AFB evo Acoustical Fire Batt Insulation - Technical Data Sheet - Batt & Blanket

Nov 2, 2026

Uploaded by Fahsai

ROCKWOOL AFB® evo is a lightweight acoustical fire batt stone wool insulation designed for steel stud interior wall and floor/ceiling applications in commercial construction. It is formaldehyde free, noncombustible, and engineered to deliver improved sound absorption and reduced sound transmission. The sheet provides technical performance data including fire reaction indices, nominal density, corrosion and moisture behavior, dimensional and thickness options, and acoustical performance coefficients, along with UL validation and applicable standard test references.

LanguageEnglish

CategoryTechnology

FormatPDF

Pages2

Reading Time5 min

AccessFree to download

Product Overview

Greener Building and Certifications

Applications and System Integration

Wall Assembly for Noise Control

Technical Data

Compliance and Fire Reaction

Density, Corrosion, and Moisture Response

Thickness, Dimensions, and Acoustical Performance

Fire-Rated Designs and Codes

ULC and UL Classification

AFB ®evo Acoustical fire batt insulation ROCKWOOL AFB® evo is a lightweight, acoustical fire batt stone wool insulation for steel stud interior wall and floor/ceiling applications. This insulation, manufactured using no-added formaldehyde binder, provides superior sound absorbency and fire protection that contribute to the overall comfort and safety of occupants. AFB® evo is an optimized solution for architects, specifiers, contractors and building owners interested in pursuing superior green building standards and requirements. AFB® evo offers 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® evo is noncombustible and will not develop toxic smoke or promote flame spread, even when directly exposed to fire. AFB® evo 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) Greener building ROCKWOOL AFB® evo is UL Validated as Formaldehyde Free and has a Red List Free Declare label. AFB® evo Acoustical fire batt insulation Technical data sheet Batt Insulation 07210 & 09820* • Blanket Insulation 07 21 16** Acoustical Blanket Insulation 09 81 16** ROCKWOOL AFB® evo is a no added formaldehyde stone wool batt insulation for interior partition walls and floor/ ceiling installations in commercial constructions where superior fire resistance and acoustical performance is required. ROCKWOOL AFB® evo is UL validated to be Formaldehyde Free. | | Performance | Test standard | | --- | --- | --- | | Compliance | Mineral fiber thermal insulation for buildings, type 1 compliant
Mineral fiber blanket thermal insulation, type 1 compliant | CAN/ULC S702 ASTM C665 | | Reaction to fire | Flame spread index = 0; Smoke developed index = 0
Flame spread rating = 0; Smoke developed classification = 5
Behavior of materials at 750°C-Noncombustible
Determination of Non-combustibility of building materials-Non-combustible | ASTM E84 (UL 723)1 CAN/ULC S102 ASTM E136
CAN/ULC S114 | | Nominal density | 2.5 lbs/ft3 (40 kg/m3)† | ASTM C167 | | Corrosion resistance | Corrosiveness to steel, copper and aluminum-Passed | ASTM C665 | | Reaction to moisture | Water vapor sorption-0.00 vol%
Water vapor transmission (3.02 in. thickness evaluated), desiccant method-29 perm (1674ng/Pa.s.m2) Determination of fungi resistance-Passed | ASTM C1104
ASTM E96
ASTM C1338 | | 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) 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 | | Issued 07-2026 Supersedes 11-2025 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) 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 informat

FAQs

What is ROCKWOOL AFB® evo used for?

It is used as acoustical fire batt stone wool insulation for steel stud interior wall and floor/ceiling applications in commercial construction, including retrofit and new construction.

How does AFB® evo support fire safety?

It is noncombustible and will not develop toxic smoke or promote flame spread when directly exposed to fire, with reaction-to-fire performance provided in the technical data.

What acoustical performance information is included?

The technical data sheet lists sound absorption coefficients across multiple frequencies for several thickness options and references standards for determining acoustical performance.

Nov 2, 2026

Uploaded by Fahsai