Turkey, NC
5 miles west
Median home built 1975 (Warsaw: 1982); Its NOAA station logs about 470 fewer heating degree days than Warsaw's
Attic insulation in TurkeyAttic Insulation in Warsaw, NC
Blown-in attic insulation for Warsaw, NC, in Duplin County, plus removal and air sealing.
About Warsaw and Its Homes
Warsaw grew from a railroad crossroads of 1838 and was incorporated in 1855, on a street plan drawn in 1847. Hill Street has noted Greek Revival and Queen Anne houses of 1885 to 1896, and the district adds hip-roofed houses and bungalows of the early 1900s.
Warsaw, in Duplin County, grew from 2,719 people in 2020 to 2,853 in 2025 (Census Bureau estimates), on 3.22 square miles. That makes Warsaw the second-largest town in Duplin County.
Warsaw has about 1,700 housing units, 7 percent of Duplin County's; about 44 percent of the town's households own their home.
Warsaw at a Glance
- County: Duplin County
- Population: 2,853 (2025), 2,719 (2020), up 4.9%
- Land area: 3.22 square miles (886 people each)
- Housing units: about 1,700 (±198)
- Median year built: 1982 (±5); Duplin County: 1986
- Owner-occupied: 44% (±10); Duplin County: 70%
- Detached houses: 48% (±11); Duplin County: 60%
- Attached houses: under 7%
- Apartments: 39% (±12)
- Mobile homes: 10% (±6)
- Climate zone: 3 on both maps
- ENERGY STAR target for Warsaw attics: R-49 from bare, R-38 over 3 to 4 inches (R-value guide)
Census Bureau estimates for Warsaw, 2020 to 2024 (± margin of error).
Warsaw Homes and Their Attics
Gable Vents and Attic Windows Along Hill Street
The 1996 Warsaw Historic District nomination keeps noting small openings high in the gables of Hill Street houses. An 1889 triple-A house has diamond-shaped vents, an 1896 Queen Anne has louvered openings with peaked hoods, and others have lunette vents and attic windows. Those openings are how many of these attics breathe. Outside air comes in low, at the eaves where there are soffit vents, and leaves high through the gables. So when we add insulation, the gable openings stay open, and baffles keep a clear channel above the insulation at the eaves. Never stuff an old gable vent to stop a draft. Seal the ceiling below it instead.
Attic Insulation in Warsaw
About 30 percent of Warsaw's homes predate 1970; if your joists show above the insulation, ENERGY STAR says to add more insulation.
Built from 1970 to 1989, about 35 percent of Warsaw homes may hold settled fiberglass; check its depth against the joists.
The Local Climate
Warsaw's center sits about 150 feet above sea level, 5 miles from NOAA's Warsaw 5 E station, the best match for Warsaw. The station's 1991 to 2020 normals average about 3,490 heating and 1,420 cooling degree days a year, so at Warsaw's station, heating needs outweigh cooling.
Readings change over short distances around Warsaw: NOAA's Clinton 2 NE station, 11 miles away, averages about 3,020 heating degree days.
Homes by Age: What It Means for the Attic
About 48 percent of Warsaw housing units are detached single-family houses.
From 1990 to 2009, about 30 percent of Warsaw homes were built to codes below ENERGY STAR's target; check their eaves, where ENERGY STAR says insulation is often thinnest.
About 39 percent of Warsaw units sit in buildings of two or more homes, where the attic is often shared. Renters hold about 56 percent of Warsaw's occupied homes, so many attic decisions rest with landlords.
Homes by Year Built
- Before 1940: 7% (±5), about 115 units
- 1940s: under 1%
- 1950s: 15% (±9), about 250 units
- 1960s: 8% (±5), about 135 units
- 1970s: 15% (±7), about 260 units
- 1980s: 21% (±7), about 350 units
- 1990s: 17% (±8), about 285 units
- 2000s: 13% (±8), about 225 units
- 2010s: 3% (±3), about 55 units
- 2020 or later: under 3%, about 15 units
Air Sealing and Duct Sealing in Warsaw
In Warsaw, about 83 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: 83% (±7), about 1,100 households; Duplin County: 77%
- Piped gas: 5% (±4), about 70 households
- Bottled or tank gas: 10% (±7), about 130 households
Power, Gas and Rebates
Duke Energy Progress serves most of Warsaw, Tri-County EMC its edges; your bill says which. For gas, Warsaw is in the Duplin County franchise of Piedmont Natural Gas, whose mains may not reach every street in Warsaw. Duke's free House Call fits many Warsaw homes: about 83 percent heat with electricity.
Rebate to check in Warsaw: Smart $aver Insulate and Seal (Duke Energy; Insulation Pros is an approved trade ally). Before a job in Warsaw, check its current terms; the Duplin County page lists every program.
Attic Insulation Removal in Warsaw
In a Warsaw attic, only wet, moldy or animal-soiled insulation is vacuumed out (ENERGY STAR's test), once the cause is fixed, and after mice that Warsaw attic is sanitized and deodorized; dry, clean insulation stays.
Also Serving Near Warsaw
Nearest to Warsaw first.
Magnolia, NC
7 miles south
875 people, about a third of Warsaw's population
Attic insulation in MagnoliaKenansville, NC
8 miles east
Median home built 1978 (Warsaw: 1982); 814 people, about a quarter of Warsaw's population
Attic insulation in KenansvilleFaison, NC
8 miles north
824 people, about a third of Warsaw's population
Attic insulation in FaisonCalypso, NC
11 miles north
Its NOAA station logs about 370 fewer heating degree days than Warsaw's; 340 people, about an eighth of Warsaw's population
Attic insulation in Calypso
Warsaw Insulation FAQs
Will Warsaw's preservation commission have to sign off before my attic is insulated?
No, the attic itself is outside its reach. Warsaw has a Historic Preservation Commission that rules on work in the town's historic district. State law lets a commission like this judge only what changes on the exterior of a building, never the interior layout. Air sealing and blowing insulation happen entirely indoors. A new roof or gable vent, or a different vent cover, shows from the street, though, and that piece of a job may need the commission's certificate of appropriateness first.
Is the National Register district in Warsaw the same thing as the town's historic district?
They are two different things, and the difference matters. The Warsaw Historic District went on the National Register in 1996, and that federal listing is recognition only: it sets no limits for owners spending their own money. The town's local district is the one with rules, run by the commission. The two need not cover the same lots, so ask town hall for the local map before planning any outside change.
Could the old insulation in a Warsaw attic be vermiculite?
It could: about 20 percent of Warsaw's homes predate 1960. If a Warsaw 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 Warsaw need a permit?
Warsaw Town Hall can say whether Duplin County Building Inspections, the town itself or another office handles permits in Warsaw; ask before work starts.
Helpful Guides
- Power from Duke Energy Progress: high summer electric bills and home energy audits
Sources
Census Bureau figures for Warsaw, NOAA normals for the Warsaw 5 E station, Duke Energy Progress (October 2026). Compiled by Insulation Pros. How the town pages are made.
Sources for the Warsaw notes and questions (read October 20, 2026):
- Warsaw Historic District, National Register nomination (NC HPO)
- Warsaw, in The North Carolina Gazetteer (William S. Powell, 2nd ed., UNC Press 2010), NCpedia
- About Attic Ventilation, ENERGY STAR do-it-yourself guide
- Historic Preservation Commission, Town of Warsaw
- 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
Warsaw, NC
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Insulation Pros is an insulation contractor serving North Carolina, Warsaw and the rest of Duplin County included.
Reach us
Send the square footage of your Warsaw attic, or call (336) 870-3893.