Rockwool Blown-In Insulation in Seguin: What to Know First
Rockwool blown-in insulation in Seguin typically costs $2.80 to $4.20 per square foot installed, and most attic jobs are completed in a single day. As an independent Rockwool service provider, we source Rockwool Comfortbatt and Comfortbatt R-23 from our regular suppliers alongside Owens Corning, Johns Manville, and other lines - no proprietary lock-in, no manufacturer authorization claimed. This page is for Seguin homeowners who already have Rockwool in their walls or attic and need blown-in top-up, dense-pack wall fill, or full replacement after settling, moisture damage, or rodent activity. Call (830) 549-6646 for a written price before any work starts - estimates are free, and we answer live 24/7.
How Rockwool Products Fail - and How We Fix Them
- Comfortbatt settled below top plates in 1980s Seguin ranch homes. The mineral wool fibers compress over 15-20 years in our heat-cool cycles, dropping from labeled R-23 to effective R-15 or lower. We find this constantly in neighborhoods near Guadalupe Regional Medical Center where attics were originally insulated in the mid-1980s. Our fix: remove the settled batt, air-seal the top plates with acoustic sealant, then blow in fresh Rockwool loose-fill or dense-pack to restore full depth and contact with the drywall below.
- Comfortbatt R-23 waterlogged after roof leaks in Hill Country wind-driven rain. Rockwool is hydrophobic - it doesn’t absorb liquid water like cellulose - but the binder can degrade and the fibers clump when saturated repeatedly. We’ve pulled saturated Comfortbatt from Seguin attics after the spring storm seasons that hit the I-10 corridor hard. Our fix: document the moisture source with photos, replace the damaged section, and install a baffle to prevent future wind-wash at the eave.
- Rockwool loose-fill (Granulated or former Roxul Toprock) unevenly distributed by previous installers. The heavier mineral wool requires higher blower pressure than cellulose or fiberglass; undersized equipment leaves thin spots near eaves and valleys. Our fix: we run our machines at manufacturer-specified pressure for Rockwool density, verify even coverage with depth markers, and spot-check with a thermal camera before we leave.
- Comfortbatt compressed by homeowners walking or storing items on attic floor. Mineral wool does not rebound once crushed. In Seguin’s older homes with board flooring over joists, we regularly find R-23 compressed to R-10 or less under foot traffic paths. Our fix: remove the compressed material, install proper attic decking over raised framing if storage is needed, then replace with fresh Rockwool to full depth.
- Rockwool walls with failed dense-pack behind vinyl siding in Seguin’s 1990s subdivisions. The original dense-pack settles away from the sheathing over decades, creating convective loops that feel like drafts even with intact drywall. Our fix: drill-and-fill from interior or exterior depending on siding type, using Rockwool’s higher-density blow to achieve the 3.5-4.0 lbs/ft³ that prevents settling, then patch and match texture.
Our Rockwool Blown-In Insulation Process
- 1
Call and schedule. A live person answers, or you can text. We book a diagnostic visit with a named technician - you’ll get a text when they’re en route.
- 2
Attic inspection and blower-door test. We pressurize the house and measure CFM50 - the single number that tells us how much conditioned air you’re losing. In Seguin’s older stock, we typically see 3,500-5,500 CFM50 before any work. We photograph existing Rockwool condition, depth, and any air leaks at can lights, top plates, and penetrations.
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Written scope and price. Before anyone lifts a tool, you get a flat price, written scope, and written warranty. Haven Standard Clause 1: no work starts without it. Free Second Opinion available on any competing written estimate.
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Air sealing first, then insulation. We seal top plates, electrical penetrations, and can lights with fire-rated caulk and foam. Only after the envelope is sealed do we blow Rockwool to specified depth.
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Post-install blower-door test and photo record. We run the pressurization test again, typically seeing 30-50% reduction in CFM50. You get a printed report with pre- and post-installation ACH50 numbers, plus photos of the completed work. The report goes home with you - the numbers do the talking.
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365-Day Done Right Promise. If it’s not done right, we make it right. The written warranty is in your hand before we leave.
Before
AfterWhat Rockwool Blown-In Insulation Costs in Seguin
Most attic top-up jobs with Rockwool loose-fill in a 1,200-1,800 square foot Seguin home run between $1,800 and $3,400. Full removal and replacement of settled Comfortbatt in the same footprint typically runs $3,200 to $5,800. Dense-pack wall insulation for a 2,000 square foot home with Rockwool runs $4,500 to $7,200 depending on wall cavity count and interior vs. exterior access.
What moves the price: current insulation depth and condition, accessibility (steep roof pitches common in Hill Country custom homes add labor), whether air sealing is needed first, and whether we’re matching existing Rockwool or switching from another brand. We also service Reflectix radiant barrier systems if your attic has a hybrid setup.
Call (830) 549-6646 for a written price - estimates are free, and we bring the scope to you before any work starts.
Why Seguin Homeowners Call Topside Attic Insulation Seguin for Rockwool Work
We’ve sealed and insulated over 9,000 homes since 2016, and the Seguin jobs stick with us because the building stock is specific - 1970s ranchers with board sheathing, 1990s subdivisions with vinyl siding, Hill Country custom homes with complex rooflines. Wes Okafor learned thermal envelope science at Triton College in River Grove, IL, and that building-science foundation means we don’t blow insulation over air leaks and call it done. Every applicable job gets before-and-after blower-door numbers. Every visit gets a Documented Photo Record. Our technicians are background-checked and uniformed, and a live person answers calls 24/7 - no voicemail loops, no callback windows measured in business days.
FAQs
Rockwool’s product warranty covers manufacturing defects regardless of who installs it, but installation errors are not covered. We document our work with photos and blower-door readings so any future claim has clear evidence the product was installed to spec. Call (830) 549-6646 if you need documentation for a warranty filing - we’re happy to provide it.
We source Rockwool Comfortbatt, Comfortbatt R-23, and loose-fill granulated products directly from our regular suppliers. For accessories like fasteners, netting, or baffles, we use quality aftermarket equivalents that meet or exceed OEM spec - we don’t upcharge for brand-name accessories that perform the same function. Your written scope lists exactly what material goes where.
Top-up is cheaper short-term - typically 40-60% less than full removal and replacement - but only makes sense if the existing material is dry, uncontaminated, and accessible. If we find rodent activity, moisture degradation, or compression below R-10 effective, full replacement is the only fix that lasts. We tell you which category you’re in during the diagnostic, with photos, before you decide.
Most attic jobs are same-day or next-day once the written scope is signed. Dense-pack wall work typically schedules within 3-5 business days due to the patch-and-texture coordination. Emergency situations - water damage, failed inspection, pre-sale deadline - we prioritize. Call (830) 549-6646 and a live person will tell you exactly where we are in the schedule.
Rockwool’s color and texture vary slightly by production batch, so new material won’t be identical to 20-year-old batts. For attic top-ups, the visual difference is irrelevant once covered. For exposed applications or partial wall repairs, we discuss blending options during the estimate. If uniform appearance matters, we note it in the written scope and price accordingly.
Written by Wes Okafor, Owner & Lead Insulation Technician, Topside Attic Insulation Seguin at Topside Attic Insulation Seguin, serving Seguin and nearby areas.