SAP Calculations for New Builds
SAP Calculations for Extensions
SAP Calculations for Conversions

What Are SAP Calculations?

You might be thinking, “what does SAP stand for?” and that is why we are here to explain it for you.

SAP stands for the Standard Assessment Procedure and it is fully designed to help you calculate how much energy your home is going to use. It also helps you to calculate your overall level of Co2 emission and it is a compliance tool that is normally used alongside Part L1A. It helps to satisfy Criterion 1 and even Criterion 2. It can also be used to satisfy Criterion 3 as well and another purpose for it is that it is used to produce the EPC for a dwelling that has been completed.

The SAP calculation is based on the energy balance of the dwelling over one year and it also takes into account a huge range of factors that can contribute to this as well. If you want to see some SAP calculations explained, all you need to do is take a look below to find out more.

  • Target Fabric Energy Efficiency (TFEE)
  • Target Emissions Rate
  • Dwelling Fabric Energy Efficiency (DFEE)
  • Dwelling Emissions Rate (DER)
  • Environmental Impact Rating

If you were to take a look at Part L1A then you will find some guidance on how you can demonstrate that your building has been designed in full compliance with the right energy efficiency requirements for a new build. It is more than possible for you to get more guidance on this and if this is something you are interested in then all you need to do is take a look at the NHBC Foundation NF58 and NF59.

Compliance Criteria:

Criterion 1: Achieving the TER and TFEE.
Criterion 2: Limits on the flexibility of the design and the overall thermal performance.
Criterion 3: Focuses on heat gains in summer.
Criterion 4: Makes sure that the building meets the DER and DFEE rate.
Criterion 5: Ensures an energy efficient rating.

Normally, a SAP assessment is carried out during two stages of the initial construction design. This is normally done at the design stage. At this stage you will need to make a submission to Building Control before any work is started.

The next one is carried out at the Built stage and it is done when the dwelling has been completed and established.

The two submissions that have been mentioned above can be used to try and check your compliance in accordance to the related targets. This must be evident when it comes to your product specifications and when you reach the As Built stage you will also need to create an EPC for the dwelling as well.

Communication is Key

If you want to get the best possible result then you need to make sure that you work closely with your SAP assessor and it is more important than ever for you to make sure that any communication is done quickly and efficiently as well. Your SAP calculation will represent the design and the overall construction of the dwelling and with that, you can achieve both of the compliances you need. Of course, it is important to understand that commercial pressures can impact your construction and for that reason it is more important than ever for you to make sure that you meet all of the requirements needed.

It is very easy for you to find out energy assessments and sometimes you may find that there are obstacles that stand in your way. If you want to get through the whole process as quickly as possible then you need to make sure that you have very clear goals in place.

The first thing you need to do is make sure that you take your fabric approach first, and this needs to be followed by your fit and forget technology. Next would come your renewables and then your other low carbon tech. You do need to remember that your SAP assessor may not be trained in design so you need to keep in mind how much knowledge they will have on the topic and when it comes to product specification as well.

For this reason, communication is crucial when you are making any changes that could affect the efficiency of the dwelling and it is always a good idea to make sure that the new assessment is going to pass before you fully implement any changes. Don’t be tempted to try and tell the assessor what is needed in order to get the A built assessment because this will create issues at a later date when it comes to the audit and the EPC.

SAP Calculation Services