Alton's fast-growing neighborhoods in ZIP 78573 run long ductwork through hot attics, and those ducts leak cool air into spaces that hit 150 to 160 degrees under some of the strongest sun in Texas. Your summer electric bill tells the story.
McAllen Spray Foam Insulation has been sealing and insulating homes across the Rio Grande Valley since 2012. We know Alton's two-story brick and stucco ranches, the bonus rooms that never cool, and the crawl spaces under older frame homes that pull humid air through every gap. We're fully insured, local, and reachable when the work is done.
Spray Foam Insulation in Alton (78573)
Alton's building stock runs mostly 1990s to 2020s two-story brick and stucco homes with vented attics, bonus rooms over garages, and three-car garage bays. Your attic sits on a concrete slab foundation, and the air handler and ductwork run through it year-round. In summer, those ducts carry 150-degree air and lose cooling to every seam and penetration. In winter, Gulf humidity pushes moisture inward, and condensation collects on metal ductwork and the underside of roof decks. Closed walls in frame sections have no cavity insulation at all. Crawl spaces under some older homes and under additions pull damp air upward through rim joists and band joists that are wide open.
Spray foam seals all of it. Closed-cell foam stops vapor and adds strength. Open-cell foam breathes and costs less for a top-up. We've been doing attic foam, wall injection, rim joist sealing, crawl space work, and insulation removal and replacement across McAllen and Alton since 2012. We show up, we finish clean, and we're here to answer questions after the work is done.
Our services in Alton
- Attic Spray Foam Insulation in Alton · Open-cell foam on the roof deck turns a McAllen attic that hits 160°F under…
- Closed Cell Spray Foam Insulation in Alton · Two-pound closed-cell foam delivers R-6.5 per inch with its own vapor retarder…
- Open Cell Spray Foam Insulation in Alton · Half-pound open-cell foam air-seals attics and interior walls at a friendlier…
- Wall & Injection Foam Insulation in Alton · Injection foam fills closed walls through small drilled ports, no demolition.
- Crawl Space Spray Foam Insulation in Alton · Older pier-and-beam houses in Mission…
- Rim Joist & Band Joist Spray Foam in Alton · Bonus-room floors, cantilevers and band joists leak cooled air at every framing…
- Garage Spray Foam Insulation in Alton · Garage ceilings under bonus rooms and walls shared with the house are…
- Metal Building & Barndominium Spray Foam in Alton · Closed-cell foam is the insulation that stops a Rio Grande Valley metal…
- Commercial & New Construction Spray Foam in Alton · Warehouses; cold storage; offices…
- Insulation Removal in Alton · Old blown-in and batts vacuumed out before any new foam goes in, never buried.
- Insulation Replacement & Re-Insulation in Alton · The full reset: old material removed; gaps air-sealed…
- Air Sealing in Alton · Top plates; can lights; chases and attic hatches pull humid outside air into a…
How a Job Works in Alton
Step one is a free on-site assessment. We walk your attic, crawl space, or wall cavities, measure what's there, check for moisture, and talk through what makes sense for your home and your budget. We give you a written estimate with R-value and thickness specs so you know exactly what you're paying for and what code requires at your address.
Step two is the spray itself. Our crew sets up mechanical ventilation, masks off occupied rooms, and sprays to the thickness and density specified. Attic work usually takes a day. Wall injection or crawl space foam takes longer depending on access and area. We respect your home and your neighbors. The smell is real during cure, which is why ventilation runs and why we set a re-entry window of twenty-four to forty-eight hours before you move back in or turn the HVAC back on.
Step three is cleanup and a final walkthrough. We leave your property clean, haul scrap, and walk through with you so you see what we did and you know how to maintain it. Any questions after that, you call us at (956) 540-5716.
Attic spray foam in Alton typically runs from $1.50 per square foot for open-cell foam on top of existing insulation, up to $2 or more per square foot for closed-cell work or when old insulation has to come out first. A 1,500-square-foot attic might run $2,250 to $3,000 depending on thickness, cell type, and what's already there. Wall injection foam for a closed cavity runs around $2 per square foot. Rim joist and band joist sealing starts at $650 and depends on linear footage. Crawl space work starts at $2,500 because moisture control and substrate prep come first. Insulation removal and replacement starts at $2,800 because the old material has to come out safely before new foam goes in. The real cost drivers are the area to cover, the R-value and thickness your code requires, whether you choose open or closed cell, whether existing insulation is wet or fouled and has to be pulled, and how tight the space is to work in. We'll give you a firm written estimate after the on-site visit. Call us at (956) 540-5716 for a free assessment and a no-pressure quote.
✅ Written Estimates with R-Value & Thickness Specs, fully insured for work in Alton and nearby areas.
