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Insulation in Charleston, SC

Compare 3 local insulation pros. Typical service: $1165–$2246.

Top Insulation Companies in Charleston

  1. 1.Palmetto Spray Foam Insulation

    4.7★ (11 reviews)

    4.7★ from 11 reviews

    +18434781492Website

  2. 2.Foam Insulation Solutions LLC

    +18439718332

  3. 3.Energy One America

    +18433886260Website

Insulation Cost in Charleston

Local ranges, adjusted for area wage and cost-of-living data.

ServiceTypical range in Charleston
Attic blown-in insulation$1,165–$2,246/job
Attic spray foam$2,496–$4,992/job

Insulation prices in Charleston run about 17% below the national average, based on what this trade earns in the metro area — so neighbouring cities in the same metro see similar rates.

Quotes on this page come from 3 companies serving Charleston, rated 4.7★ on average across 11 customer reviews.

Charleston Climate & Seasonal Timing

What Charleston's weather means for scheduling insulation.

Last spring frost
February 6
First fall frost
December 23
Annual precipitation
44.42"
Heating degree days
1,736
Cooling degree days
2,375
MonthLowHighPrecip
Jan42.8°56.7°2.94"
Feb45.5°59.6°2.51"
Mar51.6°65°3.3"
Apr58.8°72°2.53"
May67.1°78.7°2.16"
Jun74°84.5°4.65"
Jul76.9°87.6°5.4"
Aug76.1°86.4°6.71"
Sep71.8°82°5.76"
Oct62.5°74.6°3.67"
Nov53.6°67.3°2.19"
Dec45.6°59.5°2.6"

NOAA station data 4.64 miles from Charleston.

Permits & Regulations in SC

  • Residential painting and other specialty work over $500 in South Carolina requires Residential Builders Commission registration
  • Larger remodeling is licensed as residential building
  • Work that disturbs paint in homes built before 1978 must be done by a Lead-Safe Certified firm under the EPA Renovation, Repair and Painting Rule

License required: SC Residential Specialty Contractor registration (work over $500)

Sources: llr.sc.gov, www.epa.gov

Insulation FAQs for Charleston

How much does attic insulation cost in Charleston?

Blown-in attic insulation in Charleston typically runs $1165-$2246 for a 1,000 square foot attic; spray foam costs two to three times more.

How many insulation contractors serve Charleston?

We track 3 insulation contractors serving Charleston.

Is insulation in Charleston more expensive than average?

Installation labor in Charleston runs about -16.8% versus the national average.

How much insulation does a home in Charleston need?

Charleston sees about 1,736 heating degree days and 2,375 cooling degree days a year; the colder the climate, the higher the attic R-value worth paying for.

Does insulation help with Charleston summers?

Yes -- with summer highs near 88F in Charleston, attic insulation cuts the heat load on the air conditioner as much as it holds heat in winter.

Do insulation contractors in SC need a license?

In SC, Residential painting and other specialty work over $500 in South Carolina requires Residential Builders Commission registration. Adding attic insulation in Charleston rarely needs a permit.

Is spray foam worth it in Charleston?

Spray foam earns its price mainly when ducts or an air handler sit in the attic; otherwise blown-in at $1165-$2246 gets most Charleston homes the same R-value for less.

How many quotes should I get for insulation in Charleston?

Two or three; with 3 insulation contractors serving Charleston, compare the R-value and depth each quote installs, not just the price.