Fast, Reliable Spray Foam Insulation Across Lakehills
Spray foam insulation in Lakehills, TX typically runs $2,800-$7,500 for most residential jobs, with same-week scheduling available and crews dispatched from our San Antonio office. We’re familiar with the specific challenge these Medina Lake shoreline homes present: thousands of 1960s-1980s weekend cabins converted to year-round living, most built with minimal or zero insulation before Bandera County’s building codes caught up. Our Spray Foam Insulation team treats every Lakehills job as a custom envelope solution, starting with a written price and a blower-door assessment of what you’re actually losing. Call (830) 529-7780 for a free estimate with flat pricing before any work starts.
Why Topside Attic Insulation Boerne Is Lakehills’s Preferred Spray Foam Insulation Company
We’ve sealed and insulated more than 9,000 homes since 2016, and the Lakehills jobs stick with us. The converted cabin on the Medina Lake shoreline near Lakehills where our tech found bare studs behind 1974 wood paneling and a pier-and-beam crawl space letting humidity rise into the living area. We sealed those rim joists with closed-cell spray foam, applied open-cell to the attic roof deck, and the homeowners finally held temperature through a July heat wave and a February freeze without wall sweating.
That job is why we publish before-and-after blower-door numbers on every applicable Lakehills project. The pressurization reading shows, in one figure, how much conditioned air your building envelope was losing before we started and what the crew achieved after sealing and insulating. You get the numbers in writing, along with a Documented Photo Record, before anyone leaves.
Our 365-Day Done Right Promise applies to all Lakehills work. If it’s not done right, we make it right. And a live person answers calls 24/7, no voicemail loops, no callback windows measured in business days.
We also offer a Free Second Opinion on any written estimate from another contractor. Bring us a competing quote for spray foam in Lakehills and we’ll read it with you, line by line.
Our Spray Foam Insulation Services in Lakehills
Open-Cell Spray Foam in Lakehills
Open-cell spray foam works well for Lakehills attic roof decks and interior wall cavities where you need both insulation and some vapor permeability. In the legacy cabins near Medina Lake, we often use open-cell on roof decks after we’ve sealed the air leaks at top plates and can lights, because it expands to fill irregular framing common in unpermitted 1970s additions. A typical open-cell job in Lakehills runs $2.80-$3.40 per board foot installed.
Closed-Cell Spray Foam in Lakehills
Closed-cell spray foam is our first choice for Lakehills rim joists, crawl space walls, and any exterior application where Medina Lake humidity is a factor. At roughly 2 inches it acts as its own vapor barrier, which matters in Bandera County’s pier-and-beam cabins where ground moisture rises year-round. We also use closed-cell on garage ceilings and unconditioned bonus rooms above carports. Closed-cell in Lakehills typically costs $4.50-$5.80 per board foot.
Rim Joist Spray Foam in Lakehills
Rim joist sealing is where we start on most Lakehills cabin retrofits. The perimeter of your floor system, where the joists sit on the pier-and-beam foundation, is often wide open to outside air and humidity. In unincorporated Bandera County, many of these cabins were built with no rim joist insulation at all. We seal the entire perimeter with closed-cell spray foam, typically 2-3 inches, before addressing walls or attic. Most Lakehills rim joist jobs run $1,800-$3,200.
Garage Ceiling Spray Foam in Lakehills
Garage ceiling spray foam in Lakehills addresses a common conversion scenario: the original weekend cabin had an open carport, later enclosed into a garage, with a bedroom or living space above it. These uninsulated garage ceilings bleed heat downward in summer and pull it upward in winter. We spray closed-cell foam to the garage ceiling deck, creating a thermal boundary that actually works for the room above. Typical Lakehills garage ceiling jobs: $2,200-$4,500.
Spray Foam Roof Deck
Spray foam applied directly to the underside of your roof deck converts a vented Lakehills attic into conditioned space, which is often the only practical approach in cabins with HVAC ductwork running through a 120°F attic. We see this constantly in Medina Lake homes where the original window-unit cabin got central air added later, with ducts laid in the attic because there was nowhere else to put them. Foam the roof deck, seal the leaks, and the ducts stop fighting the temperature they live in.
What happens when you call
- 1
A real person answersNo phone trees - you reach a local pro.
- 2
You get an upfront price rangeHonest numbers before anyone is dispatched.
- 3
A background-checked tech heads outLicensed & insured, dispatched right away.
- 4
You approve before work beginsNothing starts until you say go.
Trusted Brands We Service in Lakehills
We source spray foam materials from Demilec, Owens Corning, Johns Manville, and other established manufacturers, with no proprietary product lock-in. For Lakehills jobs, we stock closed-cell and open-cell formulations matched to Bandera County’s humidity and temperature swings, not whatever happens to be moving fastest through the warehouse. Our crews carry the full chemical suite for same-day adjustment if we open a wall and find conditions that change the vapor profile. You get the product that fits your specific cabin, not a one-size-fits-all specification.
