgia Power offers rebates for energy-efficient upgrades, but the amounts vary each year. We can help you apply and track those rebates.
Serving Duluth and Gwinnett County
We work in the areas you know best: downtown Duluth, Sugarloaf, Berkeley Lake, and across Gwinnett County. Whether you’re in a newer build or a 1990s townhome, we tailor our work to the local climate and housing stock. We handle everything from single rooms to full-home encapsulation. You can trust us to show up on time, work cleanly, and explain every step along the way.
