Fletcher, NC
6 miles northeast
Median home built 2001 (Mills River: 1997)
Attic insulation in FletcherAttic Insulation in Mills River, NC
Blown-in attic insulation for Mills River, NC, 6 miles from Fletcher, plus removal and air sealing.
About Mills River and Its Homes
Mills River, incorporated in June 2003, is named for the river that forms where its North and South forks meet and runs on to the French Broad. The county's 1980 survey recorded farmhouses from the middle 1800s in this valley, though most homes here date from 1970 on.
Mills River, in Henderson County, grew from 7,133 people in 2020 to 7,504 in 2025 (Census Bureau estimates), on 22.4 square miles. That makes Mills River the third-largest town in Henderson County.
Mills River has about 3,200 housing units, 5 percent of Henderson County's; about 86 percent of the town's households own their home.
Mills River at a Glance
- County: Henderson County
- Population: 7,504 (2025), 7,133 (2020), up 5.2%
- Land area: 22.4 square miles (335 people each)
- Housing units: about 3,200 (±239)
- Median year built: 1997 (±2); Henderson County: 1990
- Owner-occupied: 86% (±6); Henderson County: 75%
- Detached houses: 80% (±3); Henderson County: 69%
- Attached houses: 2% (±1)
- Apartments: under 3%
- Mobile homes: 16% (±5)
- Climate zone: 4 on both maps
- ENERGY STAR target for Mills River attics: R-60 from bare, R-49 over 3 to 4 inches (R-value guide)
Census Bureau estimates for Mills River, 2020 to 2024 (± margin of error).
Mills River Homes and Their Attics
Valley Farmhouses and Their Rear Additions
The 1980 Henderson County survey describes the I-house as the larger farmhouse of the mid-1800s here: two stories, with a center hall between two rooms. Every one it recorded had grown extensive additions at the back. Most survivors stood in the French Broad valley, the county's most prosperous farm country in that century. Two adjoining Mills River farms on its pages were bought by Charleston families during or after the Civil War. A farmhouse enlarged that way can hide several attics, one over the main block and one under each later roof. Each section can have its own access and depth. We go into each one, and each gets an even layer from wall to wall without hollows.
Attic Insulation in Mills River
Some 14 percent of Mills River's homes predate 1970; if your joists show above the insulation, ENERGY STAR says to add more insulation.
From 1990 to 2009, about 45 percent of Mills River homes were built to codes below ENERGY STAR's target; check their eaves, where ENERGY STAR says insulation is often thinnest.
The Local Climate
Mills River's center sits about 2,100 feet above sea level, 3 miles from NOAA's Asheville Regional Airport station, the best match for Mills River. The station's 1991 to 2020 normals average about 3,840 heating and 1,050 cooling degree days a year, so at Mills River's station, heating needs outweigh cooling.
Readings change over short distances around Mills River: NOAA's Asheville 13 S station, 2 miles away, averages about 4,240 heating degree days.
Homes by Age: What It Means for the Attic
Some 80 percent of Mills River housing units are detached single-family houses, 16 percent mobile homes.
Built from 1970 to 1989, 22 percent of Mills River homes may hold settled fiberglass; check its depth against the joists.
About 23 percent of Mills River's housing units predate 1980; nearly all predate the state's 1978 insulation rule too.
Homes by Year Built
- Before 1940: 3% (±2), about 80 units
- 1940s: under 1%
- 1950s: 4% (±2), about 140 units
- 1960s: 7% (±3), about 225 units
- 1970s: 9% (±4), about 270 units
- 1980s: 13% (±3), about 410 units
- 1990s: 20% (±6), about 650 units
- 2000s: 24% (±5), about 750 units
- 2010s: 17% (±5), about 550 units
- 2020 or later: 3% (±2), about 90 units
Air Sealing and Duct Sealing in Mills River
In Mills River, 63 percent of homes 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: 63% (±5), about 1,720 households; Henderson County: 60%
- Piped gas: 20% (±5), about 540 households
- Bottled or tank gas: 13% (±5), about 360 households
- Oil or kerosene: 1% (±1), about 35 households
- Wood: under 4%, about 50 households
Power, Gas and Rebates
Duke Energy supplies Mills River's electricity. For gas, Mills River is in the Henderson County franchise of Enbridge Gas North Carolina, and 20 percent of the town's homes heat with piped gas. Duke's free House Call fits many Mills River homes: 63 percent heat with electricity. Bottled or tank gas, bought by the delivery, heats 13 percent of homes in Mills River.
