Sharpsburg, NC
5 miles north
Median home built 1987 (Elm City: 1977); Power from its own town system (Elm City: Duke Energy Progress)
Attic insulation in SharpsburgAttic Insulation in Elm City, NC
Blown-in attic insulation for Elm City, NC, 5 miles from Sharpsburg, plus removal and air sealing.
About Elm City and Its Homes
Elm City began in 1873, when lots were auctioned beside the Wilmington and Weldon Railroad in a new town called Toisnot. Its historic district holds one-story frame cottages from the 1870s to about 1910, bungalows from the 1920s with rooms under the roof, and brick houses of the 1950s and 1960s.
Elm City, in Wilson County, grew from 1,232 people in 2020 to 1,250 in 2025 (Census Bureau estimates), on 2.15 square miles. That makes Elm City the second-largest town in Wilson County.
Elm City has about 610 housing units, 2 percent of Wilson County's; about 58 percent of the town's households own their home.
Elm City at a Glance
- County: Wilson County
- Population: 1,250 (2025), 1,232 (2020), up 1.5%
- Land area: 2.15 square miles (581 people each)
- Housing units: about 610 (±107)
- Median year built: 1977 (±4); Wilson County: 1986
- Owner-occupied: 58% (±10); Wilson County: 60%
- Detached houses: 73% (±10); Wilson County: 63%
- Apartments: 20% (±10)
- Mobile homes: 7% (±6)
- Climate zone: 3 on both maps
- ENERGY STAR target for Elm City attics: R-49 from bare, R-38 over 3 to 4 inches (R-value guide)
Census Bureau estimates for Elm City, 2020 to 2024 (± margin of error).
Elm City Homes and Their Attics
Wooden Cottages Built Before Electric Light
A local history quoted in the district's nomination says timber was so cheap in early Toisnot that every home was built of wood, most of them one story. The nomination dates the town's Victorian cottages from about 1875 to 1910. Electric lights came only in the early 1900s, and then only at night, from a generator switched off at midnight, so the oldest cottages were wired after they were built. ENERGY STAR flags old knob-and-tube circuits, used up to about 1930, as a fire risk when buried in insulation. An electrician traces the old runs before anything goes in, and a run that still carries power is left in the open.
Bungalows With Rooms Under the Roof
The district's inventory lists several one-and-one-half-story bungalows, many with a central dormer, as well as a brick Cape Cod and a gambrel-roofed Dutch Colonial house. Upstairs, the rooms fit under the sloping roof, with low side walls and a wedge of unfinished attic beyond each one. ENERGY STAR says the floor framing beneath those low walls is often open, and it leaks air even with insulation stuffed against it. An Iowa state guide on building problem areas adds that the pocket behind the kneewall is often leaky. Both pockets and the open framing get sealed and insulated, not only the flat ceiling at the top.
Attic Insulation in Elm City
About 30 percent of Elm City's homes predate 1970; if your joists show above the insulation, ENERGY STAR says to add more insulation.
The Local Climate
Elm City's center sits about 130 feet above sea level, 4 miles from NOAA's Rocky Mount-Wilson Airport station, the best match for Elm City. The station's 1991 to 2020 normals average about 3,270 heating and 1,680 cooling degree days a year, so at Elm City's station, heating needs outweigh cooling.
Homes by Age: What It Means for the Attic
About 73 percent of Elm City housing units are detached single-family houses.
Built from 1940 to 1969, about 20 percent of Elm City homes often have little insulation. From 1990 to 2009, about 20 percent of Elm City homes were built to codes below ENERGY STAR's target; check their eaves, where ENERGY STAR says insulation is often thinnest.
About 55 percent of Elm City's housing units predate 1980; nearly all predate the state's 1978 insulation rule too.
