• Isomass Ltd – Incorporated 2006

Isowave 23 for Ceilings

Acoustic Ceiling System

The Isowave 23 acoustic ceiling system is used to enhance a ceiling that is found to underperform or to provide a high performance ceiling commonly used in home cinemas/studios. Also in situations where commercial activities adjoin a dwelling above or for upgrading separating floors/ceilings where access to the top of the floor is not possible.

This is a versatile system used in refurbishments or new build with a decoupled ceiling as illustrated or otherwise approved by Isomass (on application to technical@isomass.co.uk for our free acoustic detail design service).

Isowave 23 consists of a10mm Isowave acoustic foam measured to BS 4443 and BS EN ISO 845:2009 bonded to 12.5mm high density, square edged fibre-reinforced gypsum board. Isowave 23 system incorporates acoustic foam which is semi rigid and is an excellent absorber with high damping characteristics when bonded to an acoustically reflective stiff surface. Isowave foam is manufactured using water as a blowing agent and is free of CFCs, HFCs or HCFCs. Isowave 23 acoustic ceiling system complies with requirements of EU Regulation No 2037/2000 for ozone depletion and offers good thermal properties.

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Compliance with Approved Document E standards can be achieved; please contact Isomass with specific requirements (on the constructions illustrated).

Isowave performs under the following classifications:

Fire protection 30 minutes (for a single layer)

BS476-7 Fire Propagation Index <12

BS 476-6 Surface Spread of Flame Class 1

Building Regulations Paragraph A13 (b) Class O

Board size: 1197mm x 597mm x 22.5mm
Isowave foam thickness: 10mm
Weight: 17.3kg/m2
Board density: 1300kg/m3
Foam density: Less than 90kg/m3
Sound absorption: αw 0.26

Isocheck Isowave 23, supplied by Isomass Ltd. Units 10 & 11, Avenue Business Park, Off Brockley Road, Elsworth, Cambridgeshire, CB23 4EY and installed in accordance with manufacturer’s instructions / recommendations.

Fix securely to all supports working from the centre of each board outward to the edges using the specified method of fixing at 250mm maximum centres with countersunk cross-slot screws 3.9 x 30mm positioned through a decoupling bar or metal frame. Position fixings not less than 20mm from board edges and 50mm from corners.

The heads of all fixings should be sunk into the surface of the board and stopped with joint filler.

The square edged cement particle board should be sealed with an intumescent sealant, joints to be a maximum 1mm wide. Any excess adhesive to be removed using a spatula once the adhesive has fully hardened.

A tapered edge plasterboard with all edges taped should then be fitted. Skim and lightly sand if required.

Isocheck Isowave 23 for Ceilings product data sheet

  • 200mm x 70mm timber joists @ 450mm centres.
  • resilient bars @ 400mm centres perpendicular to the joists.
  • 100mm 45kg/m3 insulation between joists.
  • Isowave 23.
  • 12.5mm tapered-edged plasterboard with all joints taped.

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