INTRODUCTION

Whether old or new, many buildings suffer from sound penetration through their walls. With the development of timber-framed houses, the problem of sound transmission in walls has worsened and needs to be addressed urgently.

The new acoustic protection covers are made from 15mm thick acoustic sponge and are designed to encase electrical outlet boxes in the wall cavity and insulate against airborne sound. The covers are available in single-gang, double-gang, and twin-gang versions.

QUICK AND EASY FITTING

The acoustic sponge covers can be used equally well in new installations and in refurbishment applications. To fit, pass the flexible acoustic sponge cover through the hole in the wall while holding the retaining cord to ensure the cover does not fall into the cavity (the cord can be cut off after the cover is fixed).

Then secure the acoustic cover by pressing the supplied pins through the holes of the zintec metal retaining brackets and into the plasterboard. Push the cable into the electrical outlet box for connection and secured the outlet box in position.

PERFORMANCE

Tested 19-20/1/2004 at Building Test Centre (Ref: BTC13224A) in accordance with BS EN ISO 140-3 (1995) and rated in accordance with BS EN ISO 717/1 (1997) in a Gyproc twin-frame high-performance wall measuring 3.6m x 2.4m with 214mm internal depth.

Acoustic covers comply with the requirements of ‘Robust Details’.

DRY LINING BOXES, GASKETS, AND ACOUSTIC COVERS

Dry lining boxes are the perfect escape route for flames in a fire, because the front plate will sag and allow flames to travel along the path of the cables and into the cavity, to adjoining rooms and the floor above, increasing the risk to life and property.

New dry lining boxes with pre-fitted intumescent gaskets expand in a fire and act as a fully-resistant fire barrier (see illustrations 1 to 5). Intumescent ceiling rose covers are also available (see illustration 6).

ACCEPTED BY ‘ROBUST DETAILS’ SIZES AVAILABLE TO SUIT ALL BOXES