Ocean Isle Beach, NC
3 miles east
Median home built 1996 (Sunset Beach: 2000); 940 people, about a fifth of Sunset Beach's population
Attic insulation in Ocean Isle BeachAttic Insulation in Sunset Beach, NC
Blown-in attic insulation for Sunset Beach, NC, in Brunswick County, plus removal and air sealing.
About Sunset Beach and Its Homes
Sunset Beach was incorporated in 1963, and its barrier island is linked to the mainland across the Intracoastal Waterway. Its beach took the force of Hurricane Hazel in 1954, and the Census figures here show most homes went up from 1970 on.
Sunset Beach, in Brunswick County, grew from 4,153 people in 2020 to 4,642 in 2025 (Census Bureau estimates), on 6.97 square miles.
Sunset Beach has about 5,200 housing units, 5 percent of Brunswick County's; about 86 percent of the town's households own their home. Only about 2,400 of those 5,200 units were someone's usual home in the Census Bureau's 2020 to 2024 survey; the heating and owner figures on this page describe those 2,400.
Sunset Beach at a Glance
- County: Brunswick County
- Population: 4,642 (2025), 4,153 (2020), up 11.8%
- Land area: 6.97 square miles (666 people each)
- Housing units: about 5,200 (±313)
- Median year built: 2000 (±3); Brunswick County: 2002
- Owner-occupied: 86% (±6); Brunswick County: 85%
- Detached houses: 55% (±4); Brunswick County: 69%
- Attached houses: 4% (±2)
- Apartments: 31% (±6)
- Mobile homes: 10% (±5)
- Climate zone: 3 on both maps
- ENERGY STAR target for Sunset Beach attics: R-49 from bare, R-38 over 3 to 4 inches (R-value guide)
Census Bureau estimates for Sunset Beach, 2020 to 2024 (± margin of error).
Sunset Beach Homes and Their Attics
Bath, Range and Dryer Vents by the Sea
Storms and steady humidity, the county survey says, help explain why Brunswick County kept so little early wooden building. In that kind of air, the damp exhaust from a bath fan, a range hood or a clothes dryer has to leave the house entirely. ENERGY STAR lists any of those vents that empties into the attic as a condition to correct before insulating. Those get rerouted to the outdoors before any insulation goes in. The soffit vents stay uncovered too, since summer airflow through the attic is what carries its heat and moisture away.
Attic Insulation in Sunset Beach
If the joists show above the insulation in a Sunset Beach attic, ENERGY STAR says to add more insulation.
From 1990 to 2009, about 65 percent of Sunset Beach homes were built to codes below ENERGY STAR's target; check their eaves, where ENERGY STAR says insulation is often thinnest.
The Local Climate
Sunset Beach's center sits near sea level, 8 miles from NOAA's Shallotte Ag station, the best match for Sunset Beach. The station's 1991 to 2020 normals average about 2,430 heating and 1,860 cooling degree days a year, so Sunset Beach attics work in both seasons.
The state energy code marks Brunswick County warm and humid.
Homes by Age: What It Means for the Attic
Some 55 percent of Sunset Beach housing units are detached single-family houses, 10 percent mobile homes.
Built from 1970 to 1989, about 25 percent of Sunset Beach homes may hold settled fiberglass; check its depth against the joists.
About 31 percent of Sunset Beach units sit in buildings of two or more homes, where the attic is often shared.
Homes by Year Built
- Before 1940: under 1%, about 10 units
- 1940s: under 1%
- 1950s: under 1%
- 1960s: 1% (±1), about 35 units
- 1970s: 8% (±4), about 420 units
- 1980s: 15% (±5), about 770 units
- 1990s: 27% (±6), about 1,440 units
- 2000s: 36% (±4), about 1,870 units
- 2010s: 11% (±5), about 570 units
- 2020 or later: 2% (±1), about 125 units
Air Sealing and Duct Sealing in Sunset Beach
In Sunset Beach, 92 percent of households heat with electricity; where that heat is forced air, ducts often run through the attic.
Air sealing comes first, as the EPA advises: wire and pipe holes, wall tops and soffits.
