Montreat, NC
3 miles northeast
Center about 200 feet higher than Black Mountain's; 1,024 people, about an eighth of Black Mountain's population
Attic insulation in MontreatAttic Insulation in Black Mountain, NC
Blown-in attic insulation for Black Mountain, NC, in Buncombe County, plus removal and air sealing.
About Black Mountain and Its Homes
Black Mountain, called Grey Eagle until it was incorporated in 1893, grew up around a railroad depot opened about 1880 and filled each summer with visitors seeking cool mountain air. Its 2007 architectural survey found bungalows, many built with river rock, the most common houses of those growth years.
Black Mountain, in Buncombe County, grew from 8,442 people in 2020 to 8,491 in 2025 (Census Bureau estimates), on 6.71 square miles. That makes Black Mountain the second-largest town in Buncombe County.
Black Mountain has about 4,900 housing units, 4 percent of Buncombe County's; about 67 percent of the town's households own their home. Only about 3,600 of those 4,900 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 3,600.
Black Mountain at a Glance
- County: Buncombe County
- Population: 8,491 (2025), 8,442 (2020), up 0.6%
- Land area: 6.71 square miles (1,265 people each)
- Housing units: about 4,900 (±381)
- Median year built: 1986 (±4); Buncombe County: 1991
- Owner-occupied: 67% (±6); Buncombe County: 66%
- Detached houses: 74% (±6); Buncombe County: 64%
- Attached houses: 4% (±1)
- Apartments: 15% (±8)
- Mobile homes: 7% (±2)
- Climate zone: 4 on both maps
- ENERGY STAR target for Black Mountain attics: R-60 from bare, R-49 over 3 to 4 inches (R-value guide)
Census Bureau estimates for Black Mountain, 2020 to 2024 (± margin of error).
Black Mountain Homes and Their Attics
Boarding Houses That Grew in Stages
In 1912 a travel guide counted thirteen hotels and boarding houses in Black Mountain, with room for 600 summer visitors. The Dougherty Heights Historic District's nomination tells of an 1897 family house that became an inn. It was substantially enlarged in the late 1930s or early 1940s. The same nomination describes an eleven-room annex that later gained a four-room addition. A house that grew in stages can carry more than one roof. Every section may have a separate attic, a separate hatch and a different amount of insulation, or none at all. Each one is found and measured, then brought up evenly with no low spots, so no wing is left out.
River Rock Bungalows and Their Brick Chimneys
Of the buildings from 1940 or earlier that the 2007 survey recorded, 144 were bungalows, far more than any other style. They stand one story or a story and a half and are often trimmed in smooth river rock. In the Dougherty Heights inventory, interior brick chimneys come up again and again. A chimney inside the house climbs through the ceiling into the attic, and the opening around it lets warm air rise straight through. That opening gets a collar of sheet aluminum, sealed to the brick with high-temperature caulk, while a metal dam keeps the insulation off the masonry. Foam is never used there.
Attic Insulation in Black Mountain
Some 32 percent of Black Mountain's homes predate 1970; if your joists show above the insulation, ENERGY STAR says to add more insulation.
From 1990 to 2009, about 30 percent of Black Mountain homes were built to codes below ENERGY STAR's target; check their eaves, where ENERGY STAR says insulation is often thinnest.
The Local Climate
Black Mountain's center sits about 2,400 feet above sea level, 3 miles from NOAA's North Fork 2 station, the best match for Black Mountain. The station's 1991 to 2020 normals average about 4,000 heating and 800 cooling degree days a year, so at Black Mountain's station, heating needs outweigh cooling.
Readings change over short distances around Black Mountain: NOAA's Black Mountain 2 W station, 2 miles away, averages about 4,270 heating degree days. NOAA estimated part of the North Fork 2 station's normals from nearby stations, so treat them as approximate.
Homes by Age: What It Means for the Attic
Some 74 percent of Black Mountain housing units are detached single-family houses.
Built from 1970 to 1989, about 25 percent of Black Mountain homes may hold settled fiberglass; check its depth against the joists.
About 40 percent of Black Mountain's housing units predate 1980; nearly all predate the state's 1978 insulation rule too.
Homes by Year Built
- Before 1940: 10% (±4), about 500 units
- 1940s: 8% (±3), about 380 units
- 1950s: 7% (±2), about 330 units
- 1960s: 7% (±3), about 370 units
- 1970s: 9% (±3), about 430 units
- 1980s: 15% (±8), about 740 units
- 1990s: 16% (±7), about 800 units
- 2000s: 12% (±5), about 570 units
- 2010s: 12% (±4), about 570 units
- 2020 or later: 4% (±2), about 195 units
Air Sealing and Duct Sealing in Black Mountain
In Black Mountain, about 75 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: 75% (±8), about 2,700 households; Buncombe County: 65%
- Piped gas: 18% (±4), about 650 households
- Bottled or tank gas: 2% (±1), about 60 households
- Oil or kerosene: 4% (±2), about 155 households
- Wood: 1% (±1), about 40 households
Power, Gas and Rebates
Duke Energy serves most of Black Mountain, French Broad EMC its edges; your bill says which. For gas, Black Mountain is in the Buncombe County franchise of Enbridge Gas North Carolina, and 18 percent of the town's households heat with piped gas. Duke's free House Call fits many Black Mountain homes: about 75 percent of households heat with electricity.
