Pricing ranges for spray foam in North Texas, what drives the cost up or down, and how to know if a quote is fair.
Most Frisco homeowners pay between $2,500 and $6,000 for a full attic spray foam job, depending on attic size and foam type. Blown-in insulation runs $800 to $1,800 for a standard attic top-off. Both figures assume no existing insulation removal is needed -- add $500 to $1,500 if removal is required.
Spray foam insulation is priced per board foot -- that's one square foot at one inch of depth. The type of foam, the thickness required, and the size and accessibility of the space all affect the final number. Here's what to expect in the Frisco market in 2026.
Typical Pricing Ranges
Open-cell spray foam: $0.45-$0.75 per board foot. Closed-cell spray foam: $1.00-$1.75 per board foot. For a typical 2,000 sq ft Frisco home attic insulated with closed-cell to 2 inches, you're looking at roughly $3,000-$6,000 depending on access and current insulation conditions.
Open-Cell vs Closed-Cell: Which Costs More and Why
| Open-Cell Foam | Closed-Cell Foam | |
|---|---|---|
| Cost per board foot | $0.44 to $0.65 | $1.00 to $1.50 |
| R-value per inch | R-3.5 to R-3.8 | R-6.0 to R-7.0 |
| Best use | Attic floor, interior walls, sound dampening | Roof deck, crawl spaces, exterior walls, moisture barriers |
| Vapor barrier | No | Yes |
| Typical Frisco attic cost | $1,800 to $3,500 | $3,500 to $6,000 |
| Lifespan | 20+ years | 20+ years |
Most Frisco attics use closed-cell foam applied to the roof deck, which creates a conditioned attic space and keeps temperatures 40 to 60 degrees cooler than an unsealed attic.
What Pushes the Price Up
The U.S. Department of Energy recommends R-38 to R-60 for attics in North Texas, which falls in climate zone 3. Most Frisco homes built before 2015 shipped with R-19 to R-22 -- roughly half the recommended level.
Difficult access (low-pitch roofs, cramped attic spaces), the need to remove existing insulation before spraying, and higher target R-values that require more thickness all add to the cost. A quote that doesn't account for any of these is not a real quote.
When Removal Is Required First
Not every attic can go straight to new insulation. If the existing material is contaminated -- rodent droppings, mold, water damage, or vermiculite -- it has to come out before anything new goes in. Skipping this step traps the problem under new foam and creates a bigger issue later.
Removal typically runs $1,000 to $2,500 for a standard residential attic, depending on the amount of material and how contaminated it is. Heavily contaminated attics require additional containment and disposal procedures that push the number higher. The removal cost is separate from the new insulation cost -- a contractor should quote both together so you have a complete picture before committing.
Signs that removal is likely: attic smells musty or of ammonia, you can see staining or visible mold on the existing material, there is evidence of rodent activity (droppings, nesting), or the insulation has been wet and dried multiple times. If any of these apply, mention it when scheduling the assessment -- it affects the scope and the quote.
What You're Paying For
Spray foam is not the cheapest insulation option upfront. It's the most effective one. Most Frisco homeowners see 20-30% lower summer electric bills after a spray foam attic job. On a $300/month summer Oncor bill, that's $60-$90 per month -- $720-$1,080 per year. The math works in 4-6 years, and the foam lasts 20-30 years.
How to Read a Quote
A real quote should include the foam type, the target thickness, the total square footage, and any prep work. If a contractor is quoting you a single number without those details, ask for a breakdown. Itemized written quotes come after every assessment.
Costs vary most by attic size and existing insulation condition. See what our attic insulation service includes before requesting a quote.