Common Spray Foam Insulation Problems We See in Lakehills Homes
- Spray foam applied over unsealed pier-and-beam crawl spaces. Medina Lake humidity rises through open crawl spaces and gets trapped between new foam and original 1970s paneling, causing moisture damage that shows up as stained walls or buckled flooring months later. We seal the crawl space perimeter and vapor barrier before touching walls.
- Open-cell foam in vented attics without vapor analysis. Bandera County’s hard winter freezes, like the ones that hit Lakehills during Winter Storm Uri in 2021, can drive condensation onto roof decks if the foam’s vapor permeability isn’t matched to the assembly. We calculate dew point and specify accordingly.
- Foam sprayed over unpermitted cabin additions with irregular framing. Lakehills has decades of owner-built expansions with no inspection, meaning gaps, uneven studs, and sheathing not rated for full-time thermal loads. We map the framing with thermal imaging before quoting, because adhesion failures at original-to-addition junctions are common.
- Insulation contractors who skip air sealing entirely. Blowing foam over an unsealed attic floor or wall cavity is like putting a sweater on someone standing in a wind tunnel. Our Haven Standard requires sealing top plates, can lights, plumbing penetrations, and electrical boxes before any insulation goes in.
Pricing for Spray Foam Insulation in Lakehills, TX
Here’s what spray foam insulation costs in the Lakehills market, based on jobs we’ve completed in Bandera County:
| Service | Typical Range |
|---|---|
| Rim joist sealing (closed-cell) | $1,800 - $3,200 |
| Attic roof deck, open-cell | $2,800 - $5,500 |
| Attic roof deck, closed-cell | $4,200 - $7,500 |
| Garage ceiling, closed-cell | $2,200 - $4,500 |
| Whole-cabin envelope (typical 1,200 sq ft) | $5,500 - $11,000 |
What moves you within these ranges: the condition of existing framing, whether we find bare studs or failed batt insulation, accessibility of the work areas, and whether the crawl space needs vapor barrier work before we foam. Every Lakehills job starts with a written price, flat and complete, before anyone lifts a tool. That’s Haven Standard Clause 1. Call (830) 529-7780 for your specific quote, estimates are free.
We Also Serve Cities Near Lakehills
Our crews work throughout the Hill Country from the same dispatch base that serves Lakehills, including Boerne, Fair Oaks Ranch, Scenic Oaks, and Helotes. Each community gets the same written-price-first protocol and documented blower-door verification where applicable.
Serving Lakehills, TX - Our Local Coverage Area
We’re based in the Lakehills 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 - Spray Foam Insulation in Lakehills
Yes, spray foam is often the only practical way to make these thin-walled cabins comfortable for full-time Hill Country living. The original construction assumed occasional weekend use with minimal heating or cooling, so bare studs or thin batts were sufficient. For year-round occupancy with real thermal loads, we typically seal rim joists with closed-cell foam and condition the attic or walls with open-cell or closed-cell depending on the assembly. Call (830) 529-7780 and we’ll assess your specific cabin, estimates are free.
Yes, when the spray foam system is specified correctly and installed after proper air sealing. Closed-cell spray foam at 2+ inches acts as its own vapor barrier, which is why we use it on Lakehills rim joists and crawl space walls. Open-cell requires a separate vapor retarder in certain assemblies. The critical step most contractors skip is sealing the pier-and-beam perimeter first, before foam goes on walls or roof deck. We don’t skip it.
Bare studs between interior paneling and exterior siding, with no insulation and no vapor control, because Bandera County was unincorporated when most of these cabins were built and no permit required insulation. Sometimes we find failed fiberglass batts stuffed in later by an owner, compressed and moisture-stained. Occasionally there’s spray foam from a previous contractor who didn’t seal the crawl space first, trapping humidity against the paneling. We photograph everything and show you before we quote.
Closed-cell for rim joists, crawl spaces, and any exterior-facing surface where Medina Lake humidity is a direct factor. Open-cell for interior wall cavities and roof decks where you want expansion into irregular framing and some vapor permeability is acceptable. Many Lakehills cabins get both: closed-cell at the foundation perimeter, open-cell at the roof. Your written scope will specify which goes where and why, before work starts.
Yes, especially for seasonal residents. Spray foam’s air-sealing quality means the interior temperature holds longer during vacancy, reducing HVAC runtime when you return and protecting plumbing from freeze risk during Bandera County’s occasional hard winters. The blower-door number we provide after sealing shows exactly how much less air exchanges while you’re away. For Lakehills owners who lock up in August and return in January, that documented performance change matters.
Written by Wes Okafor, Owner at Topside Attic Insulation Boerne, serving Lakehills since 2016 under The Haven Standard.