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REGUPOL sound 47 is an 5/16 in (8 mm) underlay in rolls of PUR-bonded rubber fibers for impact sound insulation under floating screeds. Compact and stable (compressibility c ≤ 0.039 in (≤ 1 mm)), it keeps the build-up thin while giving ΔLw ≥ 22 dB.
Long rolls of 43 × 3.8 ft (13 × 1.15 m) cover large areas quickly, with live loads up to 627 psf (30 kN/m²).