Enter the project’s square footage, pick a material — fiberglass batts, blown-in, mineral wool, open-cell or closed-cell spray foam — add air sealing or old-insulation removal if the job needs it, and get a competitive 2026 price range in seconds. Then hand the customer a branded estimate before they call the next insulation contractor.
Insulation costs $0.80–$4.50 per square foot installed in 2026, depending on the material: fiberglass batts run $0.80–$2.60, blown-in cellulose or fiberglass $0.90–$2.40, mineral wool (rockwool) $1.40–$4.00, open-cell spray foam $1.50–$3.50, and closed-cell spray foam $1.75–$4.50. Air sealing adds $0.50–$2.00 per square foot, a radiant barrier $0.30–$2.00, and tearing out old insulation $1–$2, while large commercial and new-construction jobs price 10–20% lower per foot at scale. A typical 1,000 sq ft attic of blown-in lands around $900–$2,400. The calculator below prices it instantly by square footage and material, and QuoteIQ turns the result into a sendable, branded estimate — or an online self-quote your customers run themselves. Plans start at $29.99/mo.
Insulation jobs are priced by the square foot: the area times a per-foot rate for the chosen material, plus add-ons for air sealing, a radiant barrier, or removing old insulation. The formula: area × material rate × scale factor = base price. The material you install is the biggest lever — a fiberglass batt and a closed-cell spray foam can differ by 5× per square foot — and the target R-value is the wildcard, because a higher R-value means more depth, more material, and more labor before the job is done. The calculator above uses the 2026 U.S. market ranges below; your material grade, target R-value, and local labor decide where you land inside each band.
| Material / add-on | Typical 2026 rate (per sq ft, installed) |
|---|---|
| Fiberglass batts / rolls | $0.80 – $2.60 |
| Blown-in cellulose / fiberglass | $0.90 – $2.40 |
| Mineral wool / rockwool | $1.40 – $4.00 |
| Open-cell spray foam | $1.50 – $3.50 |
| Closed-cell spray foam | $1.75 – $4.50 |
| Air sealing (add-on) | $0.50 – $2.00 |
| Radiant barrier (add-on) | $0.30 – $2.00 |
| Remove old insulation (add-on) | $1.00 – $2.00 |
Removal and prep are the silent margin killers. Bidding a clean blown-in number over an attic that’s packed with old, rodent-soiled batts — without pricing the tear-out and bagging as its own line — is how an easy job turns into a break-even day of hauling. Quote the removal, or the dumpster eats the profit.
Three factors move every quote beyond the material itself: target R-value (a code-required R-49 attic needs far more depth and material than an R-30 top-up), job condition (an attic with old insulation, moisture, or pest damage needs tear-out, air sealing, and sometimes a vapor or radiant barrier before new insulation goes in), and scale — large commercial and new-construction jobs price 10–20% lower per square foot because mobilization, material, and crew costs spread across more area and open walls install faster, which is why the calculator’s Commercial toggle applies a 15% reduction. For benchmarks on managing job costs and margins, the U.S. Small Business Administration is blunt: price from your costs, not your competitors’.
A $3,000 spray foam job isn’t $3,000 in your pocket. Foam sets and drums, machine and rig fuel, hoses and protective gear, labor, the dump fees for old insulation, and the windshield time to the job all come out first — and insulation margins live or die on material yield and board-foot waste, not on any single quote. The SBA’s guidance on managing finances is blunt: track cost per job, not per month.
If the calendar is full but the bank account isn’t growing, the quotes weren’t the problem — under-priced removal and wasted foam were. QuoteIQ Job Costing attaches material, labor, and disposal to every job so you see real margin per attic, not a guess.
Insulation work is a trust game: the contractor who shows up with a clear, professional number usually wins the job. Inside QuoteIQ, the price you just calculated becomes a branded estimate sent from the job site, a slot on the schedule, and an invoice that collects card payment the day the crew packs up — and customer self-quoting puts this same square-foot logic on your website so homeowners price their own attic and book while you’re on another job.
Review Multiplier turns finished jobs into Google reviews automatically — the social proof that sells the next install. QuoteIQ serves insulation contractors among 50+ home service industries — and if you run other services too, try the free lawn care, pressure washing, and tree removal calculators, the detailing price list template, or browse all our free tools.
Comparing platforms before you commit? Insulation estimating software prices batts, blown-in, and air sealing on one bid, and this ranking of software for insulation businesses compares the leading platforms side by side.
