Attic Insulation cost: Knoxville vs Murfreesboro (2026)
Knoxville runs 1% lower than Murfreesboro for attic insulation — expect around $3,600 in Knoxville against $3,650 in Murfreesboro, a difference of about $50.
Knoxville TN
Lower costTypically around $3,600
Murfreesboro TN
Typically around $3,650
Knoxville vs Murfreesboro: full breakdown
| Factor | Knoxville | Murfreesboro |
|---|---|---|
| Typical 2026 cost | $3,600 | $3,650 |
| Estimated range | $1,450–$5,700 | $1,450–$5,800 |
| Labor index (vs US) | ×0.95 | ×0.97 |
| Climate zone | Mixed | Mixed |
| Climate factor | ×1 | ×1 |
| Local permit | None | None |
| Labor share | $2,000 | $2,000 |
| Materials/equipment | $1,600 | $1,650 |
These are 2026 planning figures for attic insulation, localized to each city — not formal quotes.
Is the gap worth worrying about?
A 1% difference on attic insulation is minor — you'll typically see a wider spread just from getting multiple quotes in the same city, so don't let location drive the decision.
Attic insulation by type: Knoxville vs Murfreesboro
We localize each attic insulation type separately for both metros, applying the same labor, climate and permit adjustments each time, so you're comparing like for like.
| Type | Knoxville | Murfreesboro |
|---|---|---|
| Fiberglass batts | $1,450–$3,800 | $1,450–$3,900 |
| Blown-in fiberglass | $1,450–$4,300 | $1,450–$4,350 |
| Blown cellulose | $1,600–$4,750 | $1,650–$4,850 |
| Spray foam | $3,350–$8,550 | $3,400–$8,700 |
These are 2026 planning figures for attic insulation, localized to each city — not formal quotes.
Attic insulation by area: Knoxville vs Murfreesboro
Attic insulation is priced by the square foot of attic floor, typically $1–$7 per sq ft installed depending on material and how deep you build the R-value. Blown-in is cheapest; spray foam costs the most.
| Size | Knoxville | Murfreesboro |
|---|---|---|
| 500 sq ft | $650–$2,100 | $700–$2,150 |
| 1,000 sq ft | $1,150–$3,350 | $1,150–$3,400 |
| 1,500 sq ft | $1,700–$4,750 | $1,750–$4,850 |
| 2,000+ sq ft | $2,300–$6,200 | $2,350–$6,300 |
Localized 2026 planning estimates — not quotes. Each city adjusts the national attic insulation range for local labor, climate and permits.
What insulation pros earn in each metro
With labor making up about 55% of a attic insulation job, wage differences between metros do most of the work here. These figures are real BLS OEWS installer wages, not modeled estimates.
No BLS metro wage series for Knoxville; we use Tennessee regional price parity instead.
Nashville-Davidson--Murfreesboro--Franklin metro · about 6% below the US average installer wage.
Source: U.S. Bureau of Labor Statistics, OEWS metro wages for HVAC installers (used as a trade-labor index).
Cheapest time for attic insulation in either city
The fall insulation rush drives prices up because everyone's thinking about the coming winter at once. Book in spring or summer instead, when demand is lower and rebate funds haven't been claimed yet.
How much insulation is worth paying for?
Insulation is priced on more than thickness. Target R-value, the presence or absence of air-sealing, and the material itself each pull the number in a different direction, and each changes how fast the job pays for itself.
The air-sealing case
Insulation without air-sealing underperforms. Sealing leaks first is cheap and often delivers more comfort per dollar than thicker insulation alone — make sure it's in the scope.
The rebate case
Insulation carries some of the strongest incentive money in remodeling, with utility and state rebates covering a real portion of the cost since the federal 25C credit expired at the end of 2025. Look up what applies on DSIRE, then schedule the work while rebate funds are still unclaimed for the year.
The R-value case
Insulate to the DOE recommendation for your climate zone — under-insulating to save money leaves comfort and energy savings on the table that would have paid the job back.
What makes insulation unusual is that the thorough version and the cheap version are the same version — seal first, meet the DOE R-value for your zone, and layer on the rebates. A partial job just pushes the payback date further out.
Knoxville vs Murfreesboro
Is attic insulation cheaper in Knoxville or Murfreesboro?
Yes — Murfreesboro costs more. Expect around $3,650 for attic insulation there against $3,600 in Knoxville, about $50 (1%) apart in 2026.
Why does attic insulation cost more in Murfreesboro than Knoxville?
Murfreesboro's higher labor index (0.97 vs 0.95 in Knoxville) is the biggest factor, with the mixed/mixed climate split playing a smaller role.
How much is attic insulation in Knoxville, TN?
Expect to pay $1,450 to $5,700 for attic insulation in Knoxville in 2026, averaging around $3,600.
When is the cheapest time to buy attic insulation — and does it differ by city?
No, the seasonal pattern is the same in Knoxville and Murfreesboro: book during Spring and summer for about 5–10% in savings. The pre-winter fall rush is the priciest stretch in both cities, mostly due to emergency replacements.
Should I choose where to live based on attic insulation cost?
Probably not. Yes, $50 is a real gap, but it's a one-time cost you can partly offset in Murfreesboro with off-season timing and tighter bids. Long-term factors like energy prices and home condition matter more than this one number.
Compare attic insulation in other cities
Updated June 2026 · By Serhat Özçelik