Insulation contractors send estimates before almost every job, after measuring the attic, walls, or crawl space and checking existing conditions. Homeowners often collect two or three quotes and compare the price per sq ft, the R-value, the material type, and what prep is included. A clear, itemized quote helps you stand out from a bid that looks cheaper but leaves out air sealing or removal.
When to use estimates: Use estimates to provide project quotes and get client approval before starting work. Once approved, convert your estimate to an invoice with one click to collect payment.
Create an invoice for payment collection
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Invoice_1001_Client_2026-10-14.pdf
Defines exactly what is covered and gives you a basis for adjusting the price if the area differs.
Customers compare bids on these, and a lower price may be for a thinner or lower-grade installation.
Prep work is a common source of disputes and a major difference between bids.
If it is not listed, customers assume it is included, and the cost can be significant.
Conditions found after you start can change the scope, so state how you will handle and price them.
Delays from blocked access cost you time and should be tied to a trip or standby charge.
Material prices change, and a clear expiration date protects your margin.
| Service | Priced | Typical range |
|---|---|---|
| Blown-in attic insulation (fiberglass or cellulose, to R-38 to R-49) | per sq ft | $1.50-3.50 |
| Fiberglass batt insulation (walls or floors) | per sq ft | $1.00-2.50 |
| Open-cell spray foam | per board foot | $0.45-0.90 |
| Closed-cell spray foam | per board foot | $1.00-1.75 |
| Attic air sealing | flat fee | $500-1,800 |
| Removal of old attic insulation | per sq ft | $1.50-3.00 |
| Dense-pack cellulose in existing walls | per sq ft | $2.00-4.50 |
| Minimum job or service charge | flat fee | $300-750 |
Typical US ranges. Rates vary by region, experience, and job size.
Calculate material cost per sq ft at the R-value, add labor time, equipment, travel, and overhead, then add your margin. Use measured dimensions, not guesses based on house size.
Show a couple of R-value or material choices, such as cellulose versus fiberglass or open-cell versus closed-cell foam, so the customer can choose based on budget and performance.
List air sealing, baffles, and removal as separate lines. It shows the value of your work and lets a customer drop an item without confusing the comparison.
A minimum job fee covers small jobs that are not worth the trip, and a 15 to 30 day expiration protects you from material price swings.
Most residential insulation contractors quote for free. Some charge for a full energy audit or blower door test, and some credit the fee toward the job if the customer signs.
State in the quote that hidden issues such as wiring problems, moisture, mold, or vermiculite are not included and will be priced separately after discovery. Get written approval before doing extra work.
Typically 15 to 30 days. Material costs, especially for spray foam, can change, so put an expiration date on the quote.
You can for jobs with unknowns, like wall work in older homes. For standard attic jobs, a fixed price based on measured area is easier for the customer to accept and compare.
Use the Insulation Contractor invoice template to bill the client, or convert this estimate once it's approved.
Insulation Contractor invoice template