Rebate to check in Mills River: Smart $aver Insulate and Seal (Duke Energy; Insulation Pros is an approved trade ally). Before a job in Mills River, check its current terms; the Henderson County page lists every program.
Attic Insulation Removal in Mills River
In a Mills River attic, only wet, moldy or animal-soiled insulation is vacuumed out (ENERGY STAR's test), once the cause is fixed, and after mice that Mills River attic is sanitized and deodorized; dry, clean insulation stays.
Also Serving Near Mills River
Nearest to Mills River first.
Laurel Park, NC
7 miles southeast
Median home built 1982 (Mills River: 1997); Center about 270 feet higher than Mills River's
Attic insulation in Laurel ParkHendersonville, NC
8 miles southeast
Median home built 1987 (Mills River: 1997); Its NOAA station logs about 330 more heating degree days than Mills River's
Insulation contractor serving HendersonvilleBiltmore Forest, NC
11 miles north
Median home built 1959 (Mills River: 1997); Center about 170 feet higher than Mills River's
Attic insulation in Biltmore ForestFlat Rock, NC
11 miles southeast
Median home built 1992 (Mills River: 1997); 3,643 people, about half of Mills River's population
Attic insulation in Flat Rock
Mills River Insulation FAQs
Helene's rain came through our Mills River roof. What happens to the attic insulation?
The roof gets fixed first, then the insulation. The National Hurricane Center's report on Helene, which struck in September 2024, records hurricane-force gusts reaching the mountains of western North Carolina. It also logs more than 20 inches of rain in parts of Henderson County. The river gauge by the town beat its 1928-to-date record by 2 feet. ENERGY STAR's checklist reads damp insulation as a roof leak, and the leak gets repaired before any attic work. With the roof made tight, we vacuum out every soggy layer and blow in fresh insulation.
Is anything in Mills River listed on the National Register?
No, not within the town limits, on the state's list. The closest entry, the chapel by the same name, was listed in 1988 as a vicinity property, the label the state gives places outside a town. Of the three Henderson County commissions on the state's 2023 roster, none was set up for this town. A house in this town carries no historic designation that would limit insulating it. An old farmhouse still has its wiring and any chimney looked at before insulation goes in.
Does attic insulation in Mills River need a permit?
Mills River Town Hall can say whether Henderson County Permits & Inspections, the town itself or another office handles permits in Mills River; ask before work starts.
Helpful Guides
- Climate zone 4: attic stairs and hatches
- Power from Duke Energy: high summer electric bills and home energy audits
Sources
Census Bureau figures for Mills River, NOAA normals for the Asheville Regional Airport station, Duke Energy (October 2026). Compiled by Insulation Pros. How the town pages are made.
Sources for the Mills River notes and questions (read October 20, 2026):
- Community, Town of Mills River
- Mills River, in The North Carolina Gazetteer (William S. Powell, 2nd ed., UNC Press 2010), NCpedia
- Henderson County architectural survey report, 1980 (NC HPO survey reports by county)
- Year Structure Built (table B25034), Mills River town, American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau via Census Reporter
- Adding Attic Insulation, ENERGY STAR do-it-yourself guide
- Hurricane Helene (AL092024), 24-27 September 2024, Tropical Cyclone Report, National Hurricane Center
- Attic Insulation Project, ENERGY STAR
- 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)
Mills River, NC
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Insulation Pros is an insulation contractor serving North Carolina, Mills River and the rest of Henderson County included.
Reach us
Send the square footage of your Mills River attic, or call (336) 870-3893.