System Number: BU567
Description: Leaks resulting from poor flashing design and installation can be difficult to find and expensive to repair. Amendment 5 to E2/AS1, which introduced the extra high (EH) wind zone, also modified a number of the requirements for flashings. This bulletin takes account of those changes and updates/replaces Bulletins 465 Domestic flashing installation and 467 Principles of flashing design.
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Keywords: aluminium, balcony, cladding, condensation, deck, deformation, design, drainage, flashing, joinery, joint, metal, moisture, movement, multi-storey, roof, sealant, weathertight, window