Congratulations on getting to the final stage! Before the EPC is lodged, we need to make sure everything is in order. Firstly……

  • Let your assessor know if anything has changed since the design specification
  • You’ll need to have an air permeability test – we can arrange this for you. When the design stage SAP calculations were carried out the assessor would have set a target to reach, this is normally 5m3/hm2 (7m3/hm2 in Scotland) but can vary depending on the build and services.

Your assessor will send you paperwork to be signed and returned. We need this to provide evidence when the EPC is audited by our accreditation company. This will include:

  • Specification document issued by us
  • ACDs – thermal bridging sheets must be signed and returned
  • MCS certificate or proof of installation for renewables
  • Air test certificate
  • U-value calculations – these can be obtained through your insulation company (many have online calculators) or provide us a detailed build-up and we can calculate them for you.
  • Full address of the new dwelling – we may need to register this with Landmark which can take up to 48hours

Once we have received all the paperwork we are ready to lodge and issue the EPC

On 1st May 2011 Sustainability labelling was introduced to the Scottish Building Standards through the Building Act.

The labelling system has been designed to reward the achievement of meeting 2010 standards and opting to meet higher levels that include energy and carbon emissions targets but also broader issues such as water efficiency and flexibility in design.

Levels of sustainability are defined as Bronze and Bronze Active, Silver and Silver Active, Gold and Platinum.

The first optional upper level is ‘Silver’. This offers substantial benefits in a range of sustainability aspects and should be achievable by a sector of the mainstream market.

Gold level is much more demanding and initially aimed at those pursuing best practice. Buildings that do exceed Gold can gain Platinum level.

More information on labelling and generating certificates can be found at

If you have a project that you would like to discuss, please contact us

Thermal bridging is an area of a building which has a significantly higher heat transfer due to either a break in insulation or reduced insulation. This would be around openings or where two elements meet i.e. floor to wall, wall to roof etc. When completing a SAP calculation we need to account for thermal bridging due to the heat loss and therefore reduced energy performance of the dwelling. The heat loss associated with these thermal bridges is expressed as a linear thermal transmittance (Ψ-value) – pronounced as ‘psi-value’ Below you can see the thermal bridges that need to be accounted for

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The Standard Assessment Procedure (SAP) is the methodology used by the Government to assess and compare the energy and environmental performance of dwellings. Its purpose is to provide accurate and reliable assessments of dwelling energy performances that are needed to underpin energy and environmental policy initiatives.

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SAP stands for the Standard Assessment Procedure which the UK Government has adopted as the methodology for calculating energy performance in dwellings. This was introduced into the Building Regulations in 1995 as a vital step in the process of improving the energy performance and reducing the CO2 emissions.

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