Homes by Year Built
- Before 1940: 11% (±5), about 65 units
- 1940s: under 6%, about 15 units
- 1950s: 12% (±6), about 75 units
- 1960s: 6% (±4), about 35 units
- 1970s: 26% (±10), about 155 units
- 1980s: 25% (±11), about 150 units
- 1990s: 14% (±8), about 85 units
- 2000s: under 10%, about 30 units
- 2010s: under 2%
- 2020 or later: under 2%
Air Sealing and Duct Sealing in Elm City
In Elm City, about 81 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: 81% (±10), about 440 households; Wilson County: 63%
- Piped gas: under 5%, about 10 households
- Bottled or tank gas: 15% (±8), about 80 households
Power, Gas and Rebates
Duke Energy Progress supplies Elm City's electricity. For gas, Elm City is in the Wilson County franchise of Piedmont Natural Gas, whose mains may not reach every street in Elm City. Duke's free House Call fits many Elm City homes: about 81 percent heat with electricity. Bottled or tank gas, bought by the delivery, heats about 15 percent of homes in Elm City.
Rebate to check in Elm City: Smart $aver Insulate and Seal (Duke Energy; Insulation Pros is an approved trade ally). Before a job in Elm City, check its current terms; the Wilson County page lists every program.
Attic Insulation Removal in Elm City
In an Elm City attic, only wet, moldy or animal-soiled insulation is vacuumed out (ENERGY STAR's test), once the cause is fixed, and after mice that Elm City attic is sanitized and deodorized; dry, clean insulation stays.
Also Serving Near Elm City
Nearest to Elm City first.
Wilson, NC
7 miles southwest
Median home built 1983 (Elm City: 1977); Its NOAA station logs about 210 fewer heating degree days than Elm City's
Insulation contractor serving WilsonMacclesfield, NC
11 miles east
408 people, about a third of Elm City's population
Attic insulation in MacclesfieldSaratoga, NC
11 miles southeast
363 people, about a third of Elm City's population
Attic insulation in SaratogaRocky Mount, NC
12 miles north
Median home built 1979 (Elm City: 1977); 55,120 people, about 44 times Elm City's population
Attic insulation in Rocky Mount
Elm City Insulation FAQs
Would being in the Elm City historic district stop me from changing my house?
No. Its National Register listing came in 1986, and a listing like that gives no agency control over a privately funded repair or remodel, as the State Historic Preservation Office explains it. Wilson's commission is the lone one in the county on the office's 2023 roster, and Elm City has none of its own. Attic work is indoor work regardless. Check with town hall before any new vent is cut through the roof.
Were the old wooden cottages of Toisnot built with any insulation?
Nothing required it. North Carolina's occupancy rule on insulation reaches only houses begun in 1978 or later, and Toisnot's first cottages predate it by about a hundred years. The nomination says nothing about insulation, so depth and coverage have to be measured house by house. We check the whole ceiling, over any rear wing too, and close the gaps first.
Could the old insulation in an Elm City attic be vermiculite?
It could: about 25 percent of Elm City's homes predate 1960. If an Elm City 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 Elm City need a permit?
Elm City Town Hall can say whether Wilson County Inspections Division, the town itself or another office handles permits in Elm City; ask before work starts.
Helpful Guides
- Power from Duke Energy Progress: high summer electric bills and home energy audits
Sources
Census Bureau figures for Elm City, NOAA normals for the Rocky Mount-Wilson Airport station, Duke Energy Progress (October 2026). Compiled by Insulation Pros. How the town pages are made.
Sources for the Elm City notes and questions (read October 20, 2026):
- Elm City, in The North Carolina Gazetteer (William S. Powell, 2nd ed., UNC Press 2010), NCpedia
- Elm City Municipal Historic District, National Register nomination (Kate Ohno, 1981; NC HPO)
- Attic Insulation Project, ENERGY STAR
- Sealing Air Leaks in the Attic, ENERGY STAR do-it-yourself guide
- Building Construction Problem Areas, Iowa Department of Health and Human Services
- 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)
- N.C. Gen. Stat. 143-139.2, Enforcement of insulation requirements; certificate for occupancy
Elm City, NC
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Insulation Pros is an insulation contractor serving North Carolina, Elm City and the rest of Wilson County included.
Reach us
Send the square footage of your Elm City attic, or call (336) 870-3893.