Concord, NC
6 miles north
Median home built 1998 (Harrisburg: 2006); Power from its own town system (Harrisburg: Duke Energy Carolinas)
Insulation company serving ConcordAttic Insulation in Harrisburg, NC
Blown-in attic insulation for Harrisburg, NC, 6 miles from Concord, plus removal and air sealing.
About Harrisburg and Its Homes
Harrisburg began as Harris Depot, named for the family that sold the right-of-way when the railroad was built in the 1850s, and took its present name in 1874. It was only incorporated in 1973, and it has grown since then as a suburb between Concord and Charlotte.
Harrisburg, in Cabarrus County, grew from 18,937 people in 2020 to 20,742 in 2025 (Census Bureau estimates), on 12.5 square miles. That makes Harrisburg the third-largest town in Cabarrus County.
Harrisburg has about 6,600 housing units, 7 percent of Cabarrus County's; 92 percent of the town's households own their home.
Harrisburg at a Glance
- County: Cabarrus County
- Population: 20,742 (2025), 18,937 (2020), up 9.5%
- Land area: 12.5 square miles (1,654 people each)
- Housing units: about 6,600 (±395)
- Median year built: 2006 (±1); Cabarrus County: 1997
- Owner-occupied: 92% (±1); Cabarrus County: 71%
- Detached houses: 88% (±4); Cabarrus County: 76%
- Attached houses: 10% (±3)
- Apartments: 2% (±1)
- Climate zone: 3 on both maps
- ENERGY STAR target for Harrisburg attics: R-49 from bare, R-38 over 3 to 4 inches (R-value guide)
Census Bureau estimates for Harrisburg, 2020 to 2024 (± margin of error).
Harrisburg Homes and Their Attics
A Room Over the Garage in a Newer House
Harrisburg became a town in 1973, and the Census figures on this page show most of its homes went up in 1970 or later. If your house has a bonus room above the garage, that room sits on a floor with unheated garage air below and sloped knee walls at its sides. Federal Building America guidance treats that floor as an outside surface once people live above it. Every seam and hole in it is air sealed, and the insulation is held tight against the subfloor rather than sagging away. The knee walls and the slim attics behind them are sealed and insulated too.
Attic Insulation in Harrisburg
Some 5 percent of Harrisburg's homes predate 1970; if your joists show above the insulation, ENERGY STAR says to add more insulation.
From 1990 to 2009, 52 percent of Harrisburg homes were built to codes below ENERGY STAR's target; check their eaves, where ENERGY STAR says insulation is often thinnest.
The Local Climate
Harrisburg's center sits about 630 feet above sea level, 7 miles from NOAA's Concord station, the best match for Harrisburg. The station's 1991 to 2020 normals average about 3,290 heating and 1,760 cooling degree days a year, so at Harrisburg's station, heating needs outweigh cooling.
Homes by Age: What It Means for the Attic
Some 88 percent of Harrisburg housing units are detached single-family houses.
In 2010 or later, 35 percent of Harrisburg homes went up; check their air sealing as well as the depth.
Homes by Year Built
- Before 1940: 1% (±1), about 45 units
- 1940s: under 1%, about 30 units
- 1950s: under 3%, about 90 units
- 1960s: 2% (±2), about 155 units
- 1970s: 4% (±2), about 255 units
- 1980s: 4% (±2), about 295 units
- 1990s: 12% (±3), about 780 units
- 2000s: 40% (±5), about 2,600 units
- 2010s: 30% (±4), about 1,990 units
- 2020 or later: 4% (±2), about 290 units
Air Sealing and Duct Sealing in Harrisburg
In Harrisburg, 29 percent of homes heat with electricity and 67 percent with piped gas; forced air from either moves through ducts.
Air sealing comes first, as the EPA advises: wire and pipe holes, wall tops and soffits.
