GreenFiber Spray Foam Insulation in Boerne: What to Know First
We provide independent GreenFiber spray foam insulation service in Boerne, with most jobs scheduled within 24 to 48 hours and completed same-day once our crew is on site. A written price lands before any work starts, and every job closes with a documented photo record plus before-and-after blower-door numbers when air sealing is part of the scope. This page is for Boerne homeowners who need open-cell, closed-cell, rim joist, garage ceiling, or roof deck spray foam and want to know what GreenFiber-specific issues to watch for, what the work actually costs, and what documentation you’ll walk away with. Call (830) 529-7780 for a free estimate.
How GreenFiber Products Fail - and How We Fix Them
- GreenFiber All Borate Cellulose settling in wall cavities below intended R-value. The loose-fill product settles 20-25% over time in Boerne’s humidity cycles, creating thermal gaps at the top plate. We remove settled material with commercial extraction equipment, then dense-pack with GreenFiber stabilized cellulose or transition to open-cell spray foam for a monolithic seal that won’t settle.
- GreenFiber Sanctuary blown-in fiberglass bridging over irregular framing. In the older ranch homes near the Cibolo Nature Center, we’ve seen this product bridge across recessed light housings and HVAC chases, leaving voids where conditioned air escapes into the attic. We pull the bridging material, seal penetrations with fire-rated caulk and rigid foam, then reinstall with proper density or switch to closed-cell spray foam for hard-to-cavity areas.
- GreenFiber stabilized cellulose moisture absorption in vented crawl spaces. The borate treatment resists mold but doesn’t prevent moisture wicking in Boerne’s spring humidity spikes. We find this in rim joist applications where ground vapor exceeds 70% RH. Our fix: remove affected material, install a polyethylene vapor barrier with sealed seams, then apply closed-cell spray foam to the rim joist for a Class II vapor retarder that cellulose alone cannot provide.
- GreenFiber spray foam shrinkage in garage ceiling applications. Open-cell foam applied too thick in a single pass can pull away from framing members during cure, a problem we’ve tracked in three Boerne homes built 2019-2021. We cut away shrunken material back to sound substrate, reapply in controlled lifts per manufacturer pass thickness, and verify adhesion with a pull test before the crew leaves.
- GreenFiber product incompatibility with existing Reflectix radiant barriers. When homeowners layer GreenFiber over Reflectix stapled to rafters, condensation forms at the foil-cellulose interface in Boerne’s temperature swings. We document the assembly with photos, remove the Reflectix if it’s trapping moisture, and redesign the stack-up - often moving to spray foam on the roof deck with the radiant barrier eliminated or relocated per ACCA guidance.
Our GreenFiber Spray Foam Insulation Process

- 1
Call intake with a live person. Calls to (830) 529-7780 are answered 24/7. We schedule a site visit, confirm the GreenFiber product line in place, and email a 30-minute arrival window.
- 2
On-site diagnostic and blower-door baseline. Wes Okafor or a named technician runs a pressurization test - a single number showing how much air the envelope is losing. We photograph existing conditions, identify thermal bypasses, and check for moisture intrusion.
- 3
Written scope and price before any work starts. Under Haven Standard Clause 1: flat price, written scope, written warranty. No exceptions. If you have a competing estimate, we provide a free second opinion and read it with you.
- 4
Air sealing first, then insulation. Top plates, can lights, plumbing and electrical penetrations, and duct chases get sealed with fire-rated caulk, rigid foam, or closed-cell spray foam as appropriate. Seal the envelope first. Then fill it.
- 5
GreenFiber or alternate material installation with pass-thickness control. We source from GreenFiber, Owens Corning, Johns Manville, Knauf, Rockwool, CertainTeed, Icynene, and Demilec - no proprietary lock-in. Open-cell spray foam goes on in lifts; closed-cell in controlled passes. Every installation is documented with time-stamped photos.
- 6
Final blower-door test and documented handoff. We run the pressurization test again, print the pressure-differential report in pascals, and walk you through the numbers at your kitchen table. The 365-Day Done Right Promise applies from that moment.
What GreenFiber Spray Foam Insulation Costs in Boerne
Most GreenFiber spray foam insulation jobs in Boerne homes fall in these ranges:
| Application | Typical Range | What Moves the Price |
|---|---|---|
| Rim joist, closed-cell (avg. 1,800 sq ft home) | $1,800 - $3,200 | Access conditions, existing moisture damage, need for vapor barrier |
| Garage ceiling, open-cell | $2,400 - $4,500 | Framing irregularities, need to remove failed prior foam |
| Attic roof deck, open-cell | $4,500 - $8,500 | Square footage, pitch complexity, HVAC relocation needs |
| Wall cavity dense-pack or retrofit | $2,800 - $5,500 | Interior vs. exterior access, plaster vs. drywall |
These are real numbers for the Boerne market, not teaser rates. The written price you receive before work starts is the price you pay. Call (830) 529-7780 for an exact quote - estimates are free.
Why Boerne Homeowners Call Topside Attic Insulation Boerne for GreenFiber Work

We’ve sealed and insulated 9,000+ homes since 2016, and the ones in Boerne keep us honest about humidity, hill-country temperature swings, and the stack-effect air leakage that hits older construction near the Cibolo Nature Center hardest. Our technicians are background-checked, uniformed, and trained on GreenFiber’s specific product behaviors - not generic “spray foam” knowledge. The before-and-after blower-door report is printed and handed over, not emailed later or forgotten. If we don’t get the pressure differential we promised, we come back under the 365-Day Done Right Promise. We also service Reflectix and every major insulation brand, so if your assembly needs a mixed-material solution, we’re not locked into a single manufacturer’s catalog. Independent, documented, and written down before we start.
FAQs
GreenFiber’s product warranty covers manufacturing defects regardless of who installs, but installation-specific coverage requires following published application specs. As an independent GreenFiber service provider, we document every installation with photos and pass-thickness logs so warranty claims have supporting evidence if needed. Call (830) 529-7780 and we’ll review what’s in writing.
GreenFiber cellulose is gray from recycled content; their stabilized products have a uniform density that loose-fill doesn’t replicate after disturbance. We stock current GreenFiber material for repairs, but if the existing product has aged or settled, the match won’t be invisible. We photograph before and after so you see exactly what the transition looks like. For aesthetic-critical areas, we often recommend transitioning the entire cavity to spray foam.
Repair is cheaper when the material is dry, accessible, and the failure is isolated - typically $400 to $900. Replacement with spray foam makes sense when there’s moisture damage, multiple settled cavities, or you’re chasing a specific blower-door number. We give you both numbers in writing and let the math decide. Call (830) 529-7780 for a free second opinion on any estimate you already have.
Most GreenFiber spray foam jobs in Boerne are scheduled within 24 to 48 hours, with same-day completion once we’re on site. Emergency situations - active moisture intrusion or exposed foam off-gassing - get prioritized. A live person answers (830) 529-7780 to confirm availability.
We source GreenFiber material direct for cellulose and stabilized products. For spray foam applications, we use GreenFiber where specified and quality equivalents from Icynene or Demilec where the assembly demands it - always disclosed in the written scope before work starts. No proprietary lock-in means we choose the material that hits the number, not the brand that fills a quota.
Written by Wes Okafor, Owner, Topside Attic Insulation Boerne at Topside Attic Insulation Boerne, serving Boerne and nearby areas.