Independent tests on Norbord’s Caberdek Eooring have conDrmed that the company’s new CaberDx Joint &amp; Joist adhesive can help signiDcantly reduce the passage of airborne noise in timber Eoor constructions. <br> <br> The most recent tests, carried out by independent acoustic consultancy Sound Research Laboratories Ltd (SRL), were conducted in partnership with engineered timber manufacturer, James Jones, using its 220mm JJI-Joists. <br> <br> The Eoor tested was James Jones’ standard solution for intermediate Eoors within dwellings, designed in accordance with the October 2010 acoustic performance targets of Part E of the Building Regulations. <br> <br> Comprising 22mm Caberdek boards on 220mm deep timber joists placed at 600mm centres, the Eoor incorporates 100mm Knauf SK Acoustic Roll insulation with a 15mm Knauf plasterboard ceiling screwed to the underside of the joist.<br> <br> In tests, the sample Eoor achieved a noise reduction performance of 44dB Rw which equates to a 12% reduction in sound pressure level. Moreover, while traditional Eoor structures would need a minimum 240 mm deep joist to achieve the current requirement, the CaberDx/James Jones/Knauf Eoor exceeded the requirements without any increase in Eoor thickness.<br> <br>