Surf City, NC
8 miles northeast
Median home built 2002 (Topsail Beach: 1985); 5,142 people, about 10 times Topsail Beach's population
Attic insulation in Surf CityAttic Insulation in Topsail Beach, NC
Blown-in attic insulation for Topsail Beach, NC, 8 miles from Surf City, plus removal and air sealing.
About Topsail Beach and Its Homes
Topsail Beach, on the south end of Topsail Island, grew on land the Navy used for secret missile tests from 1946 to 1948 and was incorporated in 1963. Its houses stand on a barrier island that hurricanes have washed over.
Topsail Beach, in Pender County, grew from 466 people in 2020 to 503 in 2025 (Census Bureau estimates), on 4.39 square miles. That makes Topsail Beach the third-largest town in Pender County.
Topsail Beach has about 1,330 housing units, 4 percent of Pender County's. Only about 220 of those 1,330 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 220.
Topsail Beach at a Glance
- County: Pender County
- Population: 503 (2025), 466 (2020), up 7.9%
- Land area: 4.39 square miles (115 people each)
- Housing units: about 1,330 (±128)
- Median year built: 1985 (±2); Pender County: 1998
- Detached houses: 88% (±4); Pender County: 71%
- Attached houses: 3% (±2)
- Apartments: 9% (±4)
- Climate zone: 3 on both maps
- ENERGY STAR target for Topsail Beach attics: R-49 from bare, R-38 over 3 to 4 inches (R-value guide)
Census Bureau estimates for Topsail Beach, 2020 to 2024 (± margin of error).
Topsail Beach Homes and Their Attics
Summer Homes Among the Missile Towers
The town says that before World War II the island was reached only by boat, and its few buildings along the sound sheltered fishing trips and summer stays. The 1993 National Register paperwork for the old Navy test site describes year-round and summer homes spread among the surviving towers, two of which became houses in the 1950s and 1960s. If yours started out as a summer place, do not take winter insulation for granted. Go up and look at what is really there before deciding.
Attic Insulation in Topsail Beach
Some 22 percent of Topsail Beach's homes predate 1970; if your joists show above the insulation, ENERGY STAR says to add more insulation.
Built from 1970 to 1989, 38 percent of Topsail Beach homes may hold settled fiberglass; check its depth against the joists.
The Local Climate
Topsail Beach's center sits near sea level, 7 miles from NOAA's Surf City station, the best match for Topsail Beach. The station's 1991 to 2020 normals average about 2,770 heating and 1,740 cooling degree days a year, so at Topsail Beach's station, heating needs outweigh cooling.
Readings change over short distances around Topsail Beach: NOAA's Wilmington International Airport station, 17 miles away, averages about 2,330 heating degree days. The state energy code marks Pender County warm and humid.
Homes by Age: What It Means for the Attic
Some 88 percent of Topsail Beach housing units are detached single-family houses.
From 1990 to 2009, 32 percent of Topsail Beach homes were built to codes below ENERGY STAR's target; check their eaves, where ENERGY STAR says insulation is often thinnest.
About 40 percent of Topsail Beach's housing units predate 1980; nearly all predate the state's 1978 insulation rule too.
Homes by Year Built
- Before 1940: 1% (±1), about 15 units
- 1940s: 2% (±1), about 25 units
- 1950s: 8% (±4), about 115 units
- 1960s: 11% (±3), about 140 units
- 1970s: 18% (±4), about 235 units
- 1980s: 20% (±4), about 265 units
- 1990s: 21% (±4), about 275 units
- 2000s: 12% (±4), about 155 units
- 2010s: 8% (±3), about 100 units
- 2020 or later: 0% (±1)
Air Sealing and Duct Sealing in Topsail Beach
In Surf City, the nearest town to Topsail Beach with solid figures, 96 percent of homes heat with electricity.
Air sealing comes first, as the EPA advises: wire and pipe holes, wall tops and soffits.
