Rhodhiss, NC
2 miles south
Power from Duke Energy Carolinas (Granite Falls: a town system); Center about 230 feet lower than Granite Falls'
Attic insulation in RhodhissAttic Insulation in Granite Falls, NC
Blown-in attic insulation for Granite Falls, NC, in Caldwell County, plus removal and air sealing.
About Granite Falls and Its Homes
Granite Falls is named for the falls on Gunpowder Creek, where an iron forge worked in the late 1700s. A cotton mill and the railroad of 1884 then made it a mill and lumber town, and its own mill company was supplying electric power to homes from 1915.
Granite Falls, in Caldwell County, grew from 4,946 people in 2020 to 4,964 in 2025 (Census Bureau estimates), on 4.94 square miles. That makes Granite Falls the third-largest town in Caldwell County.
Granite Falls has about 1,800 housing units, 5 percent of Caldwell County's; about 66 percent of the town's households own their home.
Granite Falls at a Glance
- County: Caldwell County
- Population: 4,964 (2025), 4,946 (2020), up 0.4%
- Land area: 4.94 square miles (1,005 people each)
- Housing units: about 1,800 (±149)
- Median year built: 1991 (±4); Caldwell County: 1980
- Owner-occupied: 66% (±9); Caldwell County: 74%
- Detached houses: 62% (±8); Caldwell County: 73%
- Attached houses: 4% (±3)
- Apartments: 24% (±8)
- Mobile homes: 10% (±7)
- Climate zone: 4 on both maps
- ENERGY STAR target for Granite Falls attics: R-60 from bare, R-49 over 3 to 4 inches (R-value guide)
Census Bureau estimates for Granite Falls, 2020 to 2024 (± margin of error).
Granite Falls Homes and Their Attics
Electric Power From the Mill After 1915
Granite Falls Manufacturing, the Shuford mill company, put money into a power plant in 1888 and lit the county's first electric lights. From 1915 it also sold electricity for homes and businesses, the county's history notes. So a house here could have been wired in the years when knob-and-tube was in use, which ENERGY STAR places before about 1930 and warns is a fire risk under insulation. If old porcelain knobs or cloth-covered wire turn up between the ceiling joists, an electrician checks whether the circuit is live before any insulation is added. A live run stays uncovered.
Attic Insulation in Granite Falls
About 25 percent of Granite Falls' 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 Granite Falls homes were built to codes below ENERGY STAR's target; check their eaves, where ENERGY STAR says insulation is often thinnest.
The Local Climate
Granite Falls' center sits about 1,200 feet above sea level, 5 miles from NOAA's Hickory Airport station, the best match for Granite Falls. The station's 1991 to 2020 normals average about 3,550 heating and 1,400 cooling degree days a year, so at Granite Falls' station, heating needs outweigh cooling.
Readings change over short distances around Granite Falls: NOAA's Lenoir station, 10 miles away, averages about 3,850 heating degree days.
Homes by Age: What It Means for the Attic
About 62 percent of Granite Falls housing units are detached single-family houses.
Built from 1970 to 1989, about 20 percent of Granite Falls homes may hold settled fiberglass; check its depth against the joists.
About 35 percent of Granite Falls' housing units predate 1980; nearly all predate the state's 1978 insulation rule too.
Homes by Year Built
- Before 1940: 8% (±3), about 145 units
- 1940s: 4% (±3), about 75 units
- 1950s: 5% (±3), about 85 units
- 1960s: 9% (±5), about 165 units
- 1970s: 7% (±3), about 120 units
- 1980s: 16% (±5), about 280 units
- 1990s: 24% (±7), about 430 units
- 2000s: 23% (±9), about 410 units
- 2010s: 5% (±3), about 90 units
- 2020 or later: under 1%
Air Sealing and Duct Sealing in Granite Falls
In Granite Falls, about 64 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: 64% (±8), about 1,100 households; Caldwell County: 70%
- Piped gas: 30% (±7), about 510 households
- Bottled or tank gas: 4% (±3), about 75 households
- Oil or kerosene: under 4%, about 30 households
Power, Gas and Rebates
Granite Falls, an ElectriCities public power town, runs its own electric system. For gas, Granite Falls is in the Caldwell County franchise of Piedmont Natural Gas, and about 30 percent of the town's homes heat with piped gas.
Program to ask about in Granite Falls: 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 Granite Falls, check its current terms; the Caldwell County page lists every program.
Attic Insulation Removal in Granite Falls
In a Granite Falls attic, only wet, moldy or animal-soiled insulation is vacuumed out (ENERGY STAR's test), once the cause is fixed, and after mice that Granite Falls attic is sanitized and deodorized; dry, clean insulation stays.
Also Serving Near Granite Falls
Nearest to Granite Falls first.
Sawmills, NC
3 miles northwest
Median home built 1990 (Granite Falls: 1991); Its NOAA station logs about 300 more heating degree days than Granite Falls'
Attic insulation in SawmillsHudson, NC
5 miles northwest
Median home built 1978 (Granite Falls: 1991)
Attic insulation in HudsonConnelly Springs, NC
5 miles southwest
Median home built 1987 (Granite Falls: 1991); 1,550 people, about a third of Granite Falls' population
Attic insulation in Connelly SpringsHildebran, NC
5 miles south
1,691 people, about a third of Granite Falls' population
Attic insulation in Hildebran
Granite Falls Insulation FAQs
Is my old Granite Falls house listed as historic anywhere?
Not on the state's list. Granite Falls has no entry on the state preservation office's National Register list, and that office's 2023 roster of local historic commissions shows nothing in Caldwell County. The 1987 county survey did record a few buildings here, such as the brick Methodist church of 1908, but a survey file is not a listing and sets no rules. Nothing about historic status stands in the way of attic work.
My Granite Falls house has an old brick chimney in the attic. How is that handled?
Carefully, with metal rather than foam. The post office took the Granite Falls name in 1887, and if your house goes back to those early decades, its chimney may pass straight through the ceiling into the attic. That opening is a leak. A strip of aluminum flashing, bedded in heat-proof caulk, closes it. Then a metal collar keeps loose insulation a short distance off the masonry, which ENERGY STAR puts at 2 inches under most codes. The insulation is filled in up to the collar and no closer.
Does attic insulation in Granite Falls need a permit?
Granite Falls Town Hall can say whether Caldwell County Building Permits & Inspections, the town itself or another office handles permits in Granite Falls; ask before work starts.
Helpful Guides
- Climate zone 4: attic stairs and hatches
- An energy audit program from the town's own utility: home energy audits
Sources
Census Bureau figures for Granite Falls, NOAA normals for the Hickory Airport station, Granite Falls' municipal electric system (October 2026). Compiled by Insulation Pros. How the town pages are made.
Sources for the Granite Falls notes and questions (read October 20, 2026):
- History, Town of Granite Falls
- Granite Falls, in The North Carolina Gazetteer (William S. Powell, 2nd ed., UNC Press 2010), NCpedia
- Historical and Architectural Development of Caldwell County (Caldwell County survey report, 1987), NC State Historic Preservation Office
- Our Story: Growth and Industry, 1880-1899, Caldwell County
- Our Story: Community and Change, 1900-1919, Caldwell County
- 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)
- Furnace Flues Require Special Sealing Techniques, ENERGY STAR do-it-yourself guide
Granite Falls, NC
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Insulation Pros is an insulation contractor serving North Carolina, Granite Falls and the rest of Caldwell County included.
Reach us
Send the square footage of your Granite Falls attic, or call (336) 870-3893.