6.9 Curtain walling and cladding

Also see:

3.3

6.9.6 Durability

Curtain walling and cladding systems shall provide satisfactory durability (subject to routine inspection and maintenance). Timber shall be either naturally durable or preservative treated to provide adequate protection against rot and insect attack.

The system should be designed to avoid the need for disproportionate work when repairing or replacing individual components. In addition:

  • primary components should provide satisfactory in-service performance for the design life of the building
  • secondary components should provide satisfactory in-service performance for a minimum of 25 years.

The curtain walling system should be constructed with corrosion resistant or adequately protected materials. The risk of bimetallic corrosion should be avoided by the isolation of dissimilar metals.

Systems should not include materials liable to infestation by micro-organisms, fungi, insects or vermin.

Last updated: 2nd January 2024

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