Fast, Reliable Spray Foam Insulation Across Highlands
Spray foam insulation in Highlands, TX typically costs $2.75 to $6.50 per square foot installed, with most attic projects landing between $4,800 and $11,200. Our crews reach Highlands homes the same day or next morning, and you’ll have a written price before anyone touches a rafter. We know Wallisville Road, the riverside streets off North Main, and the newer builds off Thompson Road. Call (430) 226-1334 and a live person answers, not a recording.
Highlands sits right where the San Jacinto River meets the bayou country east of Houston. That means brutal attic heat in July, humidity that never quits, and salt air that chews through metal. We plan every Highlands spray foam job around those three realities. Our Spray Foam Insulation team works year-round here, not just when a big box store runs a seasonal promo.
Why Thistledown Insulation Houston Is Highlands’s Preferred Spray Foam Insulation Company
We’re a Cedarwell-family company, founded in 2003 and run by Neil Barron. That matters in Highlands because we’ve spent years crawling through the same attics you have: 1960s ranch homes with settled fiberglass, pier-and-beam houses where the floor breathes bayou air, manufactured homes that bake in the afternoon sun. Our techs know what they’ll find before the ladder goes up.
Every Highlands job gets the Cedarwell Care Promise. Shoe covers from the front door to the attic hatch. Drop cloths across your hallway. A photo of the cleanup before the van pulls away. If you’ve got a baby napping or a dog that loses its mind at strange noises, tell us. We use quiet tools and we ask before we move anything.
We answer the phone at (430) 226-1334 around the clock. Not a service. A person. When you call about spray foam in Highlands, you get a straight conversation, not a sales script.
Spray Foam Insulation Contractors in Highlands
Spray Foam Insulation Contractors in Highlands do more than spray foam. They read a house first. Older riverside neighborhoods have pier-and-beam foundations, and that changes everything about how foam should be applied. Our contractors start with a walkthrough, check the existing insulation, look for rodent damage, and map air leaks before recommending open-cell or closed-cell foam. Expect to pay $3,100 to $8,900 for a typical full-attic spray foam job in Highlands, depending on square footage and foam type.
Crawlspace and Floor Work
Highlands homes near the San Jacinto River often have moisture problems under the floorboards. Open-cell foam in a pier-and-beam crawlspace can absorb that bayou humidity and turn into a mold problem within two summers. We steer these homes toward closed-cell foam or rigid board, which resists moisture and adds structural strength to older joists.
Air Sealing Before Foam
Air sealing is the step that gets skipped by cheap bids. In Highlands, can lights, attic hatches, and plumbing penetrations leak conditioned air all day. We seal every penetration before spraying. That’s the difference between an attic that stays comfortable and one that just costs more to cool.
Spray Foam Attic Insulation in Highlands
Spray Foam Attic Insulation in Highlands has to handle attic temperatures that push past 140°F in August and humidity that never drops below 60 percent. Most Highlands attics originally got blown-in fiberglass, often settled to R-11 or less. We remove or correct it, then spray foam at the roofline or the attic floor depending on how the house breathes. Typical attic spray foam for a Highlands ranch-style home runs $4,800 to $11,200, with the exact number in writing before we start.
Conditioned Attic Conversions
Many Highlands homeowners don’t realize their attic can become conditioned space. Spray foam under the roofline turns a 140°F oven into a room you could store holiday decorations in without them melting. For older homes with ductwork running through the attic, this also cuts cooling loss dramatically, since your ducts stop sitting in superheated air.
Garage Ceiling and Rim Joist Work
Garage ceilings over a cooled room and rim joists along the foundation are two of the biggest leak points in Highlands homes. We spray closed-cell foam into these gaps to stop air movement and keep humidity out. Rim joist spray foam in a typical Highlands home runs $2,200 to $4,600, and it fixes the cold-floor problem you feel in January.
We recently tackled a 1960s ranch-style home on Wallisville Road where the original blown-in fiberglass in the attic had settled to barely R-11 and the can lights were leaking air. Our crew air-sealed every penetration and sprayed a full 6 inches of closed-cell foam under the roofline, turning a 140°F attic into a conditioned space that knocked the homeowner’s summer electric bill down by a third. That’s what the work looks like when it’s done right.
Trusted Brands We Service in Highlands
We install Icynene, Demilec, and CertainTeed spray foam products in Highlands, and we keep parts and material on hand for fast turnaround. Icynene’s closed-cell foam handles the humid bayou air and salty breeze along the San Jacinto better than most open-cell formulas. Demilec gives us a strong open-cell option for interior walls where moisture isn’t a threat. CertainTeed rounds out the lineup for attic floors and garage ceilings. Because we’re not tied to one manufacturer, we match the foam to your house, not the other way around. Highlands customers get the right product for their specific attic, crawlspace, or roofline.
