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ROCKWOOL AFB is a noncombustible stone wool batt made for wall and floor assemblies where sound control and fire resistance matter most. It is dimensionally stable and cut to friction-fit into stud and joist cavities, from party walls to plant and manufacturing walls. It comes in several thicknesses, from 1 in up to 4 in, with R-values from R4 to R16, so the same product covers retrofit and new construction. Against fiberglass batts it is denser and stiffer, which helps with low-frequency sound and holds its shape in a cavity; it is heavier to handle and costs more than ordinary thermal batts.
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Owners and installers who use AFB describe it as a dense, stiff batt that cuts noise through shared walls and holds itself in the cavity without fasteners. Complaints center on handling: it is heavy, dusty and rough on skin, and it costs more than ordinary batts.
Rockwool AFB (Acoustical Fire Batt) is a batt insulation made from stone wool. It is designed for wall and floor systems where acoustical performance and fire resistance matter most. The batts are lightweight, noncombustible and dimensionally stable.
The batts are made for friction fit into wall partitions and other system applications, from party walls to plant and manufacturing walls. They cut easily and come in several thicknesses for retrofit and new construction.
The product is chemically inert, so it does not promote corrosion. It has low moisture sorption, repels water, and does not rot or promote the growth of mildew, fungi or bacteria.
