HD1042 Hush Under Screed 6 Acoustic Insulation System

The HD1042 is an acoustic flooring system for separating floors designed to provide sound insulation under screed floors in all kinds of refurbishment, conversion and new build projects. Fully tested as a complete system, it complies with all the Building Regulations covering the UK - Approved Document E (England & Wales), Part G (Northern Ireland) and Section 5 (Scotland).

It is formed using Hush Acoustics' high quality acoustic materials including the Hush Under Screed 6 Membrane, RD flanking strip, Hush-Slab sound absorber and the Hush MF ceiling system. This is combined with GYPROC Soundbloc plasterboard to complete the system.

The installation process is as follows:

• Start by installing the Hush Under Screed 6 Acoustic Membrane over the masonry structure. Ensure the Hush Under Screed is installed as per the installation guide.
• The screed is then laid over the Hush Under Screed Membrane. No screed should bridge the masonry construction.
• The perimeters of the screed are then isolated using the Hush RD Flanking Strip.
• Install the Hush MF Ceiling to the underside of the masonry construction. Ensure a 150mm void is created from the underside of the masonry to the back of the plasterboard lining.
• Install the Hush Slab 100 Sound Absorber within the Hush MF Ceiling System.
• Finish by fitting a double layer of 12.5mm Soundbloc Plasterboard to the underside of the Hush MF Ceiling System.

Acoustic Performance*

Impact (L’nT,w) - 48 dB

Airborne (DnT,w) - 51 dB

Airborne (DnT,w + Ctr) - 49 dB

* Results based on the full Hush System HD1042 being using and installed as listed above. All flanking paths must be treated correctly.