Approved Document O: Overheating (2021 edition)

This Approved Document provides guidance on how to comply with Part O to Schedule 1 to the Building Regulations covering overheating mitigation requirements and applies to new residential buildings only. It takes effect on 15 June 2022 but does not apply to work subject to a building notice, full plans application or initial notice submitted before that date, provided the work is started on site before 15 June 2023.

ADO: Overheating contains the following sections:

• Simplified method
• Dynamic thermal analysis
• Ensuring the overheating mitigation strategy is usable
• Providing information
• Key terms
• Compliance checklist
• Areas at a high risk of buildings overheating
  

The guidance in this Approved Document only relates to England.