How Homes Here Are Heated
- Electricity: 92% (±5), about 2,200 households; Brunswick County: 87%
- Piped gas: 2% (±1), about 45 households
- Bottled or tank gas: 6% (±3), about 140 households
Power, Gas and Rebates
Power in and around Sunset Beach comes from Duke Energy Progress and Brunswick Electric; your bill says which. For gas, Sunset Beach is in the Brunswick County franchise of Piedmont Natural Gas, whose mains may not reach every street in Sunset Beach. Duke's free House Call fits many Sunset Beach homes: 92 percent of households heat with electricity.
Rebate to check if Duke Energy Progress serves your Sunset Beach home: Smart $aver Insulate and Seal (Duke Energy; Insulation Pros is an approved trade ally). Before a job in Sunset Beach, check its current terms; the Brunswick County page lists every program.
Attic Insulation Removal in Sunset Beach
In a Sunset Beach attic, only wet, moldy or animal-soiled insulation is vacuumed out (ENERGY STAR's test), once the cause is fixed, and after mice that Sunset Beach attic is sanitized and deodorized; dry, clean insulation stays.
Also Serving Near Sunset Beach
Nearest to Sunset Beach first.
Calabash, NC
3 miles west
Median home built 1995 (Sunset Beach: 2000); Its NOAA station logs about 240 more heating degree days than Sunset Beach's
Attic insulation in CalabashCarolina Shores, NC
4 miles west
Median home built 2004 (Sunset Beach: 2000)
Attic insulation in Carolina ShoresHolden Beach, NC
11 miles east
Median home built 1992 (Sunset Beach: 2000); 916 people, about a fifth of Sunset Beach's population
Attic insulation in Holden Beach
Sunset Beach Insulation FAQs
Isaias landed right next door in 2020. What should Sunset Beach owners check overhead?
Look under the roof for stains, daylight or damp insulation. Isaias came ashore at Ocean Isle Beach, the next beach town east, just after 11 at night on August 3, 2020, with winds near 85 mph. A buoy two miles off Sunset Beach logged a 76 mph gust. Lifted shingles let rain soak the layer below. ENERGY STAR treats that dampness as a roofing problem to fix before anything else, and the sodden insulation is then vacuumed out and renewed.
Is anything in Sunset Beach listed as historic?
No register listing turns up for the town on the state's roster. The 2010 county survey did record the swing bridge and a cemetery of small brick tombs here. One tomb seems to carry an 1830s date. Being surveyed is different from being listed, though. The state's 2023 roll of preservation commissions had no Brunswick County entry, so attic work here meets no historic review.
Does attic insulation in Sunset Beach need a permit?
Sunset Beach Town Hall can say whether Brunswick County Permits & Development, the town itself or another office handles permits in Sunset Beach; ask before work starts.
Helpful Guides
- Brunswick County is warm and humid by the state energy code: attic condensation and mold
- Median home built 2000: a hot upstairs and bonus rooms over garages
Sources
Census Bureau figures for Sunset Beach, NOAA normals for the Shallotte Ag station (October 2026). Compiled by Insulation Pros. How the town pages are made.
Sources for the Sunset Beach notes and questions (read October 20, 2026):
- Sunset Beach, in The North Carolina Gazetteer (William S. Powell, 2nd ed., UNC Press 2010), NCpedia
- Comprehensive Historical/Architectural Site Survey of Brunswick County, North Carolina (Landmark Preservation Associates, September 2010), NC HPO
- Hurricane Hazel (D-109), North Carolina Highway Historical Marker Program, NC Department of Natural and Cultural Resources
- Year Structure Built (table B25034), Sunset Beach town, American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau via Census Reporter
- Attic Insulation Project, ENERGY STAR
- About Attic Ventilation, ENERGY STAR do-it-yourself guide
- Hurricane Isaias, August 3-4, 2020, event summary, National Weather Service Wilmington
- NC Listings in the National Register of Historic Places, NC State Historic Preservation Office
- Historic Preservation Commission Staff in North Carolina, listed by county, as of 2/20/2023 (NC HPO)
Sunset Beach, NC
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Insulation Pros is an insulation contractor serving North Carolina, Sunset Beach and the rest of Brunswick County included.
Reach us
Send the square footage of your Sunset Beach attic, or call (336) 870-3893.