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Service area · Gwinnett County
NJ Spray Foam LLC serves homes and businesses across Gwinnett County, GA, from Buford and Sugar Hill in the north to Snellville, Grayson and Loganville in the east. Gwinnett has about 153,000 owner-occupied single-family homes (Census), mostly built in the 1990s, and all of it is Georgia climate zone 3A.
Services in 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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NJ Spray Foam LLC installs residential spray foam across Gwinnett County, GA, from Lawrenceville and Buford to Snellville and Duluth. Gwinnett has about 153,000 owner-occupied single-family homes (Census), most built in the 1990s, and the whole county follows Georgia's climate zone 3A code.
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NJ Spray Foam LLC insulates attics and crawl spaces across Gwinnett County, GA. Most Gwinnett attics date from the 1990s, have settled insulation and carry ductwork, and lake-side and older homes add damp crawl spaces to the list.
See attic & crawl space in Gwinnett County.webp)
NJ Spray Foam LLC retrofits finished homes across Gwinnett County, GA with spray foam. Much of the county was built in the 1980s and 1990s, and those homes respond well to sealing the attic, rim joists and garage ceilings without opening finished walls.
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NJ Spray Foam LLC sprays commercial buildings across Gwinnett County, GA, from warehouses along I-85 and I-985 to metal shops, offices and public buildings around Lawrenceville.
See commercial in Gwinnett CountyLocal know-how
All of Gwinnett is climate zone 3A, so the insulation minimums are the same countywide. Permits are not: unincorporated areas use Gwinnett County Planning & Development, and incorporated cities may run their own process.
Gwinnett County requires a residential compliance affidavit for the Georgia State Energy Code, listing insulation R-values, before it issues a permit for a new home or addition.
Lilburn and Norcross skew to the late 1980s, Buford and Duluth to the mid-1990s, Sugar Hill and Suwanee to the early 2000s and Grayson to the 2010s. The older the home, the more air sealing matters.
Gwinnett homes are served by Georgia Power or one of the area EMCs. Georgia Power customers can use the Home Energy Improvement Program, and Jackson EMC runs its own insulation rebate for members.
Rules at a glance
Gwinnett County Planning & Development permits unincorporated areas and requires the energy code affidavit for new homes and additions. City addresses follow the city's process; we confirm it for yours.
Summary of official guidance for planning only. We confirm the rules for your address during the site visit.
| Location / item | Limit |
|---|---|
| IECC climate zone | 3A (warm, humid) |
| Attic floor (ceiling) insulation | R-38, or R-30 at full depth over the top plates |
| Spray foam at the roof deck (unvented attic) | R-20 minimum on the trade-off path |
| Wood-frame exterior walls | R-13 |
| Unvented crawl space walls | R-13 cavity or R-5 continuous |
| Air leakage test on new homes | Under 5 ACH50, by a certified verifier |
| New-home permits (unincorporated) | Energy code compliance affidavit |
Coverage
I-85 and I-985 · GA-316 · Lake Lanier · Chattahoochee River
30043 · 30518 · 30024 · 30096 · 30017 · 30019 · 30052 · 30039 · 30092 · 30071 · 30047 · 30011
How it works
Tell us your Gwinnett County address and what needs insulating: attic, walls, crawl space or a building.
We measure, check existing insulation, ducts and moisture, and confirm the code minimums for your address.
Foam type, thickness, target R-values and schedule, in writing.
We spray, trim, clean up and review the finished work with you.
Lawrenceville, Buford, Sugar Hill, Suwanee, Duluth, Peachtree Corners, Snellville, Grayson, Dacula, Loganville, Norcross, Lilburn and Auburn, plus unincorporated Gwinnett.
Yes. The whole county is IECC climate zone 3A, so Georgia's minimums are R-38 for ceilings, R-13 for walls and R-13 or R-5 continuous for unvented crawl space walls.
For new homes and additions, yes. Gwinnett requires an Affidavit for Residential Dwellings showing compliance with the Georgia State Energy Code, including insulation R-values, before issuing the permit.
Georgia Power customers can get up to $300 for an attic upgrade from R-38 or less to R-49 through the HEIP program, and more in bundles with air sealing. Jackson EMC members can apply for that utility's own rebate.
Send your address and a few photos of the attic, crawl space or building. We'll confirm the code minimums for Gwinnett County and send you an estimate.
