External timber framed walls

6.2.11Timber preservation

Timber and timber products shall either be naturally durable or treated with preservative to give adequate resistance against decay and insect attack.

The following should be treated in accordance with Chapter 3.3 ‘Timber preservation (natural solid timber)’:

  • Timber framing.
  • Timber cladding.
  • I-studs manufactured from timber of durability class ‘moderately durable’ or lower.