SBEM Calculations

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

thermal elements:-

Element	Standard W/(m².K)
Doors	2.20
Roof Lights	2.20
Windows	2.20
Vehicle Access Doors	2.20
Swimming Pool Basin	0.25
Floors	0.25
Walls	0.35
Roofs	0.25

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:-

Element	Standard W/(m².K)
Doors	1.80
Roof Lights & Windows	1.80
Windows	1.60
Swimming Pool Basin	0.25
Floors	0.22
Flat Roofs	0.18
Pitched Roof - Insulation at rafter level	0.18
Pitched Roof - Insulation at ceiling level	0.16
Walls	0.28

Why Use BEAT?

Free Standard U-Value calculations (upgrade to BRE BR 497 U-Values click here)
Free summer overheating risk analysis
Experienced and qualified assessors providing bespoke low cost solutions saving you money and time
Fast turnaround
Detailed reports and checklists in pdf format
A dedicated assessor from start to finish

When should I get my SAP?

Quite simply, the earlier we are involved, the more influence we can have on easily incorporating small changes with minimal cost which can make big impacts and huge savings in build cost and carbon.
How long does it take to get a SAP calculation?

Generally a SAP calculation takes about 2-3 days to produce, we suggest however you allow 1 week from appointment to allow for busy periods.
What do you need to produce a SAP?

We require drawings including plans, sections, elevations and site plan together with a proposed specification for the materials and insulation together with the heating and hot water appliances.
What happens if my design fails?

Even if your proposed design and specification fails we will provide you solutions and recommendations to successfully achieve a PASS free of charge!
How to get a quote?

Just send us your project drawings via email to info@beatsolutions.co.uk or use our quote request form and we'll send you an electronic quote by return.

Frequently Asked Questions