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Sap Calculations, Exactly What Are They?

If you are reading this, you have more than likely been recently asked by somebody, usually your building control officer, to supply sap calculations for your building project. But you probably haven’t been told what sap calculation actually are and why you need them.

You can click the video clip on this page, where Andreas will shed some light on this, or read on.

 

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Richmond upon Thames SAP Calcs For Dwelling Change Of Use

  • Reports for Part L1B Compliance
  • SAP EPC
  • Free Advice
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Richmond upon Thames SAP Calcs For Overglazed Extensions

  • Carbon Emissions Reports
  • Heat Loss Calculations
  • Free Advice
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Richmond upon Thames SAP Calcs For New Builds

  • Reports for Part L1A compliance
  • SAP EPC
  • Free Advice

What does SAP mean?

SAP stands for Standard Assessment Procedure and is the UK government’s method of determining the energy performance of buildings. These calculations are needed to illustrate your building complies with certain energy targets laid down in the building regulations.

In a brief overview, that’s pretty much it.

 

When Are SAP Calculations Needed?

Here are most of the reasons you may well be asked for sap calculations

1. For extensions that have more than the permitted amount of glazing
2. For all new properties
3. For a dwelling that’s changed its use, for example altering a commercial building to residential flats.

The two main areas that the sap calculations will be looking at is that the carbon emissions from the dwelling are within set tolerances and that certain components of the property, for example the roof, windows ,floor and walls comply with specified thermal targets.

The calculations are carried out by a certified and approved On Construction Domestic Energy Assessor. There is not any need to visit the property because all the calculations are carried out from the building drawings . After the calculations are completed, an Energy Performance Certificate or EPC can also be created.

Your Assessor can give you further guidance if the calculations show your building isn’t compliant, as well as inform you which will be the most effective improvements to make. It is essential to liaise with your Assessor as early on in your project as possible because when the building is completed any non-compliances might be quite costly to rectify.

Should you require guidance on a project you could have in , or simply require a quotation, call us or fill in our get a quote form.

 

SAP Calculations in Richmond upon Thames The Ten Most Usual Questions Asked.

Sap Calculations, Exactly What Are They?

This really is quite possibly the most common question asked. Take a look at Andrea’s video explanation above, or read the full explanation here on the right.

Sap Calculations, How Do They Cost

We will be pleased to provide discounts, in particular for properties that are of the same or similar construction. For single properties you would be looking in the range of £120 – £300 depending on the intricacy of the construction and also the dimensions. By providing the plans, it will be possible to get a fixed price quotation.

What’s The Difference Between Sap and EPC

Before we get to the differences, this is what you will require depending on your job.

For a new build property you’ll need – SAP calculations and an EPC.

For dwelling change of use or conversion you’ll need – Sap Calculations and an EPC.

For overglazing on an existing dwelling you’ll – Sap calculations only.

SAP or Standard Assessment Procedure are the calculations of pre defined data set of a buildings design that’s put together to demonstrate the energy performance of a building. EPC is short for Energy Performance Certificate and it’s a summary statement of the SAP calculations in an simple to grasp document, that can also be used to sell or rent out a property.

There are really two kinds of EPCs. First is a SAP EPC that is produced from building plans where all the components of the building are known. This will normally be required by building control to show that the property meets certain targets required by the building regulations. Building control would also have to see the SAP calculations which illustrates in detail whether the many components going into your property comply with the building regulations.

The second variety of EPC is the standard one that will be necessary for anyone who is marketing, or renting out a property. This type of EPC uses what’s called rdSAP, which is short for Reduced Data Standard Assessment Procedure, which is used where specified thermal values of, such as, the walls, roof, floors, etc, usually are not precisely known on an existing property. In this situation assumed thermal values are used based on the age of your property. This type of EPC will be no use to show compliance with any building regulations. Sometimes building control would simply ask you for an EPC, but what they would really require are the Sap calculations (which is the information behind the EPC) and the SAP EPC (which is a summary report of the Sap calculations).

Still confused, after that phone us for additional information.

What Are As Built SAP Calculations

These are the finished set of SAP calculations generated after the dwelling has been completed to show that it is compliant with Part L1A of the building regulations. Prior to the building starting, it ought to have had a set of “Design Sap” calculations to show that the proposed construction, in theory at least, will be compliant with Part L1A.

 

 

Can I Do The Sap Calculation Myself

Unfortunately this is not something that can be done yourself. The calculations have to be carried out by an On Construction Domestic Energy Assessor or OCDEA, working with approved Government software programs. The Assessor must be approved under one of the accreditation schemes and is also regularly audited to maintain their accreditation.

What Information is Needed For Sap Calculations

Your Assessor would advise you of exactly what is needed. Typically you would need the following:

  • Floor Plans to include sections and elevations
  • Orientation of the property
  • Construction specification of walls, roof and floors
  • Specification for all doors and windows
  • Primary and secondary heating
  • Provision for providing  hot water
  • Any renewable technology (if any)

 

Sap Calculations For New Build

Every new property require Sap calculations to show compliance with Part L1A (Conservation of fuel and power in new dwellings) of the building regulations.

 

Sap Calculations For Extensions

It’s now trendy to get large bi-folding doors, sky lights and large amounts of glazing on new extensions. However with the current building regulations the amount of glazing can be no more than 25percent of the floor area of the new extension. So over compensations in the thermal elements in other parts of the property will have to be made to show the CO2 emissions coming from the existing house along with the proposed extension is no worse than the existing house and an extension whose glazing is within the permitted amount judged against Part L1B of the building regulations.

You will need SAP calculations to find solutions and illustrate compliance.

 

Sap Calculations For Conversions

For anybody who is modifying the use of a dwelling, you will need Sap calculations. {The new dwelling will have to comply with Part L1B of the building regulations.}

 

Will I Need Sap Calculations

You will need Sap calculations for any of the following: 

  • Building a new property
  • Changing the use of an existing property (e.g, a barn conversion, commercial building to residential)
  • Extensions with more than 25% glazing
  • Opening up the main house to an existing conservatory
  • Extension where the extension is more than 50% of the original property wall area
  • Garage conversions
  • If requested by building control

This checklist is not exhaustive. Contact us, if you are unsure if you require them.

 

Our Services

What You Can Expect From Us

Trusted & Experienced

Our Assessors are fully qualified and accredited with several years experience carrying Sap calculation in Richmond upon Thames . We also cover the whole of the UK and can help on any job nationwide.

Reliable & Fully Insured

You will be allocated a dedicated Assessor who is also covered by full professional indemnity insurance up to £100,000 and that means you know you’re in save hands.

Prompt Service

We’ll respond to your enquiry within 24 hours. We’ll also help you to deliver your project within your timescale.

Satisfaction Guaranteed

We aim to provide 100% satisfaction and look forward to working with you.

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