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Insulation in Knoxville, TN

Compare 6 local insulation pros. Typical service: $1165–$2246.

Top Insulation Companies in Knoxville

  1. 1.Crawl Space Ninja

    4.9★ (638 reviews)

    4.9★ from 638 reviews

    +18654173953Website

  2. 2.Koala Insulation of Greater Knoxville

    5.0★ (443 reviews)

    5.0★ from 443 reviews

    +18654179005Website

  3. 3.RetroFoam of East Tennessee

    4.8★ (104 reviews)

    4.8★ from 104 reviews

    +18652522006Website

  4. 4.One Way Air

    4.9★ (45 reviews)

    4.9★ from 45 reviews

    +18652032302Website

  5. 5.Valor Insulation LLC

    4.5★ (8 reviews)

    4.5★ from 8 reviews

  6. 6.Insulation Commandos of Knoxville

    5.0★ (3 reviews)

    5.0★ from 3 reviews

    +18653462814Website

Insulation Cost in Knoxville

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

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

Insulation prices in Knoxville 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 6 companies serving Knoxville, rated 4.9★ on average across 1,241 customer reviews.

Knoxville Climate & Seasonal Timing

What Knoxville's weather means for scheduling insulation.

Last spring frost
April 11
First fall frost
October 30
Annual precipitation
51.93"
Heating degree days
3,955
Cooling degree days
1,339
MonthLowHighPrecip
Jan27.2°47°4.84"
Feb29.6°51.6°4.63"
Mar36.1°61°4.64"
Apr43.7°69.8°4.31"
May53.4°77.6°4.8"
Jun62.6°84.9°3.9"
Jul66.8°87.8°5.57"
Aug65.5°87.5°3.35"
Sep58.2°82.1°3.74"
Oct46°71.5°2.84"
Nov36.3°60.4°4.24"
Dec29.7°49.5°5.07"

NOAA station data 5.01 miles from Knoxville.

Permits & Regulations in TN

  • Residential remodeling in Tennessee requires a home improvement license between $3,000 and $25,000 in participating counties, and a contractor license at $25,000 and above
  • Painting-only work below those thresholds needs no state license
  • 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: Tennessee home improvement license ($3,000-$25,000) or contractor license ($25,000+)

Sources: www.tn.gov, www.epa.gov

Insulation FAQs for Knoxville

How much does attic insulation cost in Knoxville?

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

How many insulation contractors serve Knoxville?

We track 6 insulation contractors serving Knoxville.

Is insulation in Knoxville more expensive than average?

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

How much insulation does a home in Knoxville need?

Knoxville sees about 3,955 heating degree days and 1,339 cooling degree days a year; the colder the climate, the higher the attic R-value worth paying for.

Does insulation help with Knoxville summers?

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

Do insulation contractors in TN need a license?

In TN, Residential remodeling in Tennessee requires a home improvement license between $3,000 and $25,000 in participating counties, and a contractor license at $25,000 and above. Adding attic insulation in Knoxville rarely needs a permit.

Is spray foam worth it in Knoxville?

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

How many quotes should I get for insulation in Knoxville?

Two or three; with 6 insulation contractors serving Knoxville, compare the R-value and depth each quote installs, not just the price.