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Service Areas
NJ Spray Foam LLC insulates homes and commercial buildings from its base in Hull, GA. Pick Hull or your county to see the Georgia energy-code minimums that apply there, the homes we see most and the residential, attic and crawl space, retrofit and commercial spray foam services available.
Where we work
Each page covers the Georgia energy-code minimums for its climate zone, the homes we see most there and the services available.
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Madison County
Hull is a small Madison County town known as "The Well City", surrounded by farmland, wooded lots and homes on larger parcels. Houses range from older farmhouses to 1990s and newer builds, alongside barns, shops and poultry houses.
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Gwinnett County
Gwinnett is Georgia's second most populous county, close to a million residents, with sixteen cities and large unincorporated areas built out from the 1980s onward.
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Coweta County
Coweta County sits southwest of Atlanta along I-85, mixing the growing city of Newnan, small historic towns like Senoia and Grantville, and rural land with farms and shops.
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Dawson County
Dawson County is a North Georgia mountain county with one city, Dawsonville, plus lake communities on Lanier, mountain homes toward Big Canoe and Amicalola Falls, and newer subdivisions along GA-400.
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Bryan County
Bryan County runs from the coast at Richmond Hill to rural Pembroke, the county seat, with Ellabell and the Hyundai Metaplant in between.
Service Areas
Go straight to the page for your project. Each one covers the code minimums, the homes we see in that city and answers to common questions.
Local rules
Georgia's energy code is statewide, but the climate zone changes by county, and with it the crawl space rules. Values from the Georgia DCA amendments to the 2015 IECC.
| Area | Rule | Limit |
|---|---|---|
| Hull City of Hull, Madison County | IECC climate zone | 3A (warm, humid) |
| Unvented crawl space walls | R-13 cavity or R-5 continuous | |
| Gwinnett County Gwinnett County and its cities | IECC climate zone | 3A (warm, humid) |
| Unvented crawl space walls | R-13 cavity or R-5 continuous | |
| Coweta County Coweta County and its cities | IECC climate zone | 3A (warm, humid) |
| Unvented crawl space walls | R-13 cavity or R-5 continuous | |
| Dawson County Dawson County and the City of Dawsonville | IECC climate zone | 4A (mixed, humid) |
| Unvented crawl space walls | R-13 cavity or R-10 continuous | |
| Bryan County Bryan County and its cities | IECC climate zone | 2A (hot, humid) |
| Unvented crawl space walls | No prescriptive R-value in zone 2 |
What we install
Open-cell and closed-cell spray foam for new and existing homes, applied to roof decks, exterior walls, rim joists and floors so the house is insulated and air-sealed in one step.
Insulation and air sealing for the two places Georgia homes lose the most comfort: the attic above and the crawl space below, with spray foam, blown-in insulation or both.
Spray foam upgrades for homes and buildings that are already finished: we remove what is not working, seal the leaks and add foam where it can be reached without tearing the house apart.
Spray foam for metal buildings, shops, barns, warehouses and public buildings, from closed-cell foam on steel panels to open-cell foam on wood-framed commercial roofs.
We are based in Hull, GA and serve four counties: Gwinnett County, Coweta County, Dawson County and Bryan County. Each area has its own page with all four services: residential, attic and crawl space, retrofit and commercial spray foam.
The minimums are statewide, but the climate zone changes. Madison, Gwinnett and Coweta counties are IECC climate zone 3A, Dawson County is 4A and Bryan County is 2A. Under Georgia's 2020 amendments, ceilings (R-38) and walls (R-13) are the same in all three zones, but crawl space walls and some unvented-attic options are not.
Georgia's energy code (2015 IECC with Georgia amendments) requires R-38 on the attic floor; R-30 counts as R-38 when it keeps its full depth over the wall top plates (Section R402.2.1). When the roof deck is insulated with spray foam instead, the Georgia trade-off path allows R-20 of air-impermeable insulation at the deck.
Georgia Power customers can receive up to $300 for upgrading attic insulation from R-38 or less to R-49 through the Home Energy Improvement Program, and bundles with air sealing reach up to $1,850 with an affiliated installer. Some EMCs, such as Jackson EMC, run their own insulation rebates. Check eligibility with your utility before work starts.
Tell us your city and what needs insulating. We'll confirm the code minimums for your address and send you an estimate.