Power, Gas and Rebates
Power in and around Topsail Beach comes from Duke Energy Progress and Jones-Onslow EMC; your bill says which. For gas, Topsail Beach is in the Pender County franchise of Piedmont Natural Gas, whose mains may not reach every street in Topsail Beach.
Rebate to check if Duke Energy Progress serves your Topsail Beach home: Smart $aver Insulate and Seal (Duke Energy; Insulation Pros is an approved trade ally). Before a job in Topsail Beach, check its current terms; the Pender County page lists every program.
Attic Insulation Removal in Topsail Beach
In a Topsail 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 Topsail Beach attic is sanitized and deodorized; dry, clean insulation stays.
Also Serving Near Topsail Beach
Nearest to Topsail Beach first.
Holly Ridge, NC
10 miles northeast
Median home built 2015 (Topsail Beach: 1985); 5,908 people, about 12 times Topsail Beach's population
Attic insulation in Holly RidgeWrightsville Beach, NC
14 miles southwest
Median home built 1978 (Topsail Beach: 1985); Its NOAA station logs about 440 fewer heating degree days than Topsail Beach's
Attic insulation in Wrightsville BeachNorth Topsail Beach, NC
15 miles northeast
Median home built 1989 (Topsail Beach: 1985); 1,097 people, about twice Topsail Beach's population
Attic insulation in North Topsail BeachWilmington, NC
17 miles southwest
126,809 people, about 252 times Topsail Beach's population
Insulation contractor serving Wilmington
Topsail Beach Insulation FAQs
After a hurricane, what goes first on my Topsail Beach attic list?
The roof boards and any insulation lying under a stain. In 1996 Hurricane Fran sent a storm tide of up to 12 feet over Topsail Island and nearly covered it, the National Weather Service reports. Florence in 2018 tore at roofs and siding on many island homes. ENERGY STAR treats insulation that has gone damp as evidence of a leaking roof, which is fixed before anything else. After that, we vacuum the wet batts or loose fill out and replace them.
Do the listed Navy towers put historic rules on houses around them?
No. Three Operation Bumblebee structures in town are on the National Register: the Assembly Building, the Control Tower and Observation Tower 2, all listed in 1993. The State Historic Preservation Office makes clear that a listing ties no private owner's hands when the owner pays for the work. The office's 2023 list of local preservation boards shows no Pender County entry. An attic job on a nearby house, or on one of the tower homes, has no extra historic step.
Does attic insulation in Topsail Beach need a permit?
Topsail Beach Town Hall can say whether Pender County Planning & Community Development, the town itself or another office handles permits in Topsail Beach; ask before work starts.
Helpful Guides
- Pender County is warm and humid by the state energy code: attic condensation and mold and attic ventilation
Sources
Census Bureau figures for Topsail Beach, NOAA normals for the Surf City station (October 2026). Compiled by Insulation Pros. How the town pages are made.
Sources for the Topsail Beach notes and questions (read October 20, 2026):
- Topsail Beach, in The North Carolina Gazetteer (William S. Powell, 2nd ed., UNC Press 2010), NCpedia
- U.S. Naval Ordnance Testing Facility Control Tower, National Register nomination (NC HPO)
- Hurricane Fran, September 5, 1996, National Weather Service Wilmington, North Carolina
- History of Topsail Beach, Town of Topsail Beach
- U.S. Naval Ordnance Testing Facility, Topsail Island, multiple property documentation form (NC HPO)
- Attic Insulation Project, ENERGY STAR
- Hurricane Florence, September 2018, National Weather Service Wilmington, North Carolina
- NC Listings in the National Register of Historic Places, NC State Historic Preservation Office
- What Is 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)
Topsail Beach, NC
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Insulation Pros is an insulation contractor serving North Carolina, Topsail Beach and the rest of Pender County included.
Reach us
Send the square footage of your Topsail Beach attic, or call (336) 870-3893.