SAP Calculations show compliance with Part L* of the Building Regulations. SAP Calcs†are required by Building Control at the design stage of a new dwelling to show how the building will comply with Part L. Once built, the dwelling requires a new set of SAP calcs to show that what is built complies with Part L. At this stage we produce the as-built SAP calculations & provide the EPC (Energy Performance Certificate) based on the as-built spec. Building Control will ask for SAP calculations if your extension or conservatory has glazing that is greater in area than 25% of the extension floor area (glazing includes rooflights and glazed roofs). We show compliance by producing 2 sets of SAP calculations, one showing a ‘notional’ extension, and one showing the ‘proposed’ extension. The COâ‚‚ emissions of the ‘proposed’ extension must be no worse than the ‘notional’ extension in order to comply with Part L1B.
SAP calculations are produced by interpreting & inputting dwelling data (areas, volumes, u-values, heating/cooling systems, renewables, etc) into software to show how the dwelling compares to a ‘notional’ building. The dwelling ‘passes’ when the COâ‚‚ emissions (DER) and building fabric (DFEE) are better than the notional building.
SAP calculations are produced by interpreting & inputting dwelling data (areas, volumes, u-values, heating/cooling systems, renewables, etc) into software to show how the dwelling compares to a ‘notional’ building. The dwelling ‘passes’ when the COâ‚‚ emissions (DER) and building fabric (DFEE) are better than the notional building.
