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Oak Island, NC
2 miles southwest
Median home built 1997 (St. James: 2011)
Attic insulation in Oak IslandAttic Insulation in St. James, NC
Blown-in attic insulation for St. James, NC, 2 miles from Oak Island, plus removal and air sealing.
About St. James and Its Homes
St. James grew from a golf course community begun inland in the 1980s, opened its first course in 1991 and became a town in 1999, so its houses and attics are young.
St. James, in Brunswick County, grew from 6,548 people in 2020 to 7,318 in 2025 (Census Bureau estimates), on 9.11 square miles. That makes St. James the third-largest town in Brunswick County.
St. James has about 4,300 housing units, 4 percent of Brunswick County's; 96 percent of St. James' households own their home. About 3,500 of those 4,300 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 3,500.
St. James at a Glance
- County: Brunswick County
- Population: 7,318 (2025), 6,548 (2020), up 11.8%
- Land area: 9.11 square miles (803 people each)
- Housing units: about 4,300 (±326)
- Median year built: 2011 (±2); Brunswick County: 2002
- Owner-occupied: 96% (±3); Brunswick County: 85%
- Detached houses: 87% (±3); Brunswick County: 69%
- Attached houses: 3% (±2)
- Apartments: 10% (±6)
- Climate zone: 3 on both maps
- ENERGY STAR target for St. James attics: R-49 from bare, R-38 over 3 to 4 inches (R-value guide)
Census Bureau estimates for St. James, 2020 to 2024 (± margin of error).
St. James Homes and Their Attics
Revival-Style Houses Around the Golf Courses
The 2010 county survey ties the town to the golf course communities that drew retirees and second-home buyers to Brunswick County, with courses opened there in 1991, 1995 and 2006 to 2007. It found that most new houses in the county follow revival styles, Colonial Revival above all. If your house has wings, dormers or a garage under separate roof sections, each one can hide its own attic with its own way in. We find and measure every one. ENERGY STAR wants the layer even, without thin patches, and a small attic over a wing is easy to miss.
Long Summers and Ducts in the Attic
The county survey calls Brunswick County summers long and sweltering, and notes that its winters are the mildest in the state. If your heating and cooling ducts run through the attic, that summer heat reaches them. Building America notes that a radiant barrier keeps attic ducts cooler in summer and does the most over little insulation, but adds very little above an attic that is already well insulated. In a young house with a full attic, it may not be worth adding.
Attic Insulation in St. James
If the joists show above the insulation in a St. James attic, ENERGY STAR says to add more insulation.
In 2010 or later, about 55 percent of St. James homes went up; check their air sealing as well as the depth.
The Local Climate
St. James' center sits near sea level, 8 miles from NOAA's Southport 5 N station, the best match for St. James. The station's 1991 to 2020 normals average about 2,200 heating and 2,230 cooling degree days a year, so St. James 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 87 percent of St. James housing units are detached single-family houses.
From 1990 to 2009, about 45 percent of St. James homes were built to codes below ENERGY STAR's target; check their eaves, where ENERGY STAR says insulation is often thinnest.
Homes by Year Built
- Before 1940: under 1%
- 1940s: under 1%
- 1950s: under 5%, about 100 units
- 1960s: under 1%
- 1970s: under 1%
- 1980s: under 1%, about 10 units
- 1990s: 18% (±6), about 760 units
- 2000s: 26% (±5), about 1,130 units
- 2010s: 42% (±7), about 1,830 units
- 2020 or later: 11% (±5), about 490 units
Air Sealing and Duct Sealing in St. James
In St. James, about 75 percent of homes heat with electricity; where that heat is forced air, ducts often run through the attic.
Air sealing comes first in a St. James ceiling, as the EPA advises: wire and pipe holes, wall tops and soffits.
How Homes Here Are Heated
- Electricity: 75% (±6), about 2,600 households; Brunswick County: 87%
- Piped gas: 4% (±4), about 160 households
- Bottled or tank gas: 18% (±5), about 650 households
Power, Gas and Rebates
Power in and around St. James comes from Duke Energy Progress and Brunswick Electric; your bill says which. For gas, St. James is in the Brunswick County franchise of Piedmont Natural Gas, whose mains may not reach every St. James street. Duke's free House Call fits many St. James homes: about 75 percent heat with electricity. Bottled or tank gas, bought by the delivery, heats 18 percent of homes in St. James.
Rebate to check if Duke Energy Progress serves your St. James home: Smart $aver Insulate and Seal (Duke Energy; Insulation Pros is an approved trade ally). Before a St. James job, check its current terms; the Brunswick County page lists every program.
Attic Insulation Removal in St. James
In a St. James attic, only wet, moldy or animal-soiled insulation is vacuumed out (ENERGY STAR's test), once the cause is fixed, and after mice that St. James attic is sanitized and deodorized; dry, clean St. James insulation stays.
Also Serving Near St. James
Nearest to St. James first.
Caswell Beach, NC
4 miles southeast
Median home built 1998 (St. James: 2011); 381 people, under a tenth of St. James' population
Attic insulation in Caswell BeachVarnamtown, NC
8 miles west
Median home built 1990 (St. James: 2011); Its NOAA station logs about 230 more heating degree days than St. James'
Attic insulation in Varnamtown
St. James Insulation FAQs
Could my St. James house ever be listed as historic?
Not for a long while. The 2010 county survey explains that a building generally needs to be at least 50 years old before the National Register will consider it. The community's first golf course opened only in 1991. No property in town is on the register, and the county was absent from the state's 2023 roll of preservation commissions. Work in your attic faces no historic review.
My house here is fairly new, so why is some of the attic insulation dark?
Dark patches show where air from the house has been leaking through. A newer house can still have gaps where wires, pipes and duct chases pass through the ceiling. ENERGY STAR explains that insulation darkens as it filters dusty indoor air, which makes it a map of the leaks below. We seal those gaps from the attic side. The darkened insulation is still fine to use, ENERGY STAR says, so it goes back in place and new insulation can go over it.
Does attic insulation in St. James need a permit?
St. James Town Hall can say whether Brunswick County Permits & Development, St. James itself or another office handles St. James permits; ask before work starts.
Helpful Guides
- Brunswick County is warm and humid by the state energy code: attic condensation and mold and attic ventilation
- Median home built 2011: a hot upstairs and bonus rooms over garages
Sources
Census Bureau figures for St. James, NOAA normals for the Southport 5 N station (October 2026). Compiled by Insulation Pros. How the town pages are made.
Sources for the St. James notes and questions (read October 20, 2026):
- Comprehensive Historical/Architectural Site Survey of Brunswick County, North Carolina (Landmark Preservation Associates, September 2010), NC HPO
- Session Law 1999-241, An act to incorporate the Town of St. James, North Carolina General Assembly
- Adding Attic Insulation, ENERGY STAR do-it-yourself guide
- Attic Radiant Barriers, Building America Solution Center (PNNL, U.S. Department of Energy)
- 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)
- Attic Air Sealing Project, ENERGY STAR
St. James, NC
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Insulation Pros is an insulation contractor serving North Carolina, St. James and the rest of Brunswick County included.
Reach us
Send the square footage of your St. James attic, or call (336) 870-3893.