ROCKWOOL AFB - Acoustical fire batt insulation - Technical data sheet

Nov 2, 2026

Uploaded by Sarah

ROCKWOOL AFB is a lightweight stone wool acoustical fire batt insulation engineered for steel stud and wood stud interior wall and floor/ceiling applications in commercial buildings. The product increases density to reduce sound transmission and supports improved noise control when used within wall assemblies with gypsum boards and resilient channels. AFB is noncombustible and does not develop toxic smoke or promote flame spread, supporting fire-rated partitions and providing additional time for occupants and fire services.

LanguageEnglish

CategoryTechnology

FormatPDF

Pages2

Reading Time5 min

AccessFree to download

Performance

Compliance

Reaction to fire

Nominal density

Corrosion resistance

Air erosion

Thickness and dimensions

Acoustical performance

Fire-rated designs

Specifications and certifications notes

AFB ® Acoustical fire batt insulation ROCKWOOL AFB® is a lightweight, acoustical fire batt stone wool insulation specifically designed for steel stud and wood stud interior wall and floor applications. Its superior sound absorbency and fire protection contribute to the overall comfort and safety of occupants. It provides increased density that reduces sound transmission. Greater noise control is further achieved when AFB® is part of the wall assembly along with gypsum boards and resilient channels. AFB® is noncombustible and will not develop toxic smoke or promote flame spread, even when directly exposed to fire. This helps to provide valuable extra time for people to reach safety and for fire services personnel to control the spread. It is a key component of fire-rated partitions. AFB® comes in a number of thicknesses to meet the requirements of both retrofit and new construction applications. Learn more at [rockwool.com/afb](rockwool.com/afb) Quiet spaces The higher density of ROCKWOOL AFB® can reduce sound transmission, helping to create a quiet and comfortable space. AFB® Acoustical fire batt insulation Technical data sheet Batt Insulation 07210 & 09820* • Blanket Insulation 07 21 16** Acoustical Blanket Insulation 09 81 16** ROCKWOOL AFB® is a stone wool batt insulation for interior partition walls and floor/ceiling installations in commercial constructions where superior fire resistance and acoustical performance are required. | | Performance | Test standard | | --- | --- | --- | | Compliance | Mineral fiber thermal insulation for buildings, Type 1 compliant
Mineral fiber blanket thermal insulation, Type 1 compliant
Mineral fiber blanket thermal insulation, Type 7 compliant
MEA Approval, New York City approval | CAN/ULC S702 ASTM C665
ASTM C553
338-97-M | | Reaction to fire | Flame spread index = 0; Smoke developed index = 0
Flame spread rating = 0; Smoke developed classification = 0
Combustibility of materials at 750 °C-Noncombustible
Determination of non-combustibility of building materials-Non-combustible
Smoulder resistance-0.04 wt% | ASTM E84 (UL 723)1 CAN/ULC S102 ASTM E136
CAN/ULC S114
CAN/ULC S129 | | Nominal density | 2.5 lbs/ft3 (40 kg/m3)† | ASTM C167 | | Corrosion resistance | Corrosiveness to steel, copper and aluminum-Passed | ASTM C665 | | Air erosion | Maximum air velocity-1000 fpm (5.08 m/s) | UL 181 | | Thickness
Dimensions | 1” through 4”(25.4 mm-101.6 mm) in 1/2” increments as well as 5”(127 mm) and 6”(152.4 mm), Wood studs: 15.25” x 47”(387 mm x 1194 mm), 23” x 47”(584 mm x 1194 mm)
Steel studs: 16” x 48”(413 mm x 1219 mm), 24” x 48”(610 mm x 1219 mm) | | | Acoustical performance | Thickness NRC SAA Sound absorption coefficients 125 Hz 250 Hz 500 Hz 1000 Hz 2000 Hz 4000 Hz 1.0” 0.65 0.65 0.05 0.22 0.63 0.84 0.90 0.94 2.0” 0.95 0.96 0.22 0.69 1.09 1.05 0.99 0.99 3.0” 1.10 1.11 0.42 0.90 1.22 1.12 1.08 1.07 4.0” 1.10 1.11 0.73 1.24 1.13 1.04 1.02 1.03 6.0” 1.15 1.14 1.11 1.28 1.15 1.06 1.03 1.01
Contact ROCKWOOL for STC ratings on tested wall assemblies | ASTM C423
ASTM E90 | | Fire-rated designs | ULC classification code: BZJZC
UL classification code: BZJZ | | For more information regarding the certifications and listings of our stone wool insulation products, please visit: [rockwool.com/certifications-and-listings](rockwool.com/certifications-and-listings) USA Specifications and Sizing Issued 07-2026 Supersedes 11-2025 1 Meets Class A requirements for flame spread and smoke-developed indices as per IBC. † Density will change with thickness. Density is not a performance criteria but is commonly referred to when specifying insulation. Actual density is the true density of the insulation and Nominal density is the effective density of the insulation relative to a historic benchmark where the insulation contained 40% non-fibrous content also known as Shot (ASTM C612-99) . Please contact ROCKWOOL for more information.

FAQs

What applications is ROCKWOOL AFB designed for?

ROCKWOOL AFB is designed for interior partition walls and floor/ceiling installations using steel stud and wood stud construction in commercial projects requiring superior fire resistance and acoustical performance.

How does ROCKWOOL AFB improve acoustical performance?

Its higher density helps reduce sound transmission, and better noise control can be achieved when AFB is part of a wall assembly with gypsum boards and resilient channels.

What fire and smoke performance does ROCKWOOL AFB provide?

AFB is noncombustible and will not develop toxic smoke or promote flame spread even when directly exposed to fire, helping support fire-rated partitions and giving extra time for evacuation and firefighting.

Nov 2, 2026

Uploaded by Sarah