Is spray foam more expensive than fiberglass?

Up front, yes — typically 2–3x. But spray foam air-seals at the same time it insulates, so the energy savings are larger and the payback is usually 4–8 years in the Quad Cities climate.

Why does closed-cell cost more than open-cell?

Closed-cell uses denser chemistry, more raw material per board foot, and gives you R-7 per inch plus a vapor barrier. Open-cell is R-3.7 per inch and breathable, so the per-board-foot price is roughly a third.

Is financing available?

Yes, we offer financing for jobs over $2,500. We'll walk you through the options at the time of quote.

How accurate are online spray foam calculators?

Not very. Real pricing depends on access, prep, removal of existing insulation, and which type of foam goes where. A 15-minute on-site walkthrough beats any calculator.

Spray Foam Insulation Cost in 2026: Real Quad Cities Pricing

Spray foam insulation cost is the first question almost every homeowner asks, and almost every blog answers it with a useless national average. Here's what real Quad Cities jobs actually cost in 2026 — broken out by application, with the math behind it.

The short answer

Most full-home spray foam projects in the Quad Cities run between $3,500 and $12,000, depending on what gets foamed. Per board foot, installed pricing is roughly $0.50–$0.80 for open-cell and $1.50–$2.20 for closed-cell. Anyone quoting wildly outside those ranges around here is either cutting corners or marking up heavily.

Cost by application

Here are real 2026 ranges from jobs we've quoted across Bettendorf, Davenport, Moline, and Rock Island. Your number will land somewhere in the band — the on-site walkthrough is what pins it down.

Rim joists (typical 2,000 sq ft home): $900 – $1,800. The cheapest spray foam job, and the highest ROI in our climate. If you do one thing this year, do this.
Attic, open-cell roof deck (1,200 sq ft): $2,800 – $5,500.
Crawl space encapsulation (1,000 sq ft): $4,000 – $8,500. Includes vapor barrier, sealing vents, closed-cell on walls and rim.
Basement walls, closed-cell (1,200 sq ft): $4,500 – $9,000.
Pole barn (30×40, walls + roof): $7,000 – $14,000.
Whole-home retrofit: $12,000 – $25,000+. Rare — most homeowners stage this across 2–3 years.

Why prices vary so much by city

Pricing isn't actually different city to city — labor and material are the same whether the job is in Bettendorf or Davenport. What does change is the typical home and what it needs.

A Davenport job in the older McClellan Heights or Vander Veer neighborhoods often means working around plaster walls and 1920s framing — slower prep, more masking, sometimes $500–$1,500 more than the same square footage in a newer build. A Bettendorf crawl space on the Forest Grove hillsides usually needs more closed-cell on hillside foundation walls than a flat slab in Pleasant Valley.

For crawl space encapsulation in Moline or Rock Island, expect a wider range — river-bluff homes often have asymmetric crawls that take longer to seal than a textbook rectangular one.

What drives the price (more than square footage)

Foam type and thickness. Closed-cell at 2″ is ~3x the material cost of open-cell at 3″ for the same R-value.
Access. A walk-in attic is fast. A 24″ scuttle hatch with knee walls is not.
Removal of existing insulation. Old fiberglass or cellulose removal can add $500–$2,000.
Prep and masking. Tight, finished spaces (basement walls inside a furnished basement) take 2–3x the prep time of an unfinished crawl.
Site travel. Within the Quad Cities — no charge. Outside the core six cities, a small travel fee may apply.

The real math: payback period

A $5,000 attic foam job in the Quad Cities typically saves $60–$110/month on heating and cooling vs an old fiberglass attic. Add the 30% federal 25C tax credit (up to $1,200) and Iowa utility rebates that often kick in another $300–$600, and most jobs net out at $3,000–$3,500 cash out of pocket. At ~$85/month savings, that's a 3.5–4 year payback — and then it's free money for the next 20–80 years foam keeps performing.

How to get a real quote that matches your house

Skip the calculator. Have us do a 15-minute walkthrough — we'll measure, look at access, identify existing insulation, and give you a written number on the spot. Book a free estimate and we'll come take a look.

See pricing context by city: Bettendorf, Davenport, Moline, Rock Island, LeClaire, Pleasant Valley.