Rebate to check in Black Mountain: Smart $aver Insulate and Seal (Duke Energy; Insulation Pros is an approved trade ally). Before a job in Black Mountain, check its current terms; the Buncombe County page lists every program.
Attic Insulation Removal in Black Mountain
In a Black Mountain attic, only wet, moldy or animal-soiled insulation is vacuumed out (ENERGY STAR's test), once the cause is fixed, and after mice that Black Mountain attic is sanitized and deodorized; dry, clean insulation stays.
Also Serving Near Black Mountain
Nearest to Black Mountain first.
Old Fort, NC
8 miles east
Median home built 1965 (Black Mountain: 1986); Center about 960 feet lower than Black Mountain's
Attic insulation in Old FortChimney Rock Village, NC
12 miles south
Center about 1,320 feet lower than Black Mountain's; Its NOAA station logs about 350 fewer heating degree days than Black Mountain's
Attic insulation in Chimney Rock VillageAsheville, NC
13 miles west
Median home built 1982 (Black Mountain: 1986); Center about 270 feet lower than Black Mountain's
Insulation company serving AshevilleBiltmore Forest, NC
13 miles southwest
Median home built 1959 (Black Mountain: 1986); 1,469 people, about a sixth of Black Mountain's population
Attic insulation in Biltmore Forest
Black Mountain Insulation FAQs
Do I need approval from the Black Mountain preservation commission before insulating my attic?
For the insulation, no. Black Mountain has its own Historic Preservation Commission, named on the state's 2023 list. State law limits such a commission to the exterior of a designated landmark or a building in a local district, and it has no jurisdiction over the arrangement inside. Insulating and air sealing an attic are inside work. The town's National Register districts, Downtown, Dougherty Heights and South Montreat Road, do not restrict a private owner by themselves. Raise new roof vents or other outside changes with the town first.
Our newer Black Mountain house has a boxed-in soffit over the kitchen cabinets. Could air leak there?
It could. By the Census figures on this page, fewer than half of Black Mountain's homes were built before 1970. Kitchen soffits are framed boxes, and some were never capped where they meet the attic. Insulation drifted across the top can hide that gap, ENERGY STAR warns. We pull the insulation aside, close the top with a sealed panel, and spread the insulation back evenly over it.
Could the old insulation in a Black Mountain attic be vermiculite?
It could: about 25 percent of Black Mountain's homes predate 1960. If a Black Mountain attic holds a pebble-like gray-brown or silver-gold fill, leave it undisturbed: the EPA says vermiculite may contain asbestos.
Does attic insulation in Black Mountain need a permit?
Black Mountain Town Hall can say whether Buncombe County Permits & Inspections, the town itself or another office handles permits in Black Mountain; ask before work starts.
Helpful Guides
- Mountain winters: attic ventilation and attic stairs and hatches
- Power from Duke Energy: high summer electric bills and home energy audits
Sources
Census Bureau figures for Black Mountain, NOAA normals for the North Fork 2 station, Duke Energy (October 2026). Compiled by Insulation Pros. How the town pages are made.
Sources for the Black Mountain notes and questions (read October 2026):
- Black Mountain, in The North Carolina Gazetteer (William S. Powell, 2nd ed., UNC Press 2010), NCpedia
- Dougherty Heights Historic District, National Register nomination (NC HPO)
- Black Mountain Architectural Survey (listed by the NC HPO as the Black Mountain Survey, 2007)
- Adding Attic Insulation, ENERGY STAR do-it-yourself guide
- Furnace Flues Require Special Sealing Techniques, ENERGY STAR do-it-yourself guide
- Attic Air Sealing Project, ENERGY STAR
- Historic Preservation Commission Staff in North Carolina, listed by county, as of 2/20/2023 (NC HPO)
- N.C. Gen. Stat. 160D-947, Certificate of appropriateness required
- 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
- ACS 2024 5-year, table B25034 (year structure built), Black Mountain town (Census Reporter)
- Sealing Air Leaks in the Attic, DIY Guide (ENERGY STAR)
Black Mountain, NC
Open in Google Maps (opens in a new tab)Serving Black Mountain, NC
Insulation Pros is an insulation contractor serving North Carolina, Black Mountain and the rest of Buncombe County included.
Reach us
Send the square footage of your Black Mountain attic, or call (336) 870-3893.