Eastern Region - Norwich Centre of Excellence CPD Event
21 October 2019
The October CPD Event held at the Norwich Centre of Excellence was regarding the subject of Sampling for Approved Document E, which was given by Lee Thompson of the Building Compliance Testers Association (BCTA).
Lee commenced his presentation by introducing the BCTA and the future direction by developing its sound testing and thermography schemes together with ventilation, SAP and EPC services. The organisation is working towards UKAS accreditation.
He then discussed the role of The Sound Insulation Testing and Measurement Association (SITMA) which provides site liaison for Testers and Building Control. This has conducted several thousand air and sound tests. It provides a Registered Testers scheme and scrutinises applications thoroughly, having rejected numbers of applications to date. Reasons for refusal have included failure to utilise UKAS calibrated equipment. The Association provides an auditing process and has conducted over 100 unannounced audits. Industry leading software enables SITMA to advise companies such as Robust Details on the outcome of tests. It provides for lodgement in advance and training is run independently by Solent University.
Lee then turned to the types of testing undertaken by SITMA - airborne tests to ISO 140-4 and impact tests to ISO 140-7 and dealt with the calibration of the equipment used. He then discussed Test Sets and Standards and the requirements for separating walls and floors in dwelling houses and flats. He emphasised the place of good design.
The concept of grouping was then discussed, and this has two stages according to the type of property and type of construction. The same plot type and construction may be further sub-grouped if there are differences in construction make up.
Lee proceeded to demonstrate sampling. Members were invited to provide their thoughts on the number of tests and sets of samples for various numbers of houses and flats including a comparison between semi-detached houses and terraces. The effect of constructional detailing was made clear.
The common reasons for failure, need for remedial work and further failure on retesting were then discussed.
Members questions during the presentation included those on the effect of the size of room to be tested and the problems of testing small rooms, testing stairwells, and testing when properties were complete and furnished.