Also see:
3.310.2.10 External decking
Patios and decking shall be suitable for their purpose.
Timber decking, including support, should be naturally durable or treated with preservative to Use Class 4 classification.
Decking that is more than 600mm above ground level should be:
- in accordance with guidance published by the Timber Decking and Cladding Association (TDCA), or
- designed by an engineer in accordance with Technical Requirement R5.
Decking from other materials other than timber including wood composite materials and their support made from the same or similar materials, should be suitably durable and have the following:
- a satisfactory assessment by an independent technical approvals authority acceptable to NHBC and
- designed by an engineer in accordance with Technical Requirement R5.
Last updated: 2nd January 2024