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BU584 Sealed-joint design - claddings (2015)

Product Description

Sealant-filled joints are commonly used as a frontline defence against water entry, and the design of the joint is critical to the performance of the sealant. This bulletin outlines the joint design parameters for sealant joints between cladding elements.

This bulletin updates and replaces Bulletin 440 Sealed joints in external claddings – 1: Joint design.

The bulletin covers:

  • sealant joint types
  • joint design
  • weatherproofing performance
  • environmental issues
  • irreversible shrinkage
  • inaccuracies arising from manufacture and construction
  • fit problems
  • sealant width-to-depth ratio
  • back-up materials and bond breakers
  • installation
  • calculation of joint width.