How Homes Here Are Heated
- Electricity: 29% (±6), about 1,820 households; Cabarrus County: 56%
- Piped gas: 67% (±5), about 4,100 households
- Bottled or tank gas: under 3%, about 90 households
Power, Gas and Rebates
Duke Energy Carolinas serves most of Harrisburg, Union Power Cooperative its edges; your bill says which. For gas, Harrisburg is in the Cabarrus County franchise of Enbridge Gas North Carolina, and 67 percent of the town's homes heat with piped gas. Duke's free House Call fits many Harrisburg homes: 29 percent heat with electricity.
Rebate to check in Harrisburg: Smart $aver Insulate and Seal (Duke Energy; Insulation Pros is an approved trade ally). Before a job in Harrisburg, check its current terms; the Cabarrus County page lists every program.
Attic Insulation Removal in Harrisburg
In a Harrisburg attic, only wet, moldy or animal-soiled insulation is vacuumed out (ENERGY STAR's test), once the cause is fixed, and after mice that Harrisburg attic is sanitized and deodorized; dry, clean insulation stays.
Also Serving Near Harrisburg
Nearest to Harrisburg first.
Midland, NC
8 miles southeast
Median home built 2010 (Harrisburg: 2006); 5,151 people, about a quarter of Harrisburg's population
Attic insulation in MidlandMint Hill, NC
9 miles south
Median home built 1992 (Harrisburg: 2006); Center about 160 feet higher than Harrisburg's
Attic insulation in Mint HillKannapolis, NC
12 miles north
Median home built 1989 (Harrisburg: 2006); Center about 170 feet higher than Harrisburg's
Insulation contractor serving KannapolisLocust, NC
12 miles east
Power from Duke Energy (Harrisburg: Duke Energy Carolinas); 6,120 people, about a third of Harrisburg's population
Attic insulation in Locust
Harrisburg Insulation FAQs
Is my Harrisburg house in a historic district?
No. Not one property in Harrisburg appears among the state's National Register entries, and the only local historic commission it shows for Cabarrus County in 2023 is Concord's, which works inside Concord. So no historic district rules apply to an attic here. A house left from the depot days would still get the usual older-house checks before insulating.
Can a Harrisburg house built after 1978 still need attic work?
It can. State law has required new homes begun since January 1, 1978 to meet insulation standards before anyone moves in, wherever a county or city enforces those standards. That rule says nothing about air leaks. ENERGY STAR lists the usual ones: wiring and plumbing holes, the attic hatch, dropped soffits over cabinets and recessed lights. Insulation also gets pushed aside when cable or a fan goes in. We look for gaps and thin spots and seal before adding anything.
Does attic insulation in Harrisburg need a permit?
Harrisburg Town Hall can say whether Cabarrus County Property, Building and Development, the town itself or another office handles permits in Harrisburg; ask before work starts.
Helpful Guides
- Power from Duke Energy Carolinas: high summer electric bills and home energy audits
Sources
Census Bureau figures for Harrisburg, NOAA normals for the Concord station, Duke Energy Carolinas (October 2026). Compiled by Insulation Pros. How the town pages are made.
Sources for the Harrisburg notes and questions (read October 20, 2026):
- Governor Proclaims In Recognition of the 50th Anniversary of the Town of Harrisburg, Office of the Governor of North Carolina
- Harrisburg, in The North Carolina Gazetteer (William S. Powell, 2nd ed., UNC Press 2010), NCpedia
- Year Structure Built (table B25034), Harrisburg town, American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau via Census Reporter
- Floor Above Garage, Building America Solution Center (Pacific Northwest National Laboratory, U.S. Department of Energy)
- Attic Air Sealing 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)
- N.C. Gen. Stat. 143-139.2, Enforcement of insulation requirements; certificate for occupancy
Harrisburg, NC
Open in Google Maps (opens in a new tab)Serving Harrisburg, NC
Insulation Pros is an insulation contractor serving North Carolina, Harrisburg and the rest of Cabarrus County included.
Reach us
Send the square footage of your Harrisburg attic, or call (336) 870-3893.