Turn this estimate into a branded, sendable quote in about 60 seconds — or put this calculator’s logic on your own website with customer self-quoting, then run the schedule, the invoice, and the review request without leaving QuoteIQ. Plans start at $29.99/mo.
“QuoteIQ makes managing clients for pressure washing seamless, saving time while keeping every detail organized efficiently.”
Verified App Store ReviewInsulation costs $0.80–$4.50 per square foot installed in 2026, depending on the material: fiberglass batts run $0.80–$2.60, blown-in cellulose or fiberglass $0.90–$2.40, mineral wool (rockwool) $1.40–$4.00, open-cell spray foam $1.50–$3.50, and closed-cell spray foam $1.75–$4.50. A typical 1,000 sq ft attic of blown-in lands around $900–$2,400, and extras — air sealing ($0.50–$2.00 per sq ft) or removing old insulation ($1–$2) — are the most common reason a quote climbs. Enter your square footage and material in the calculator above and the range updates instantly, then send it as a branded quote through QuoteIQ.
Insulating an attic — about 1,000–1,500 sq ft of floor — costs roughly $1,500–$6,000 in 2026, depending on material and target R-value. At 1,000 sq ft, blown-in runs about $900–$2,400, fiberglass batts $800–$2,600, and closed-cell spray foam $1,750–$4,500. Old insulation is the wildcard: removing rodent-soiled or wet batts adds $1–$2 per sq ft, and air sealing penetrations first adds $0.50–$2.00. Price your exact attic in the calculator above.
Spray foam insulation costs $1.50–$4.50 per square foot installed in 2026: open-cell runs $1.50–$3.50 and closed-cell $1.75–$4.50. Closed-cell is the more expensive of the two because it delivers a higher R-value per inch (about R-6 to R-7) and acts as its own air and vapor barrier, while open-cell (about R-3.5 per inch) is cheaper and softer. For a 1,000 sq ft attic that is roughly $1,500–$4,500. If the budget is tight, blown-in ($0.90–$2.40 per sq ft) covers more area for less. Compare them side by side in the calculator above.
Blown-in insulation costs $0.90–$2.40 per square foot installed, including the loose-fill cellulose or fiberglass, the blowing labor, and basic fixture damming. It is the most popular attic top-up because it fills irregular cavities fast and reaches a target R-value with less labor than batts. A 1,000 sq ft attic runs about $900–$2,400, before any air sealing or removal of old material. Choose Blown-in in the calculator above to price your square footage.
Closed-cell spray foam costs $1.75–$4.50 per square foot installed — often two to three times more than fiberglass batts ($0.80–$2.60) — but the premium buys performance: a higher R-value per inch (about R-6 to R-7), a built-in air and vapor barrier, and structural rigidity in walls and rim joists. Whether it is worth it usually comes down to the space — tight rim joists, vans, and humid crawl spaces favor closed-cell, while a simple attic top-up rarely needs it. Compare it against batts and blown-in in the calculator.
Contractors price by the square foot: area times a per-foot rate for the chosen material, plus add-ons. The formula is area × material rate × a scale factor, with extras for air sealing ($0.50–$2.00 per sq ft), a radiant barrier ($0.30–$2.00), or removing old insulation ($1–$2). Target R-value drives the rest, since a deeper, higher-R install uses more material and labor. Large commercial and new-construction jobs price 10–20% lower per square foot because fixed costs spread across more area. If you are setting your own rates, build from your costs — foam sets or rolls, machine fuel, labor, dump fees, insurance — then check against the market table on this page and track real margin per job with QuoteIQ Job Costing.
QuoteIQ is the best software for insulation contractors because it runs the whole job from one app: customer self-quoting puts a square-foot price calculator on your website so leads book themselves, quotes send from the job site, jobs land on the schedule, invoices collect card payment when the crew packs up, job costing tracks material, labor, and disposal against every job, and Review Multiplier turns finished installs into Google reviews automatically — all rated 4.7 stars across 4,100+ reviews and serving insulation contractors among 50+ home service industries. Plans start at $29.99/mo, below comparable Jobber and Housecall Pro tiers and a fraction of ServiceTitan. Book a free demo to see it on your own pricing.
Yes — the calculator on this page is free to use and works on any phone or tablet, which helps when you are quoting a job standing in the customer’s attic. Enter the square footage, pick a material, add air sealing or removal if the job needs it, and get an instant range; the first time you download or print an estimate, enter your first name and email once and it is unlocked on this device for good. When you are ready to send branded quotes and collect payment, QuoteIQ offers a 14-day free trial on every plan, and a credit or debit card is required to start. Start a trial or keep using the calculator as often as you like.
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