Isomass Ltd manufacture a comprehensive range of acoustic insulation systems for implementation under Approved Document E of the building regulations 2003. Over 20 years experience in the building acoustics industry ensures that we can offer honest, practical advice and effective acoustic solutions for most building projects and applications. isomass Ltd’s expertise covers all areas of compliance with acoustic standards for acoustic treatment of rooms for residential purposes in England & Wales, Scotland and Northern Ireland. Our mission is to further enhance our offer by embracing the growing demand to use materials from renewable sources or to implement recycled materials. It is important to understand that sound transmission in buildings results from both airborne and impact noise sources. Airborne sound is generated from sources such as Radio or TV and travels through the air into the fabric of a building. Impact sound is the result of mechanically exciting the fabric of the structure with events such as footfall or the moving of a chair. The acoustic isolation of any adjoining structure can be compromised by “flanking”. Flanking noise occurs where there is an alternative path that sound can use to bypass an insulating element, this could be due to mechanical bridging or hidden cavities, such as poor mortar joints or inadequate dry lining. One of the most common causes for a reduction in sound insulation performance are flanking paths and these must be identified and dealt with before an effective sound insulation solution is adopted. Isomass Ltd. has the expertise to identify and provide solutions for such situations.