ROCKWOOL AFB Acoustical Fire Batt Insulation, Unfaced Mineral Wool, 3 in x 19.2 in x 47 in (62.7 sq ft)

Regular price $90.99

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Unfaced mineral wool batt insulation (AFB)

ROCKWOOL AFB® is an unfaced stone wool (mineral wool) batt insulation designed for interior walls, floors, and ceilings to help improve sound absorption and fire resistance. Its semi-rigid batts friction-fit between wood or steel studs for a tight, durable cavity fill.


Key Features:

  • Acoustic + fire performance: Stone wool batt engineered for sound absorption and fire resistance in interior assemblies
  • Fast, secure friction-fit: Designed to fit snugly between studs for a complete cavity fill with minimal voids
  • Unfaced for flexible finishing: Works with a wide range of wall build-ups and finishing approaches
  • Durable mineral wool construction: Helps resist corrosion and provides a robust, semi-rigid feel for easier handling
  • Multi-surface applications: Suitable for wall, floor, and ceiling installations

Please check the Product Data Sheet Here


Specifications Table:

Specification Details
Product name ROCKWOOL AFB® Acoustical Fire Batt Insulation
Thickness 3 in
Width 19.2 in
Length 47 in
Coverage area 62.7 sq-ft
Facing type Unfaced
Material Mineral wool (stone wool)
Installation type Ceiling, Floor, Wall
Density >2.5 lb/cu-ft
Resists Corrosion, Fire
Sub-brand AFB
Warning California Proposition 65 warning (www.P65Warnings.ca.gov)

Frequently Asked Questions (FAQ):

Q: Where can this batt insulation be installed?
A: It’s intended for interior wall, floor, and ceiling applications, including between wood or steel studs.


Q: Is this insulation faced or unfaced?
A: It is unfaced.


Q: What is it made of?
A: Mineral wool (stone wool).


Q: What size is each batt and how much does a pack cover?
A: Each batt is 3 in thick x 19.2 in wide x 47 in long, and the pack covers 62.7 sq ft.


Q: What performance characteristics are highlighted for this product?
A: It’s described as acoustical fire batt insulation and is listed as resisting fire and corrosion, with density noted as >2.5 lb/cu-ft.


Quiet luxury, built into the walls

Think of this as the invisible upgrade that makes a room feel composed—calmer, more cocooned, more intentional. ROCKWOOL AFB® layers stone wool’s dense, tactile structure behind the finish to help soften noise and add a reassuring measure of fire resistance. Use it to elevate bedrooms, media rooms, and home offices where serenity matters as much as style. It’s the kind of foundational detail that quietly reads as luxury every day.


Upgrade your wall, floor, or ceiling assemblies with ROCKWOOL AFB® for a snug-fitting mineral wool batt that helps boost sound comfort and fire resilience.

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