Attic Insulation in Forsyth County, NC

Forsyth County and Its Homes

Forsyth County grew 5 percent from 2020 to 2025, to 401,718 people by the Census Bureau's estimate, in about 175,600 housing units.

Its eight incorporated towns each have a page here: Winston-Salem, Kernersville, Clemmons, Lewisville, Walkertown, Rural Hall, Tobaccoville and Bethania. About 85 percent of Forsyth County's housing units are inside town limits, the rest in unincorporated areas.

Small 18th-century stone and brick church house with a white belfry on a green lawn — The Gemeinhaus at Historic Bethabara Park, Winston-Salem, Forsyth County, North Carolina Photo: P. Hughes, CC BY 4.0, via Wikimedia Commons; cropped and resized

Forsyth County at a Glance

Population: 401,718 (2025), 382,618 (2020)
Housing units: about 175,600
Median year built: 1984 (North Carolina: 1991)
Built before 1980: 44% (statewide: 34%)
Detached houses: 67%
Mobile homes: 3%
Owner-occupied: 64%
Heated with electricity: 63% (statewide: 65%)
Climate zone: 3 (2021 map), 4 (state code)
Towns with pages here: 8

Census Bureau estimates for Forsyth County (housing: 2020 to 2024).

Towns and Communities in Forsyth County

Winston-Salem
257,271 people · median home 1981 · Duke Energy Carolinas
Kernersville
29,128 people · median home 1995 · Duke Energy Carolinas
Clemmons
22,808 people · median home 1994 · Duke Energy Carolinas
Lewisville
14,421 people · median home 1987 · Duke Energy Carolinas
Walkertown
6,120 people · Duke Energy Carolinas
Rural Hall
3,607 people · median home 1980 · Duke Energy Carolinas
Tobaccoville
2,770 people · median home 1980 · power varies by address
Bethania
367 people · median home 1975 · Duke Energy Carolinas
King
Stokes County town · about 650 residents in Forsyth County
High Point
Guilford County town · about 450 residents in Forsyth County

Unincorporated communities the Census Bureau maps in Forsyth County: Germanton.

What We Do in Forsyth County

Attic Insulation in Forsyth County
Some 44 percent of Forsyth County housing units predate 1980; joists showing above their insulation mean more blown-in fiberglass is due, R-49 from bare.
Attic Insulation Removal in Forsyth County
Wet, moldy or animal-soiled insulation comes out of Forsyth County attics, and a mouse-soiled Forsyth County attic is sanitized and deodorized; in the 20 percent of homes built before 1960, vermiculite is ruled out first.
Air Sealing in Forsyth County
Some 63 percent of Forsyth County homes heat with electricity, often through attic ducts; their joints and the ceiling's gaps are sealed first.

Homes in Forsyth County

Half of Forsyth County's 175,600 housing units were built before 1984: 29 percent before 1970, 44 percent before 1980 (nearly all before the state's 1978 insulation rule) and 13 percent in 2010 or later. The largest share went up in the 2000s, under codes that asked for less than ENERGY STAR now suggests; ENERGY STAR notes insulation is often thinnest at the eaves. Among Forsyth County towns, the median home is oldest in Bethania (1975) and newest in Kernersville (1995).

Forsyth County by type: 67 percent detached houses, 26 percent in buildings of two or more homes and 3 percent mobile homes. In Forsyth County, 63 percent of homes heat with electricity, 29 percent with piped gas and 4 percent with oil or kerosene.

Forsyth County Homes by Year Built

Before 1940: about 11,110 units, 6% (±1)
1940s: about 5,980 units, 3% (±1)
1950s: about 17,540 units, 10% (±1)
1960s: about 16,700 units, 10% (±1)
1970s: about 25,720 units, 15% (±1)
1980s: about 25,420 units, 14% (±1)
1990s: about 24,670 units, 14% (±1)
2000s: about 26,140 units, 15% (±1)
2010s: about 18,540 units, 11% (±1)
2020 or later: about 3,810 units, 2% (±1)

Climate Across Forsyth County

NOAA 1991 to 2020 normals for Forsyth County towns, by station: Winston-Salem Reynolds Airport station (Winston-Salem, Kernersville and Walkertown): about 3,500 heating and 1,510 cooling degree days; Rural Hall station (Rural Hall, Tobaccoville and Bethania): about 3,960 heating and 1,220 cooling degree days; Yadkinville 6 E station (Clemmons): about 4,200 heating and 1,150 cooling degree days; Pfafftown station (Lewisville): about 4,040 heating and 1,380 cooling degree days.

Power and Gas in Forsyth County

The card lists Forsyth County's town utilities by the territory maps; a power bill confirms the one at an address.

Piedmont Natural Gas holds the Forsyth County gas franchise (NC Utilities Commission map), and 29 percent of Forsyth County homes heat with piped gas.

Who Supplies Power in Forsyth County

Duke Energy Carolinas: Winston-Salem, Kernersville, Clemmons, Lewisville, Walkertown, Rural Hall and Bethania; parts of Tobaccoville
Surry-Yadkin EMC: parts of Tobaccoville; homes near Winston-Salem, Clemmons, Lewisville, Rural Hall and Bethania
EnergyUnited: homes near Kernersville and Walkertown

Energy Programs for Forsyth County Homes

Check each program's current terms for a Forsyth County home; some pay only through the utility's contractor network. Insulation Pros is an approved Duke Energy trade ally for Duke's rebate.

Programs for Forsyth County

Smart $aver Insulate and Seal (Duke Energy rebate; Winston-Salem, Kernersville, Clemmons, Lewisville and more).
Home Energy House Call (Duke Energy home assessment; Winston-Salem, Kernersville, Clemmons, Lewisville and more).
Home Energy Audits (Surry-Yadkin EMC; Tobaccoville, near Winston-Salem, near Clemmons, near Lewisville and more): home energy audits for members.
Income-qualified Weatherization (Duke Energy income-qualified; Winston-Salem, Kernersville, Clemmons, Lewisville and more).
Energy Saver North Carolina (statewide income-qualified; any Forsyth County address).
Weatherization Assistance Program (statewide income-qualified; any Forsyth County address).
Piedmont Natural Gas lists rebates for high-efficiency gas furnaces, and none for insulation or air sealing (program page).

Get Your Free Estimate

or call (336) 870-3893

Forsyth County Insulation FAQs

Do you serve all of Forsyth County?

Yes: Winston-Salem, Kernersville, Clemmons, Lewisville, Walkertown, Rural Hall, Tobaccoville and Bethania, the parts of King and High Point inside Forsyth County, and every unincorporated Forsyth County address.

Which utilities offer insulation rebates in Forsyth County?

Duke Energy's Smart $aver Insulate and Seal (Winston-Salem, Kernersville, Clemmons, Lewisville and more).

Does attic insulation in Forsyth County need a permit?

Ask Winston-Salem and Forsyth County Inspections Division before work starts. For an address in Winston-Salem, Kernersville, Clemmons or another Forsyth County town, the town or city hall can tell you whether Forsyth County's office handles its permits.