
90mm Rockwool Flexi Acoustic Sound Insulation Slab (4.32m2/Pack)
by Rockwool
£936.96
MPN123324
Prices updated 18 Jun 2026
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Product Description
Stone wool insulation slab, measuring 90mm 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 90mm thick, the slab delivers higher levels of both acoustic and thermal performance than slimmer profiles, while still maintaining a practical build-up depth.This makes it well suited to partitions and floors where stronger sound insulation, greater heat retention, and assured fire protection are required.
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