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BS 644 specifies the requirements for the design, construction and performance of fully finished and glazed factory-assembled timber windows of various types. In this standard the performance of windows is determined by testing or calculation in accordance with a number of British and European Standards.
We have prepared a list detailing of each of these Standards, which you can
download by clicking here.
If you require testing for your windows, the BWF offers a wide range of options through our Total Support Services.
Click here to find out more.