Fire-resistant, soundproofing, moisture-proof. The preferred insulation for apartments, commercial builds, and fire-rated assemblies — at wholesale pricing with next-day delivery.
No minimum · Pay at delivery · All 50 states
Unlike fiberglass, mineral wool does not melt or burn. It's non-combustible and can withstand temperatures above 2,000°F — making it the default choice for fire-rated wall and floor assemblies, apartment corridors, and commercial buildings with strict fire code requirements.
Mineral wool's dense, rigid structure absorbs more mid-frequency sound than fiberglass. It's widely used in apartment buildings, hotels, recording studios, and any multi-tenant project where party wall STC ratings are specified.
Mineral wool fibers are hydrophobic — they repel water rather than absorbing it. In crawl spaces, below-grade walls, and high-humidity environments, mineral wool maintains its R-value even when exposed to moisture that would degrade fiberglass.
Party walls and floor/ceiling assemblies where building codes require minimum STC and fire ratings.
Fire-rated wall assemblies, mechanical rooms, and sprinklered buildings where non-combustibility is required.
Where moisture intrusion is possible and you can't risk R-value loss from wet fiberglass.
High-humidity rooms where fiberglass can degrade. Mineral wool's hydrophobic structure holds up over decades.
High recycled content (up to 70%) helps with LEED credits. Also contributes to indoor air quality certification as a low-VOC material.
Interior partition walls where maximum STC is the goal. Mineral wool outperforms fiberglass at sound absorption across mid-frequencies.
Tell us: R-value needed, wall or floor application, framing size, quantity, zip code, and delivery date. We'll confirm the right product.
We confirm stock and send an itemized invoice with delivery window. Mineral wool ships the same as fiberglass — next day on stocked product.
Verify the delivery on arrival, then pay via Zelle, Venmo, or check. No upfront payment required.
Both insulate effectively, but mineral wool is non-combustible, denser, more moisture-resistant, and better at sound absorption. Fiberglass is lighter and typically less per bag. The right choice depends on your application. See full comparison →
Less so than traditional fiberglass. Modern mineral wool batts have a slightly rougher feel, but most installers find them easier to handle than older fiberglass products. Long sleeves and gloves are still recommended, as with any insulation.
We stock R-15 (2×4 walls), R-21 (2×6 walls), and R-23 (floor cavities). Other R-values may be available on order — call to confirm availability in your area.
No minimum. Volume earns better pricing — ask when you call.
Call with your R-value, application, and quantity. Same-day quote, next-day delivery on stocked product. Pay at delivery.