HD1020 Hush-System IC: Acoustic insulation system for timber floors and ceilings

The HD1020 Hush-System IC provides an excellent way to acoustically upgrade separating floors and ceilings constructed using timber joists.

Perfect for new build, refurbishment or conversion, this fully tested system creates a separate suspended ceiling using hangers attached to the existing joists, a method that breaks sound transmission paths. The voids are in-filled with Hush Slab 100 sound absorber to ensure airborne and impact noise is minimised.

HD1020 complies with all the UK Building Regulations relating to sound insulation in buildings - Approved Document E (England & Wales), Part G (Northern Ireland) and Section 5 of the Technical Standards in Scotland. 

The system comprises:

• Hush Panel 28, installed with all T&G joints glued using Hush Bond, laid over Hush-10 Joist Strips, secured to joist tops as per manufacturers instructions, with all perimeters sealed using Hush Seal 20.
• Independent ceiling joists attached on hangers, with Hush Slab 100 fitted between.
• Two layers of 12.5mm Gyproc Soundbloc plasterboard secured to the underside of the ceiling joists. All perimeters are then sealed prior to skimming.

Acoustic Performance *

Impact (L’nT,w) - 52 dB

Airborne (DnT,w) - 57 dB

Airborne (DnT,w + Ctr) - 51 dB

* Results based on 200mm timber joists at 450mm centres with 100mm ceiling joists.