Overheating
Building regulations introduced in June 2022 limiting summer overheating in new residential buildings in England. Applies primarily to new dwellings and material change of use to residential, not generally to extensions of existing dwellings. Sets two compliance routes: a simplified method based on glazing area, ventilation openings and shading, or a dynamic thermal modelling method (CIBSE TM59). Building control checks Part O at design stage for in-scope projects.
Also known as
Pages where Part O comes up
None of the buildwiz guides currently reference Part O. New mentions will appear here as more guides are published.
Want the full picture?
The buildwiz build guides walk through a UK extension in sequence and link to Part O (and every other Approved Document) at the exact stage it bites. That is usually a more productive way to use this material than reading the document cover to cover.