Skip to content
Rockwool Stone Wool AFB 2 in. x 16 in. x 48 in. Industrial Insulation Board, Gray
Regular price $100.69Orders start at $399 — combine any items to reach the minimum. Learn more
Rockwool Stone Wool AFB 2 in. x 16 in. x 48 in. Industrial Insulation Board, Gray
ROCKWOOL AFB is a 2 in. thick stone wool insulation board in gray, supplied as 16 in. x 48 in. boards covering 85.33 sq. ft. per bag. It is used for structural fire protection applications. Install between framing members or in cavities where non-combustible mineral wool insulation is required.
Key Features:
- Stone wool board: Rigid mineral wool board made from stone wool for structural fire protection insulation.
- 2 in. thickness: The board is 2 in. thick for cavity and fire-rated assemblies.
- 85.33 sq. ft. bag: Each bag covers 85.33 sq. ft. with 16 in. x 48 in. boards.
- Gray mineral wool: The insulation is gray stone wool.
- Industrial grade: AFB is an industrial stone wool board line for fire protection uses.
Specifications Table:
| Specification | Details |
|---|---|
| Brand | Rockwool |
| Sell unit | 1 bag, 2 in. x 16 in. x 48 in. boards, 85.33 sq. ft. |
| Product line | AFB |
| Material | Stone wool |
| Color / finish | Gray |
| Thickness | 2 in. |
| Dimensions | 2 in. x 16 in. x 48 in. |
| Coverage per unit | 85.33 sq. ft. per bag |
| Intended use | Structural fire protection insulation |
| Pack quantity | 1 bag |
Coverage & How Much You Need:
One bag of AFB boards covers 85.33 sq. ft. of wall or cavity area. Boards at 16 in. x 48 in. fit standard stud spacing; plan board count by dividing the area to be covered by 85.33 sq. ft. per bag.
Fit and Compatibility:
AFB is designed for structural fire protection assemblies; verify the specific assembly and thickness requirements with the applicable listing or specification before substituting other ROCKWOOL products. Fasteners or supports for board retention are sold separately.
Frequently Asked Questions (FAQ):
Q: What is included in one bag?
A: One bag contains stone wool boards measuring 2 in. x 16 in. x 48 in., covering 85.33 sq. ft. total.
Q: How many bags do I need?
A: Divide the square footage of the area to insulate by 85.33 sq. ft. per bag and round up.
Q: What is AFB used for?
A: AFB is structural fire protection insulation, commonly installed in wall and cavity assemblies where mineral wool fire protection is specified.
Q: What is stone wool?
A: Stone wool is mineral wool insulation spun from molten stone, known for non-combustible fire performance in this product line.
Q: How is the board installed?
A: Boards are friction-fit or mechanically fastened into framing per the project's fire protection specification; follow the assembly requirements for your application.
Expert Verdict — Reviewed by the SuperArbor Pro Desk
AFB is the stone wool board typically chosen for fire-stopping and structural fire protection cavities; confirm the required thickness and board orientation against the listed assembly before ordering. Cut boards with a serrated insulation knife for tight friction fits between studs, and wear gloves and a dust mask when handling mineral wool. Match coverage by area, not board count, since board packing per bag can vary.
Wear gloves, long sleeves, eye protection and a dust mask when cutting or handling stone wool, as fibers can irritate skin and airways.
Order ROCKWOOL AFB 2 in. stone wool insulation board for your fire protection assembly.
All third party trademarks, including logos and icons, referenced on our website and product pages remain the property of their respective owners. Unless specifically identified as such, Arbor's use of third party trademarks does not indicate any relationship, affiliation, sponsorship, or endorsement between Arbor Home and the owners of these trademarks. Any references by Arbor Home to third party trademarks are to identify the corresponding third party goods.
