
100mm Rockwool Flexi Acoustic Sound Insulation Slab (4.32m2/Pack)
by Rockwool
MPN123326
Prices updated 12 Apr 2026
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Product Description
Stone wool insulation slab, measuring 100mm in thickness and cut to 1200 × 600mm, for use in partitions and floors.With a patented flexible edge, it securely friction fits within framed constructions, reducing the need for excessive cutting and limiting waste on site.In a single solution, it provides reliable acoustic absorption, effective thermal insulation with a conductivity of 0.038 W/mK, and the highest level of fire safety (A1 non-combustible).Its semi-rigid form allows straightforward handling and installation, while maintaining a close fit to minimise gaps that could compromise performance.At 100mm thick, this slab offers a substantial increase in acoustic and thermal performance compared to slimmer profiles. Its greater depth enables higher levels of airborne sound reduction between rooms and floors, while also improving energy efficiency by reducing heat loss through the building envelope.
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