Dunn, NC
7 miles southwest
Power from Duke Energy Progress (Benson: a town system)
Attic insulation in DunnAttic Insulation in Benson, NC
Blown-in attic insulation for Benson, NC, 7 miles from Dunn, plus removal and air sealing.
About Benson and Its Homes
Benson was incorporated in 1887, after a rail line from Contentnea to Fayetteville passed through, and it grew into a trading town for the farms around it. Its historic district holds mostly buildings from about 1900 to 1930, yet the larger share of its homes date from 1970 on.
Benson, in Johnston County, grew from 4,007 people in 2020 to 4,660 in 2025 (Census Bureau estimates), on 2.99 square miles. That makes Benson the fifth-largest town in Johnston County.
Benson has about 2,100 housing units, 2 percent of Johnston County's; about 55 percent of the town's households own their home.
Benson at a Glance
- County: Johnston County
- Population: 4,660 (2025), 4,007 (2020), up 16.3%
- Land area: 2.99 square miles (1,559 people each)
- Housing units: about 2,100 (±300)
- Owner-occupied: 55% (±8); Johnston County: 76%
- Detached houses: 69% (±4); Johnston County: 76%
- Attached houses: 7% (±6)
- Apartments: 22% (±10)
- Mobile homes: under 5%
- Climate zone: 3 on both maps
- ENERGY STAR target for Benson attics: R-49 from bare, R-38 over 3 to 4 inches (R-value guide)
Census Bureau estimates for Benson, 2020 to 2024 (± margin of error).
Benson Homes and Their Attics
Triple-A Houses Around Main and Church Streets
The Benson Historic District's 1985 nomination found one plain house form far more often than any other: the one-story frame Triple-A. It is a side-gabled house with a third gable centered over a full-width front porch, built here from about 1900 to 1925. The entries keep pointing to louvered vents set high in those gables, some round, some diamond or quatrefoil shaped. Those louvers are part of how the attic breathes. Fresh air enters along the soffits, rises, and leaves through the ridge or the gable openings. When we add insulation, the gable louvers stay open and the eaves stay clear, so the attic can keep shedding summer heat and moisture.
Attic Insulation in Benson
About 30 percent of Benson's homes predate 1970; if your joists show above the insulation, ENERGY STAR says to add more insulation.
From 1990 to 2009, about 25 percent of Benson homes were built to codes below ENERGY STAR's target; check their eaves, where ENERGY STAR says insulation is often thinnest.
The Local Climate
Benson's center sits about 240 feet above sea level, 9 miles from NOAA's Dunn 4 NW station, the best match for Benson. The station's 1991 to 2020 normals average about 2,910 heating and 1,970 cooling degree days a year, so Benson attics work in both seasons.
Homes by Age: What It Means for the Attic
Some 69 percent of Benson housing units are detached single-family houses.
Built from 1970 to 1989, about 25 percent of Benson homes may hold settled fiberglass; check its depth against the joists.
About 40 percent of Benson's housing units predate 1980; nearly all predate the state's 1978 insulation rule too.
Homes by Year Built
- Before 1940: 10% (±6), about 205 units
- 1940s: 4% (±3), about 80 units
- 1950s: 9% (±5), about 195 units
- 1960s: 5% (±4), about 110 units
- 1970s: 14% (±7), about 285 units
- 1980s: 10% (±6), about 215 units
- 1990s: 6% (±5), about 130 units
- 2000s: 21% (±10), about 440 units
- 2010s: 18% (±8), about 370 units
- 2020 or later: 3% (±2), about 55 units
Air Sealing and Duct Sealing in Benson
In Benson, 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% (±8), about 1,440 households; Johnston County: 78%
- Piped gas: 18% (±7), about 310 households
Power, Gas and Rebates
Benson, an ElectriCities public power town, runs its own electric system. For gas, Benson is in the Johnston County franchise of Piedmont Natural Gas, and about 18 percent of the town's homes heat with piped gas.
Program to ask about in Benson: ElectriCities energy audits (the town's electric system), home energy audits for member-town customers; ask the town's utility office. Before a job in Benson, check its current terms; the Johnston County page lists every program.
Attic Insulation Removal in Benson
In a Benson attic, only wet, moldy or animal-soiled insulation is vacuumed out (ENERGY STAR's test), once the cause is fixed, and after mice that Benson attic is sanitized and deodorized; dry, clean insulation stays.
Also Serving Near Benson
Nearest to Benson first.
Newton Grove, NC
14 miles southeast
600 people, about an eighth of Benson's population
Attic insulation in Newton Grove
Benson Insulation FAQs
Does Benson's historic district have rules about attic work?
Not for the attic. Benson's district joined the National Register in 1985. The State Historic Preservation Office notes that listing by itself restricts nothing a private owner chooses to do at private cost. The office's 2023 list does name a Benson Historic Preservation Commission. In a district a town designates locally, state law has such a commission review outside changes only, not interior arrangement. Insulation work stays inside. Before any new vent goes through the roof, check with the town.
My old Benson house has an enclosed back porch. Is there an attic over it?
There can be a separate one. The 1985 survey of Benson's district records porches that owners later closed in, along with rear ells and kitchen wings added behind the main house. Each of those roofs can cover its own shallow attic, reached by its own hatch or not at all. We look into every roof section, then spread insulation evenly over each one so no low spots are left.
Could the old insulation in a Benson attic be vermiculite?
It could: about 25 percent of Benson's homes predate 1960. If a Benson 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 Benson need a permit?
Benson Town Hall can say whether Johnston County Building Inspections Department, the town itself or another office handles permits in Benson; ask before work starts.
Helpful Guides
- Hot summers at NOAA's Dunn 4 NW station: radiant barriers
- An energy audit program from the town's own utility: home energy audits
Sources
Census Bureau figures for Benson, NOAA normals for the Dunn 4 NW station, Benson's municipal electric system (October 2026). Compiled by Insulation Pros. How the town pages are made.
Sources for the Benson notes and questions (read October 20, 2026):
- Benson Historic District, National Register nomination (NC HPO)
- Benson, in The North Carolina Gazetteer (William S. Powell, 2nd ed., UNC Press 2010), NCpedia
- Year Structure Built (table B25034), Benson town, American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau via Census Reporter
- About Attic Ventilation, ENERGY STAR do-it-yourself guide
- 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. 160D-947, Certificate of appropriateness required
- Adding Attic Insulation, ENERGY STAR do-it-yourself guide
Benson, NC
Open in Google Maps (opens in a new tab)Serving Benson, NC
Insulation Pros is an insulation contractor serving North Carolina, Benson and the rest of Johnston County included.
Reach us
Send the square footage of your Benson attic, or call (336) 870-3893.