SAP ratings for New Dwellings at Design Stage
The Standard Assessment Procedure (SAP), is used to determine the energy efficiency of a dwelling. The ratings range from 1 to 100. The higher the SAP score, the more energy efficient the property.
SAP 2013 came into effect on 6th April 2014 together with Part L 2013.
The ratings are based largely on the energy costs for space and water heating. Increasingly the effects of renewable technologies will be considered and the Fabric Energy Efficiency is also measured and needs to be at or below the target.
Many local authorities also require a carbon off-set incorporated in the design before planning permission will be granted. We can help achieve this. SAP ratings establish a means for both the home owner and purchaser to understand the running costs and environmental impact of the property.
With continuing rises in fuel costs these constitute strong selling and marketing points for all homes.
It is an integral part of the government’s aim to reduce carbon dioxide emissions and achieve near zero carbon for homes. To be comparable for all properties, the SAP rating is adjusted to floor area, so that it is essentially independent of dwelling size. It takes into account the following range of factors, which contribute to energy consumption:
Thermal insulation of the building fabric
Efficiency and control of the heating system
Ventilation characteristics of the dwelling
Solar gain characteristics of the dwelling
The fuel used for space and water heating
The Six Steps to Compliance are:
Predicted CO2 should be no greater than target emissions (TER v DER)
The fabric energy efficiency should be no greater than target (DFEE v TFEE)
Performance checks to ensure the project is no worse than minimum standards.
Check no excessive overheating in summer.
Actual construction performance complies with Part L.
Provide efficient operation and maintenance instructions.
Part L 2013 and SAP 2013
The SAP rating is a legal requirement enforced by the government through building control and applied to all new dwellings. The SAP calculation establishes the domestic compliance with the Building Regulations Approved Document Part L, Conservation of Fuel and Power.
Part L 2013 presents significant challenges for designers and builders – but we will guide you to compliance.
Design compliance problems can be overcome when building design professionals contact us at early stage. Building Control Bodies will need energy calculations to be provided for each property at submission stage in accordance with the Part L 2013 requirements.
Our report includes a Building Regulation Compliance Report for submission to Building Control indicating how the proposal meets the required standards.
The report also contains a Predicted Energy Assessment. Where a developer is selling “off plan” it provides useful information for any prospective purchaser as no Energy Performance Certificate will be available at this stage.
Many local authorities are now requiring a “renewable energy” element in the design at Planning Stage. Again we can produce carbon off-set calculations to prove this.
Talk with us now for all your SAP needs.
Contact us now – or just to have a chat! – 01485 534029