Attic Insulation cost: Knoxville vs New South Memphis (2026)
There's essentially no price gap here: attic insulation runs close to $3,600 in both Knoxville and New South Memphis in 2026.
Knoxville TN
Typically around $3,600
New South Memphis TN
Typically around $3,600
Knoxville vs New South Memphis: full breakdown
| Factor | Knoxville | New South Memphis |
|---|---|---|
| Typical 2026 cost | $3,600 | $3,600 |
| Estimated range | $1,450–$5,700 | $1,450–$5,750 |
| Labor index (vs US) | ×0.95 | ×0.96 |
| Climate zone | Mixed | Mixed |
| Climate factor | ×1 | ×1 |
| Local permit | None | None |
| Labor share | $2,000 | $2,000 |
| Materials/equipment | $1,600 | $1,600 |
These are 2026 planning figures for attic insulation, localized to each city — not formal quotes.
Basically a tie — focus on the contractor
With no real price gap on attic insulation, the choice comes down to contractor quality and timing, not which city you're in.
Attic insulation by type: Knoxville vs New South Memphis
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 | New South Memphis |
|---|---|---|
| Fiberglass batts | $1,450–$3,800 | $1,450–$3,850 |
| Blown-in fiberglass | $1,450–$4,300 | $1,450–$4,350 |
| Blown cellulose | $1,600–$4,750 | $1,650–$4,800 |
| Spray foam | $3,350–$8,550 | $3,350–$8,650 |
Localized 2026 planning estimates — not quotes. Each city adjusts the national attic insulation range for local labor, climate and permits.
Attic insulation by area: Knoxville vs New South Memphis
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 | New South Memphis |
|---|---|---|
| 500 sq ft | $650–$2,100 | $650–$2,100 |
| 1,000 sq ft | $1,150–$3,350 | $1,150–$3,350 |
| 1,500 sq ft | $1,700–$4,750 | $1,750–$4,800 |
| 2,000+ sq ft | $2,300–$6,200 | $2,300–$6,250 |
All figures are 2026 localized planning estimates for attic insulation — get an actual quote before you commit.
What insulation pros earn in each metro
Roughly 55% of what you pay for attic insulation is labor, which is why local wages explain most of the price gap. The numbers below are actual metro wages for skilled installers, sourced from BLS OEWS — not guesses.
No BLS metro wage series for Knoxville; we use Tennessee regional price parity instead.
Memphis metro · about 7% 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
Everyone waits until fall to insulate, which is exactly why fall costs the most. Spring and summer are quieter for installers and often catch a fresh year's rebate budget before it runs dry.
How much insulation is worth paying for?
R-value, air-sealing and material decide both the price and the payback. Our editors on the trade-offs.
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.
The rebate case
Insulation has some of the best rebate math in home improvement — utility and state programs can cover a solid share (the federal 25C credits ended Dec 2025). Check DSIRE before you book and time it to a fresh rebate budget.
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.
Don't half-do an insulation job to save money upfront: seal the air leaks first, insulate to the DOE target for your zone, and stack the rebates. The full scope pays back faster than the partial one.
Knoxville vs New South Memphis
Is attic insulation cheaper in Knoxville or New South Memphis?
There's no meaningful difference: attic insulation runs about $3,600 in both places.
Why does attic insulation cost more in New South Memphis than Knoxville?
It comes down to labor: New South Memphis indexes at 0.96 against Knoxville's 0.95. The mixed-vs-mixed climate difference adds to the gap.
How much is attic insulation in Knoxville, TN?
Knoxville homeowners can expect $1,450 to $5,700 for attic insulation in 2026, with $3,600 the typical number.
When is the cheapest time to buy attic insulation — and does it differ by city?
Timing doesn't change by city here — Spring and summer is the cheapest window in both Knoxville and New South Memphis, saving roughly 5–10%. Avoid the pre-winter fall rush in either location, when emergency replacements push prices up.
Should I choose where to live based on attic insulation cost?
No — the cost is essentially identical between Knoxville and New South Memphis. Base the decision on the things that actually vary: contractor reputation, scope, equipment tier and timing.
Compare attic insulation in other cities
Updated June 2026 · By Serhat Özçelik