ROCKWOOL AFB 2-1/2 in x 16 in x 48 in Unfaced Mineral Wool Batt Insulation (64 sq ft)

Regular price $557.27

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Mineral Wool Acoustical Fire Batt Insulation

ROCKWOOL AFB® is an unfaced mineral wool (stone wool) batt designed for interior walls, floors, and ceilings in wood or steel stud assemblies. It delivers a durable combination of fire resistance and sound absorption for quieter, more resilient spaces.


Key Features:

  • Fire & Sound Performance: Designed to combine fire resistance with sound absorption for interior stud wall and floor/ceiling assemblies.
  • Unfaced Mineral Wool: Stone wool batt insulation suited for use behind finished surfaces where a facing isn’t needed.
  • Sized for Stud Cavities: 16 in wide x 48 in long batts help fill standard framing bays with a secure friction fit.
  • Durable & Corrosion Resistant: Mineral wool construction resists corrosion and supports long-lasting performance.
  • High-Density Batt: Listed as >2.5 lb/cu-ft density for robust acoustic and fire applications.

Please check the Product Data Sheet Here


Specifications Table:

Specification Details
Brand ROCKWOOL®
Product line / sub-brand AFB®
Insulation type Acoustical Fire Batt (mineral wool batt) insulation
Material Mineral Wool (stone wool / natural stone)
Facing type Unfaced
Thickness 2-1/2 in
Width 16 in
Length 48 in
Coverage area 64 sq-ft
Installation type Ceiling, Floor, Wall
Resists Corrosion, Fire
Density >2.5 lb/cu-ft
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 in wood stud or steel stud assemblies.


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


Q: What material is it made from?
A: It is mineral wool (stone wool / natural stone).


Q: What area does one package cover?
A: 64 sq ft per package.


Q: What size are the batts?
A: Each batt is 2-1/2 in thick x 16 in wide x 48 in long.


Quiet luxury, built into the walls

Think of this mineral wool batt as the invisible layer that makes a room feel composed—muting echoes, softening footsteps, and adding a sense of calm. Its unfaced, stone-wool construction disappears behind finishes while quietly elevating comfort with fire- and sound-focused performance. Use it to refine bedrooms, media rooms, or shared walls where serenity is the true design statement. It’s a practical essential that reads as modern luxury: comfort you can feel, not see.


Upgrade your walls and floors with ROCKWOOL AFB® mineral wool batts for quieter, more fire-resilient interiors.

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