Spray Foam Cost Calculator

Enter your square footage and project type for an instant Arkansas price estimate — then get a free on-site quote to lock in the real number.

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Spray Foam Cost Calculator: The Short Answer

This spray foam cost calculator covers what most Arkansas spray foam jobs run: $1,500–$5,500 for an attic or crawl space, and $1.50–$3.30 per square foot for whole-building work. Open-cell prices around $0.45–$0.75 per board foot, closed-cell around $1.00–$1.65 per board foot. Use the calculator below for an estimate based on your project.

This tool gives a planning-stage range, not a quote. See the full 2026 pricing guide for what drives your number up or down.

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Estimate your project

$2,500 – $4,200

Estimated installed cost for a 1,500 sq ft attic roofline, open-cell foam

—Low $/sq ft
—High $/sq ft
—Removal add-on

Planning estimate only, based on typical Arkansas installed pricing. Actual cost depends on access, thickness, and site conditions — get a free on-site quote for a firm number.

How this estimate is built

The calculator uses installed per-square-foot ranges pulled from real 2026 Arkansas job pricing, broken out by project type and foam type. Closed-cell runs roughly 40–60% higher than open-cell per square foot because it costs more per board foot and is often applied for its vapor and structural properties, not just R-value. Removal of old insulation adds $0.50–$1.00 per square foot on top when selected.

Project typeOpen-cell $/sq ftClosed-cell $/sq ft
Attic roofline$1.65–$2.80$2.60–$4.20
Crawl space encapsulation$1.90–$3.10$2.80–$4.80
Rim joist only$1.40–$2.30$2.20–$3.60
Whole-house new construction$2.20–$3.90$3.60–$6.20
Metal building / pole barn$1.80–$3.00$2.90–$5.00
Barndominium shell$2.60–$4.40$4.00–$7.00

For the full breakdown of what moves these numbers — thickness, access, and code items — see the complete cost guide.

Why your real quote can differ

This calculator gives a planning-stage range, not a bid. It can’t see your attic’s headroom, your crawl space’s clearance, whether the existing insulation needs to come out first, or whether an ignition barrier is required by code. Those site-specific factors are exactly what a free on-site estimate is for.

  • Access and headroom in the attic or crawl space
  • Exact finished thickness needed to hit your R-value target
  • Ignition barrier or intumescent coating requirements
  • Condition of existing framing, ductwork, or wiring in the space

Calculator FAQ

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It’s built from real 2026 installed pricing for Arkansas jobs, so it’s a solid planning range. It can’t account for access, existing framing conditions, or code requirements specific to your building, which is why the final number comes from a free on-site estimate.

For an attic roofline, use the sloped roof deck area, not the flat floor footprint — foam sprayed on the underside of the roof covers more surface area than the floor below it. For a crawl space, use the floor footprint. When in doubt, enter your best estimate; an on-site visit will get the exact number.

Closed-cell foam costs more per board foot to manufacture and apply, and it’s denser. It’s typically chosen for its vapor barrier and structural rigidity, not just R-value — that’s why it’s the default for crawl spaces and metal buildings in the calculator.

Only if you select “Yes” under removal. That adds $0.50–$1.00 per square foot for pulling out old fiberglass, blown-in insulation, or a failed vapor barrier before the foam goes in.

No. It’s a planning-stage estimate to help you budget before you call anyone. A quote is a written, on-site number tied to your building’s actual thickness, access, and scope — request one free using the button above.

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Free on-site estimates across Arkansas, with a written quote that spells out thickness, foam type, and everything included.

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