Overheating Calculations - TM59 or Simplified Method

We can provide a simplified method overheating compliance report - helping you to achieve compliance by looking at the size and opening area of the windows to meet Part O standards at the most cost effective price. For properties with large windows compared to the footprint of the building you may need a TM59 Thermal Dynamic Model. We have qualified assessors that provide detailed reports and work with you to make sure compliance is met. Tell us about your project, click the link below!

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SAP calculations, new build, conversion, EPCThe Power of the Sun heats up properties and poses a problem for well insulated buildings. Overheating Compliance is covered in Part O of the building regulations.

What are the Part O Regulations on Overheating?

SAP calculations, new build, conversion, EPC This Sun is the cause of overheating issues, but without it we would not have life on earth!

Part O of the UK Building Regulations, which came into effect in June 2022, specifically addresses overheating in new residential buildings. The goal is to limit the risk of high indoor temperatures in dwellings, especially during warmer months, to protect occupant health and comfort.

Here are the key points and requirements from Approved Document O (Overheating):

  • Minimise unwanted solar gains in summer

  • Provide an adequate means to remove excess heat from the indoor environment