New Non Domestic Buildings (Part L2a)
Part L2a of the building regulations require all new non-domestic buildings which is also often referred to as commercial buildings to prepare a SBEM calculation in order to demonstrate that the building’s energy emission rate (BER) is lower than a target emission rate (TER). The process involves a set of desktop calculations prepared using drawings and specifications. Part L2a requires that the SBEM calculation must been submitted to the building control officer prior to commencement of any works onsite.
Our experienced team of SBEM accredited energy assessors are able to work with you to ensure that your project not only passes the BER/TER requirement but does so in the most cost effective manner possible. Our approach for every project is to provide a bespoke solution customised for every client and its project. Our solutions have helped clients save many thousands of pounds which has forged long lasting relationships.
Upon completion of the building the SBEM calculation is used to prepare the Energy Performance Certificate (EPC). Usually a site visit is required to gather photographic evidence of the building as built.
Additionally, upon completion we are able to undertake the Air Permeability Testing for your project too.
Standards For New Thermal Elements (Table 3 - Part L2a)
For guidance only, below are the limiting u-values for
Vehicle Access Doors
Swimming Pool Basin
Non Domestic Extensions (Part L2b)
If you are building an extension to an existing non-domestic or commercial building Part L1b of the building regulations requires the works to be assessed using the SBEM calculation methodology to ensure compliance with the limiting values provided in the building regulations.
The requirements for extensions to existing buildings aren't a strict as new build standards and allow for existing elements of the building to be incorporated into the design. However, all new thermal elements must meet the correct levels of
Upon completion of a dwelling the SAP calculation is used to prepare the Energy Performance Certificate (EPC).
Standards For New Thermal Elements (Table 4 - Part L2b)
For guidance only, below are the maximum u-values for
new thermal elements:-
Roof Lights & Windows
Swimming Pool Basin
Pitched Roof - Insulation at rafter level
Pitched Roof - Insulation at ceiling level
Why Use BEAT?
Free Standard U-Value calculations (upgrade to BRE BR 497 U-Values click here)
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Frequently Asked Questions