Rockwool Spray Foam Insulation in Schertz: What to Know First
We provide independent Rockwool spray foam insulation in Schertz, typically completing jobs same-day or next-day depending on attic access and the condition of existing top-plate sealing. Most Rockwool-to-spray-foam conversions in Schertz run between $2,800 and $5,400 for a standard single-family attic, with a written price delivered before any work starts. This page is for Rockwool owners in Schertz who need spray foam insulation, whether you’re replacing failed Comfortbatt in a 2018 build near FM 3009 or upgrading AFB evo in a Sedona subdivision home where summer attic temperatures crack 140°F and the existing mineral wool is doing nothing about air movement. Call (830) 402-5240 for a free estimate with a written scope.
How Rockwool Products Fail - and How We Fix Them
- Comfortbatt settling in vented attics. The semi-rigid batts compress where they meet irregular framing in Schertz’s older Garden Ridge-adjacent homes, creating thermal bypass channels. We remove the settled batts, air-seal the top plates and electrical penetrations with closed-cell foam, then install open-cell spray foam at the roof deck for a continuous thermal boundary.
- AFB evo moisture retention at rim joists. This acoustic/fire-rated board absorbs bulk water when basement or crawl-space humidity exceeds 70% during Schertz’s spring storm season, losing its R-value and supporting mold. We strip the affected AFB evo, treat the substrate, and apply closed-cell spray foam at the rim joist, which both insulates and creates a vapor barrier.
- TopRock DD sagging on commercial flat roofs. The dual-density board separates at the interface layer when subjected to repeated thermal cycling, common on Schertz retail buildings with dark membrane roofs. We remove the failed sections and replace with closed-cell spray foam, which bonds directly to the deck and eliminates the delamination risk entirely.
- RockSono Base vibration loosening in garage ceiling applications. The friction-fit installation loosens around HVAC linesets and recessed lighting housings, creating noise paths and air leaks. We pull the loose batts, seal all penetrations with acoustical sealant, then spray open-cell foam for both insulation and sound attenuation.
- Comfortboard 110 thermal bridging at steel studs. The rigid board can’t compress to fill the web cavities in metal framing, leaving conductive paths. We supplement with closed-cell spray foam injected into the cavity, achieving the continuous insulation value the Rockwool alone couldn’t deliver.
Our Rockwool Spray Foam Insulation Process
- 1
Call and scheduling. A live person answers 24/7. We book a site visit, send a text with your technician’s name, and arrive on schedule.
- 2
Blower-door test and thermal imaging. We pressurize the house to measure air leakage in CFM50, then use infrared to map where the Rockwool is bypassed by air movement. In Schertz’s 2015-2020 builds, we regularly find 3,800-5,200 CFM50 with the Rockwool still in place, performing as an air filter, not an air barrier.
- 3
Written price and scope. We specify removal versus retention of existing Rockwool, the spray foam type (open-cell or closed-cell), and the target post-work blower-door number. No work starts without your signature on a flat price.
- 4
Air sealing first, then insulation. Seal the leaks first. Then insulate. The attic doesn’t care how thick the insulation is if the air is still moving through it. We seal top plates, can lights, duct boots, and chimney chases before foam goes in.
- 5
Spray foam installation and real-time monitoring. We monitor substrate temperature and ambient humidity during application, critical in Schertz where afternoon attic temps can affect foam adhesion if the crew rushes the prep.
- 6
Post-work documentation. Final blower-door test, thermal-imaging summary, depth-stick photo log, and your printed record. On a recent job in the Sedona subdivision, we dropped a home from 4,200 CFM50 to 1,850 CFM50. The homeowner got the numbers in writing.
