Premium Rockwool insulation installed across the Bay Area — fire-resistant, moisture-proof insulation for superior performance.
Tell us about your project and we'll follow up with next steps — usually the same day.
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Rockwool's mineral-based construction gives it fire and moisture resistance that standard insulation can't match.
Rockwool insulation—also known as mineral wool—is a premium solution for homeowners who want long-lasting thermal performance, outstanding fire resistance, and superior soundproofing. Made from natural volcanic rock and recycled materials, rockwool is designed to withstand extreme temperatures while maintaining its insulating properties.
It’s ideal for attics, walls, floors, and ceilings where moisture control and noise reduction are key. Our expert team installs rockwool with precision, ensuring maximum performance and a safer, more comfortable indoor environment.
Water-repellent and mold-resistant Unlike other insulation materials, rockwool doesn’t absorb water, making it ideal for moisture-prone areas and resistant to mold growth.
Superior soundproofing The dense structure of rockwool makes it highly effective at reducing noise between rooms and from outside sources.
Excellent fire resistance Rockwool insulation can withstand temperatures over 1,800°F, adding an extra layer of fire protection to your home.
It’s great for attics, walls, ceilings, basements, and between floors—especially in spaces where fire resistance and sound control are important.
Yes. It’s made from natural and recycled materials and is fully recyclable at the end of its lifespan.
Insulation performance is measured by R-value — a rating of how well a material resists heat flow. Higher R-values mean better insulating power per inch, which is why the right material and installed thickness matter as much as just "adding insulation."
Over time, insulation settles, compresses, or gets contaminated by moisture, pests, or age, which quietly lowers its effective R-value even though it's still physically there. That's why a visual inspection alone often understates how much performance has actually been lost.
The Bay Area's mix of coastal fog, inland heat, and mild winters means insulation here does double duty — keeping summer heat out and retaining warmth during cooler nights — so getting the material and coverage right affects comfort year-round, not just in one season.
📍 Santa Rosa
📍 Concord
📍 San Jose
📍 Fremont
📍 Sunnyvale
📍 San Mateo
📍 Walnut CreekWe assess your current insulation and give you an exact, no-surprise quote on the spot.
Damaged, settled, or contaminated insulation is fully removed and hauled away.
We install the right material and R-value for your space, done to code.
We inspect the finished work with you and confirm everything meets our standards.
Every rockwool insulation job is backed by our satisfaction guarantee. Get a free, honest inspection and know exactly what you're paying for before we start.
Cost depends on the size of your home and the scope of the work. We provide a free, no-obligation inspection and give you an exact quote before anything begins — no surprises.
Most jobs are completed in a single day. Larger or more involved projects may take longer, which we'll confirm during your free inspection.
You don't need to stay in the work area itself, but we do ask that someone is available at the start and end of the appointment. Our crew works cleanly and keeps you updated throughout.
Yes — Attic Star is fully licensed, bonded, and insured, and has served Bay Area homeowners for over 25 years.
Common signs include noticeably higher energy bills, uneven temperatures between rooms, visible damage or moisture staining, or insulation that looks thin, compressed, or discolored. A free inspection can tell you exactly what's going on.
Batt, blown-in, cellulose, fiberglass roll, and rockwool each have different strengths — cost, R-value per inch, fire resistance, soundproofing, and ease of installation in tight spaces all vary. We'll recommend the right fit for your home and budget during your inspection.
Properly installed insulation reduces how hard your heating and cooling system has to work, which typically shows up as lower energy usage — though the exact savings depend on your home's current insulation levels and how leaky or well-sealed it is overall.
Fill out the form and we'll follow up to schedule your free, no-obligation inspection — most homeowners hear back the same day. Prefer to talk now? Call us directly.
Takes less than a minute — tell us about your project and we'll follow up the same day.
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