What is the difference between Tested and Certificated BS 7950 Windows?
Tested Product A window manufacturer can submit a window for BS 7950 testing to a test laboratory, accredited to UKAS (United Kingdom Accreditation Service), and pass. However, this does not ensure that the window tested is the same as the mainstream manufactured item nor is representative of the range of windows and sizes. Fittings or locks might also be subsequently changed for those of an inferior quality. The test results then become invalid. Testing was used in the first instance to encourage manufacturers become accustomed to testing under BS 7950 before moving onto full certification. Certificated Products This gives quality assurance. When a manufacturer wishes to comply with the requirements of SBD they must now submit the window range for certification. This involves submission to a UKAS test house, which may or may not be the Certification Authority (CA). A number of windows, representing the whole range, are selected for testing and if they all pass they can be accepted int
