Thermacoustic Ltd has worked with top independent sound consultants with whom we have developed procedures which have culminated in THERMACOUSTIC LTD being prepared to offer clients a minimum performance guarantee to meet the requirements of building regulation E, when required for air-borne and impact noise.The best specification in the world can fail a sound test if it is not installed correctly leading to considerable additional expense of re-work and further sound tests. These are non-budgeted costs for which no one wants to accept responsibility.