Los Fresnos sits north of Brownsville on larger lots with shops and barns, and homes here run straight into the brutal Rio Grande Valley heat. Your attic carries ductwork that runs 150 to 160 degrees for most of the year under some of the hottest sun in Texas, and that attic is vented, which means every bit of that heat loss costs you money and every humid Gulf breeze pushes moisture inward.
McAllen Spray Foam Insulation has been serving Los Fresnos and the surrounding McAllen area since 2012. We know the houses here: concrete slabs, vented attics over one-story and two-story brick and stucco frames, metal buildings and barndominiums on larger properties, and closed walls that were never insulated when they were built. We spray foam attics, walls, crawl spaces, rim joists, garages and metal buildings, and we remove and replace insulation that has failed or gotten wet. We show up with fully insured crews, write estimates with R-value and thickness specs, and we stay reachable after the work is done.
Spray Foam Insulation in Los Fresnos (78566)
Los Fresnos homes sit on concrete slabs with vented attics running the air handler and ductwork overhead. In summer, that attic is a furnace. The ductwork leaks, the insulation settles or compresses, and the hot air finds its way into the living space below. In the humid season, moisture condenses on the underside of the roof decking and on ducts, and it drips. Closed cell spray foam seals the attic to the roof deck, stops the air leaks, and carries an R-value of 6 to 7 per inch. Open cell foam costs less, runs R-3.5 to 4 per inch, and is breathable, so it does not trap moisture in the wall cavity if the wall is vented correctly. Both are faster and more thorough than blown-in insulation, and both are the right tool for wall cavities that were left empty when the house was framed.
Larger properties in and around Los Fresnos often have metal buildings, barndominiums, or agricultural structures. Metal conducts heat and cold, and condensation forms on the underside when warm humid air inside meets the cool metal skin. Spray foam on the underside of the metal roof or wall panels stops that condensation and insulates the space. We have insured crews trained for metal building spray foam and for the tight attic access that older homes demand.
Our services in Los Fresnos
- Attic Spray Foam Insulation in Los Fresnos · Open-cell foam on the roof deck turns a McAllen attic that hits 160°F under…
- Closed Cell Spray Foam Insulation in Los Fresnos · Two-pound closed-cell foam delivers R-6.5 per inch with its own vapor retarder…
- Open Cell Spray Foam Insulation in Los Fresnos · Half-pound open-cell foam air-seals attics and interior walls at a friendlier…
- Wall & Injection Foam Insulation in Los Fresnos · Injection foam fills closed walls through small drilled ports, no demolition.
- Crawl Space Spray Foam Insulation in Los Fresnos · Older pier-and-beam houses in Mission…
- Rim Joist & Band Joist Spray Foam in Los Fresnos · Bonus-room floors, cantilevers and band joists leak cooled air at every framing…
- Garage Spray Foam Insulation in Los Fresnos · Garage ceilings under bonus rooms and walls shared with the house are…
- Metal Building & Barndominium Spray Foam in Los Fresnos · Closed-cell foam is the insulation that stops a Rio Grande Valley metal…
- Commercial & New Construction Spray Foam in Los Fresnos · Warehouses; cold storage; offices…
- Insulation Removal in Los Fresnos · Old blown-in and batts vacuumed out before any new foam goes in, never buried.
- Insulation Replacement & Re-Insulation in Los Fresnos · The full reset: old material removed; gaps air-sealed…
- Air Sealing in Los Fresnos · Top plates; can lights; chases and attic hatches pull humid outside air into a…
How a Job Works in Los Fresnos
We start with a free on-site visit. We look at the attic, the walls, the crawl space or the metal building, measure the area, note what insulation is already there, check for moisture or damage, and ask about your comfort problem. We talk about open cell versus closed cell, R-value, and cost. We answer your questions. No pressure, no estimate in the driveway.
We send you a written estimate with the R-value, the thickness per pass, the board footage, the cost, and the timeline. If you say go, we schedule the work around your schedule and any other trades already on the job. We set up mechanical ventilation in the space we are spraying so the foam cures in fresh air. We spray the foam in controlled passes to the thickness we quoted. During cure, we keep the space ventilated. We tell you the re-entry window: typically twenty-four to forty-eight hours before the space can be occupied or covered with drywall. If insulation has to come out first because it is wet, compressed, or fouled, we remove it and haul it away before the foam goes in. We do not spray over a wet substrate or a leaking roof. We fix the moisture first or we walk away.
When the foam has cured, we do a final walkthrough with you, answer any last questions, and leave the property clean.
Attic spray foam in Los Fresnos typically runs from $1.50 per square foot for open cell to $1.20 per board foot for closed cell, depending on the thickness and R-value you need. A 1,500-square-foot attic with existing blown-in insulation that needs topping up might run $2,000 to $3,500. A full removal and replacement of a damp attic runs higher because insulation has to come out first. Wall injection foam for a closed cavity runs from $2 per square foot. Crawl space spray foam starts at $2,500 and goes up with the area and the depth of the space. Rim and band joists run from $650. A metal building or barndominium depends on the square footage and whether you are foaming the roof deck, the walls, or both. Insulation removal alone runs from $950. The biggest cost factors are the area to cover, the R-value and thickness you specify, whether you choose open or closed cell, and what existing insulation has to come out first. Call us at (956) 540-5716 for a free estimate and a firm price on your job.
✅ Written Estimates with R-Value & Thickness Specs, fully insured for work in Los Fresnos and nearby areas.
