Part O of the Building Regulations aims limit unwanted solar gains in the summer and enable occupants to have an adequate means of removing heat from indoor environment. Part O applies to not only new dwellings and flats but also institutional buildings such as care homes and other residential buildings such as student halls of residence.

Full compliance can be shown using either the simplified method or by dynamic thermal modelling for more complex buildings. We offer guidance on the most suitable method at quotation stage and produce the relevant report to show compliance.