What information is needed for a SAP calculation?

SAP calculations are produced using a computer model.  They do not require the assessor to visit the site of the building.  As a result it is important that accurate and reliable information is submitted to the assessor.

The exact information required will vary from project to project and your assessor will discuss this with you.  The following is a list of the information typically required:

  • The full building address.
  • The correct postcode as confirmed by Royal Mail.
  • A site plan including the orientation of the dwelling(s).
  • Scaled plans of each storey of the building (normally at 1:100).
  • Elevations drawings for each elevation.
  • Sectional drawings of the dwelling.
  • Details of the principal heating and hot water system. This needs to include the make and model of boiler, details of heating emitters (e.g. radiators), hot water cylinder size (if applicable) and the system controls.
  • Details of any secondary heating system present.
  • Details of ventilation systems or extractor fans.
  • Details of the internal and external lighting.
  • Details of the construction of all the different floors to the property.  This needs to include the type and thicknesses of insulation and any other building products used.
  • Details of the construction of all the different external walls to the property.  This needs to include the type and thicknesses of insulation and other building products used.
  • Details of the construction of all the different roofs to the property.  This needs to include the type and thicknesses of insulation and other building products used.
  • Details of all the doors and windows.  This needs to include the sizes, type of frame, type of glazing, thickness of glazing and any low emissivity applications.
  • Details of any renewable technologies installed in the building.  These could include ground source heat pumps, air source heat pumps, solar water heating, photovoltaics (PV), wind turbines and/or hydrokinetic technologies.

If you are in the process of designing your building, the assessor will be able to help you decide the minimum standards for each system to ensure that your finished building meets the required energy performance standards.

This website uses cookies to offer you the best experience online. Additionally we may collect information you agree to share with us. By continuing to use our website, you agree to our Privacy Policy.