Prosper's new construction and spec-built homes come with sealed attics and multiple air handlers from the first drawing, and that design puts every cooling dollar and every moisture problem right where spray foam insulation solves it best. Mckinney Spray Foam Insulation has been serving Prosper (75078) and the surrounding McKinney area since 2012, and we know exactly what those two-story brick homes with vaulted ceilings and west-facing walls need to stay comfortable and dry.
Prosper homeowners call us because summer electricity bills have climbed past what they expected, because a bonus room over the garage or an upstairs bedroom won't cool down, or because they've found damp insulation in a crawl space or condensation dripping off metal building ductwork. We show up with a truck, a crew, and the honesty to tell you whether foam is the answer or whether something else should come first.
Spray Foam Insulation in Prosper (75078)
Prosper's building stock is almost entirely 2000s-2020s two-story brick construction with steep composition-shingle roofs, cast-stone trim, vaulted ceilings, and bonus rooms over attached three-car garages. Every one of those homes has an air handler and ductwork routed through a sealed attic that hits 140 degrees by mid-afternoon in July and August. The black expansive clay beneath the slab swells and shrinks with the season, and spring humidity and occasional winter ice storms test every roof and every air seal. New construction spec lists call for sealed attic spray foam because it works: it stops the temperature swing that makes AC run all day, it stops the moisture that collects on cold ductwork in spring and fall, and it seals the rim joists and band joists where air leaks and condensation start.
Our team has been spraying attics, crawl spaces, rim joists, and metal building shells in Prosper and the McKinney area for over a decade. We know the neighborhoods, the building officials, the access challenges in tight attics, and exactly what thickness and R-value the energy code requires at your address.
Our services in Prosper
- Attic Spray Foam Insulation in Prosper · Open-cell foam on the roof deck turns a 150°F McKinney attic into conditioned…
- Closed Cell Spray Foam Insulation in Prosper · Two-pound closed-cell foam delivers R-6.5 per inch with its own vapor retarder…
- Open Cell Spray Foam Insulation in Prosper · Half-pound open-cell foam air-seals attics and walls at a friendlier price per…
- Wall & Injection Foam Insulation in Prosper · Injection foam fills closed walls through small drilled ports, no demolition.
- Crawl Space Spray Foam Insulation in Prosper · Closed-cell foam on pier-and-beam subfloors stops cold floors in a freeze and…
- Rim Joist & Band Joist Spray Foam in Prosper · Band joists; cantilevers and bonus-room floors over garages leak conditioned…
- Garage Spray Foam Insulation in Prosper · Garage ceilings under bonus rooms and walls shared with the house are…
- Metal Building & Barndominium Spray Foam in Prosper · Closed-cell foam is the insulation that stops a Texas metal building from…
- Commercial & New Construction Spray Foam in Prosper · Warehouses; offices; churches and production builders served on schedule.
- Insulation Removal in Prosper · Old blown-in and batts vacuumed out before any new foam goes in, never buried.
- Insulation Replacement & Re-Insulation in Prosper · The full reset: old material removed; gaps air-sealed…
- Air Sealing in Prosper · Top plates; can lights; chases and attic hatches leak more cooled air than most…
How a Job Works in Prosper
We start with a free on-site assessment. We look at the space to be sprayed, the substrate and any existing insulation, the access routes, and any moisture or contamination that has to be addressed before foam goes down. We take measurements, ask about your comfort complaints and your energy goals, and we give you a written estimate with the R-value and thickness specs that apply to your home and your local code.
On the day of the work, our fully insured crew arrives with the spray rig, sets up mechanical ventilation to run during the cure, and sprays the foam to the exact thickness called for in your estimate. We work in occupied homes all the time, and we always tell you the re-entry window: typically twenty-four to forty-eight hours before the space is safe to use again. If your attic has old, damp, or rodent-fouled insulation, we remove it first and haul it away, and we never spray over a wet substrate or a leaking roof.
When we're done, we clean up the site, walk you through the finished work, and leave your property the way we found it except for the new insulation. You'll see the difference in your electric bill and in the temperature upstairs by the end of the first summer.
Attic spray foam in Prosper typically runs from $1.50 per square foot for open cell foam to $1.20 per board foot for closed cell, depending on the thickness and R-value your code requires and whether you're topping up existing insulation or starting from scratch. A sealed attic retrofit on a typical Prosper two-story home often runs $3,500 to $7,000. Wall injection foam for closed cavities runs from $2 per square foot. Crawl space foam starts at $2,500. Rim joist and band joist sealing starts at $650. If you have compressed, damp, or contaminated insulation that has to come out first, removal starts at $950, and the final cost depends on the square footage and what you're replacing it with. The biggest cost factors are the area to cover, the R-value and thickness specified by your local code, whether you're using open or closed cell foam, and whether existing insulation has to be removed first. Call us at (469) 247-0288 for a free estimate. We'll measure your space, specify the foam type and thickness you need, and give you a firm price before any work starts.
✅ Written Estimates with R-Value & Thickness Specs, fully insured for work in Prosper and nearby areas.