What Rockwool Spray Foam Insulation Costs in Schertz
Most Rockwool-to-spray-foam conversions in Schertz fall in these ranges:
| Job Type | Typical Range | What Moves the Price |
|---|---|---|
| Open-cell spray foam, attic (remove Comfortbatt, seal, foam roof deck) | $2,800 - $4,200 | Attic square footage, pitch, existing wiring density |
| Closed-cell spray foam, rim joist (remove AFB evo, treat, foam) | $1,800 - $3,200 | Linear feet of rim, crawl space headroom, moisture damage extent |
| Closed-cell spray foam, garage ceiling (remove RockSono, seal penetrations, foam) | $2,200 - $3,800 | HVAC lineset routing, lighting count, firewall requirements |
| Hybrid: retain Rockwool, supplement with spray foam at gaps | $1,400 - $2,600 | Accessibility of bypass locations, foam thickness needed |
Prices include removal and disposal of existing Rockwool, air sealing, spray foam installation, and your Documented Photo Record. We also offer a Free Second Opinion on any written estimate you’ve already received. Call (830) 402-5240 for an exact quote, estimates are free.
Why Schertz Homeowners Call Topside Attic Insulation Schertz for Rockwool Work
We’re an independent Rockwool service provider, not affiliated with or authorized by Rockwool, which means we evaluate your insulation without a manufacturer’s product bias. Wes Okafor and our crew have worked the Schertz corridor for several years, including jobs where we’ve measured attic temperatures at 142°F before touching a single batt. We carry Owens Corning, Johns Manville, Knauf, Rockwool, CertainTeed, Icynene, Demilec, and GreenFiber materials, plus Reflectix for radiant barrier applications where it makes sense, so the solution fits the house, not our inventory. Every job gets the 365-Day Done Right Promise, a written price before any work starts, and a live person on the phone 24/7. The documentation you walk away with, blower-door numbers and photo logs included, is the point.
FAQs
Does spray foam void my Rockwool warranty?
Rockwool’s product warranty covers manufacturing defects, not installation choices by subsequent contractors. Removing or covering Rockwool with spray foam doesn’t void anything, because the warranty doesn’t extend to field modifications. We document the condition of existing Rockwool before removal with photos, so there’s a record if a manufacturing defect later surfaces in untouched material elsewhere in the home. Call (830) 402-5240 if you want us to review your specific Rockwool lot numbers.
Can you match Rockwool’s fire rating with spray foam?
No, and we won’t claim otherwise. Open-cell and closed-cell spray foam require an ignition barrier or thermal barrier to meet code, depending on application. In Schertz, we typically use intumescent coating or a prescriptive gypsum layer where fire rating is required. If your original Rockwool was specified for a one-hour assembly, we’ll tell you exactly what additional layer is needed to maintain that rating with spray foam. Call (830) 402-5240 for a code-compliant scope.
Is it cheaper to repair the Rockwool or replace it with spray foam?
Repairing settled or moisture-damaged Rockwool is rarely cheaper than removal and spray foam conversion, because “repair” means re-battling, re-supporting, and still not addressing air leakage. In Schertz’s climate, we’ve found that Rockwool owners who choose spray foam typically see utility reductions that offset the conversion cost within 4-7 years. We’ll run the numbers with your actual usage history during the estimate. Call (830) 402-5240 for a written comparison.
How soon can you start after I call?
Most Rockwool spray foam jobs in Schertz are scheduled within 3-5 business days, same-day for urgent situations like post-storm water intrusion in AFB evo applications. We don’t book installs on Fridays if the Thursday pre-work inspection turns up something that needs proper addressing first. Call (830) 402-5240 to check current availability.
Do you use OEM Rockwool accessories or aftermarket?
We don’t use Rockwool accessories when converting to spray foam, because the accessories are designed for mineral wool retention, not foam application. For air sealing prior to foam, we use Tremco acoustical sealant, 3M firestop products where required, and closed-cell foam for penetration sealing, all sourced from the same suppliers that serve commercial envelope contractors in San Antonio. The materials are specified in your written scope before work starts. Call (830) 402-5240 for specifics.
Written by Wes Okafor, Owner, Topside Attic Insulation Schertz at Topside Attic Insulation Schertz, serving Schertz and nearby areas.