Spray Foam Insulation cost: Collierville vs Knoxville (2026)
Spray foam insulation costs about the same in Collierville and Knoxville in 2026 — roughly $3,600 in each.
Collierville TN
Typically around $3,600
Knoxville TN
Typically around $3,600
Collierville vs Knoxville: full breakdown
| Factor | Collierville | Knoxville |
|---|---|---|
| Typical 2026 cost | $3,600 | $3,600 |
| Estimated range | $1,450–$5,750 | $1,450–$5,700 |
| Labor index (vs US) | ×0.96 | ×0.95 |
| Climate zone | Mixed | Mixed |
| Climate factor | ×1 | ×1 |
| Local permit | None | None |
| Labor share | $2,000 | $2,000 |
| Materials/equipment | $1,600 | $1,600 |
All figures are 2026 localized planning estimates for spray foam insulation — get an actual quote before you commit.
A wash — choose on quality, not city
This is a statistical tie on spray foam insulation cost, so let contractor reputation and project timing decide, not geography.
Spray foam insulation by type: Collierville vs Knoxville
Every spray foam insulation type gets its own localized price for each metro, using the same labor, climate and permit adjustments — a true apples-to-apples comparison.
| Type | Collierville | Knoxville |
|---|---|---|
| Open-cell | $1,450–$4,350 | $1,450–$4,300 |
| Closed-cell | $2,400–$6,750 | $2,400–$6,650 |
Spray foam insulation numbers here are 2026 planning ranges, adjusted per city — useful for budgeting, not a substitute for an actual quote.
Spray foam insulation by area: Collierville vs Knoxville
Spray foam is priced by board foot (1 sq ft at 1 inch thick), which works out to about $1.50–$5 per sq ft of surface installed depending on foam type and thickness. Closed-cell costs more but adds twice the R-value per inch.
| Size | Collierville | Knoxville |
|---|---|---|
| 500 sq ft | $850–$2,300 | $850–$2,300 |
| 1,000 sq ft | $1,450–$3,850 | $1,450–$3,800 |
| 1,500 sq ft | $2,100–$5,300 | $2,100–$5,250 |
| 2,000+ sq ft | $2,700–$6,250 | $2,650–$6,200 |
Treat these as 2026 localized estimates for spray foam insulation, not quotes from a contractor.
What insulation pros earn in each metro
Labor is about 55% of a spray foam insulation bill, so local wages drive most of the gap. These are real metro hourly wages for skilled installers (BLS OEWS), not estimates.
Memphis metro · about 7% below the US average installer wage.
No BLS metro wage series for Knoxville; we use Tennessee regional price parity instead.
Source: U.S. Bureau of Labor Statistics, OEWS metro wages for HVAC installers (used as a trade-labor index).
Cheapest time for spray foam insulation in either city
Demand for insulation spikes every fall as winter approaches, pushing prices with it. Spring and summer avoid that crowd, and utility rebate pools are frequently still fresh that early in the year.
How much insulation is worth paying for?
Three choices shape an insulation budget — target R-value, whether air-sealing is included, and material type. Our editors weigh how each affects payback.
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
Skip air-sealing and you're insulating around the very holes letting conditioned air leak out. Caulk, foam and weatherstripping are inexpensive and often return more felt comfort than a thicker blanket of insulation ever would — insist the crew handles the leaks before they bury them.
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.
Of every home upgrade, insulation rewards doing it right the most: air-seal first, meet the DOE R-value for your climate zone, and use the rebates on the table. Cutting the scope here just delays the payback.
Collierville vs Knoxville
Is spray foam insulation cheaper in Collierville or Knoxville?
Not really — both cities land at almost the same number for spray foam insulation, around $3,600 each.
Why does spray foam insulation cost more in Knoxville than Collierville?
It comes down to labor: Knoxville indexes at 0.95 against Collierville's 0.96. The mixed-vs-mixed climate difference adds to the gap.
How much is spray foam insulation in Collierville, TN?
In Collierville, spray foam insulation typically runs $1,450–$5,750 in 2026, with most homeowners paying around $3,600.
When is the cheapest time to buy spray foam insulation — and does it differ by city?
The best window is the same in both Collierville and Knoxville: Spring and summer, when demand drops and installers discount to keep crews busy — typically 5–10% off peak pricing. The most expensive time anywhere is an emergency replacement during the pre-winter fall rush.
Should I choose where to live based on spray foam insulation cost?
No — the cost is essentially identical between Collierville and Knoxville. Base the decision on the things that actually vary: contractor reputation, scope, equipment tier and timing.
Compare spray foam insulation in other cities
Updated June 2026 · By Serhat Özçelik