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ROCKWOOL
METAL DECK ACOUSTIC PERFORMANCE

METAL DECK ACOUSTIC PERFORMANCE

Product catalog summary

Overview: This document provides details on the weighted sound reduction index (SRI) for metal deck constructions using Rockwool HardRock Multi-Fix (DD) systems. It includes laboratory test results for various configurations of roofboards and acoustic membranes.

Specifications:

The sound reduction index (Rw) values range from 35 dB to 47 dB depending on the configuration.
Configurations tested include different thicknesses of HardRock Multi-Fix (DD) and varying numbers of acoustic membrane layers.
Materials used include a 1.5mm PVC membrane, a 0.22mm polyethylene vapour control layer, and a 0.7mm galvanized steel profile deck.

Test Results:

35 dB Rw with 150 mm HardRock Multi-Fix (DD) and no acoustic membrane.
36 dB Rw with 210 mm HardRock Multi-Fix (DD) and no acoustic membrane.
38 dB Rw with 150 mm HardRock Multi-Fix (DD) and one layer of acoustic membrane.
41 dB Rw with 150 mm HardRock Multi-Fix (DD) and two layers of acoustic membrane.
41 dB Rw with 210 mm HardRock Multi-Fix (DD) and one layer of acoustic membrane.
45 dB Rw with 210 mm HardRock Multi-Fix (DD) and two layers of acoustic membrane.
47 dB Rw with 210 mm HardRock Multi-Fix (DD) and four layers of acoustic membrane.

Recommendations:

For higher sound reduction, increase the number of acoustic membrane layers and use thicker HardRock Multi-Fix (DD) boards.

Contact Information: For further technical solutions, contact [email protected] or visit www.rockwool.co.uk.

Catalog excerpts

ONSTRUCTION TYPE: Hardrock Multi-Fix (DD) Weighted Sound Reduction Index Metal Deck Weight sound reduction index Sound Reduction Index (SRI) Rw Laboratory Test 35 dB Rw Test Report Number Number of layers of 5 kg Acoustic Membrane Nil 1.5mm PVC membrane mechanically fixed ROCKWOOLHardrock® Multi-Fix (DD) .22mm polyethylene vapour control layer 0 Varying layers of ROCKWOOL Acoustic Membrane (quantities are shown) .7mm galvanised steel profile deck 0 Main image: Typical application of ROCKWOOL HARDROCK® (DD) and ROCKWOOL Acoustic Membrane

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