Pitched roofs


Timber shall be of suitable durability.

The following timber members should be naturally durable or treated in accordance with Chapter 3.3 ‘Timber Preservation (natural solid timber)’:

  • Porch posts
  • Tiling battens
  • Soffits
  • Bargeboard
  • Fascias and other trim.

Where the roof is to include a fully supported weatherproofing membrane, the following timber components should either be naturally durable or suitably treated:

  • Rafters
  • Purlins
  • Ceiling joists
  • Bracing
  • Sarking
  • Wall plates
  • Battens for fixing vertical cladding.