Common Spray Foam Insulation Problems We See in Highlands Homes
- Rodent-damaged batt insulation under pier-and-beam homes. Rivers and bayous mean rats and mice. They tear through fiberglass batts, which then slump and lose all R-value. Foam applied over that mess traps the damage, the droppings, and the odor. We pull the old material first, then spray.
- Salt air corroding metal lath and fasteners. Homes within a mile of the San Jacinto River get salt spray that eats galvanized metal faster than you’d think. Foam supported by corroded lath sags and delaminates. We spec stainless fasteners and proper substrate prep for riverside homes.
- Open-cell foam in humid crawlspaces turning into mold mats. Bayou humidity doesn’t take a season off. Open-cell foam absorbs it, holds it, and within two summers you’ve got a mold problem under the house. Closed-cell is the fix in Highlands, no exceptions near the water.
- Foam applied over old blown-in fiberglass without removal. Some crews spray right over settled fiberglass and call it done. That traps heat, moisture, and rodent debris underneath. We remove or correct the old insulation before foam goes down. You should get to see photos of the attic before and after.
Pricing for Spray Foam Insulation in Highlands, TX
Here’s what Highlands homeowners should expect to pay for spray foam work in 2025. Open-cell attic spray foam runs $2.75 to $4.25 per square foot. Closed-cell runs $4.50 to $6.50 per square foot. A typical 1,500-square-foot attic in a Highlands ranch home lands between $4,800 and $9,800 for open-cell, and $7,500 to $11,200 for closed-cell. Rim joist work usually runs $2,200 to $4,600. Garage ceiling spray foam runs $1,800 to $3,900 depending on size. Crawlspace encapsulation with closed-cell foam starts around $4,200 and goes up from there based on access and square footage. These are real ranges for Highlands, TX, not national estimates. Every customer gets a written price before any work starts. Call (430) 226-1334 for your exact number. The estimate is free, and it’s a real number, not a range you have to guess at.
We Also Serve Cities Near Highlands
Our crews cover Highlands and the surrounding communities along the San Jacinto River and Galveston Bay corridor. We run jobs in Channelview, Baytown, Pasadena, and Houston every week. If you’re in one of those areas, call (430) 226-1334 and we’ll schedule the same kind of written-price, shoe-covers-and-drop-cloths visit we bring to every Highlands home. No matter which side of the river you’re on, the Cedarwell Care Promise still applies.
Serving Highlands, TX - Our Local Coverage Area
We’re based in the Highlands area and know this community well. Use the map below to see our service coverage - if you’re nearby, we can almost certainly help.
FAQs About Spray Foam Insulation in Highlands
Highlands pier-and-beam homes sit close to the San Jacinto River and bayou country, where ground moisture rises through the crawlspace and humidity stays high year-round. Closed-cell spray foam is the standard choice here because it doesn’t absorb that moisture, while open-cell acts like a sponge and can start harboring mold within two humid seasons. Call (430) 226-1334 and we’ll assess your crawlspace and tell you honestly which foam fits.
Spray foam is not a rodent repellent, but it does remove the habitat. Rats and mice shred fiberglass batts because they’re soft and easy to burrow through. Closed-cell spray foam hardens into a dense, rigid layer that rodents don’t nest in. If you’re on the river side of Highlands, we recommend pulling out any damaged batt insulation and spraying closed-cell foam in its place.
Closed-cell spray foam handles Highlands’s salty, humid air better than open-cell or fiberglass because it forms a continuous vapor and air barrier. The real vulnerability is the metal lath and fasteners used to support the foam. We spec stainless or coated fasteners on riverside Highlands homes, because standard galvanized hardware corrodes fast and causes foam to sag or delaminate.
No. Spray foam applied under the roofline keeps solar heat from entering the attic in the first place, dropping attic temperatures dramatically. On a 140°F day in Highlands, a properly sprayed attic stays within a few degrees of the house temperature. That also protects ductwork and any stored belongings from the extreme heat that bakes traditional vented attics here.
Yes. Removing old, rodent-damaged batt insulation is non-negotiable in Highlands crawlspaces. If foam is sprayed over it, the old material traps moisture, droppings, and odors, and your air quality suffers. Our crews remove the damaged insulation, sanitize the crawlspace, air-seal, and then apply closed-cell foam. You’ll see before and after photos before the van leaves your driveway.
Ready to get your Highlands home sealed up right? Call (430) 226-1334 for a free, written estimate. Neil Barron and the Thistledown Insulation Houston team will walk you through your options, give you a hard number, and schedule a time that works for your family. No pressure, no vague ranges, no surprises. Just clean, careful work from a crew that treats your house like its own.
Written by Neil Barron, Owner at Thistledown Insulation Houston, serving Highlands and the surrounding San Jacinto River communities since 2003.