Part L Changes – Wales

The Approved Document Part L for Wales is set to be updated this month. 

This comes after the updated Approved Document Part L for England came into force in June 2022. 

When?

The Approved Document Part L for Wales is set to come into force in November 2022.

Any project registered with building control from 23^rd November onwards will be assessed under the new Part L standards. 

Similarly with England, any project registered before this date will have one year to begin construction in order to avoid the new standards becoming applicable.

Key Points - SAP

The main compliance matrix will be TER/DER as it was previously, however a new requirement called Target Primary Energy Demand (TPER/DPER) is being introduced, again similarly to in England.

There is also a new requirement for all EPCs produced in SAP to be a minimum rating of a B.

Renewables will be a requirement in order to meet the stricter TER requirements, as well as the new TPER requirement. Air source heat pumps and/or solar PV will be required on each project. 

Stricter limiting U-Values are also being introduced as summarised in the table below. As ever – it is highly likely that the majority of these values will need to be bettered in order to achieve overall SAP compliance.

Find out more about how we can help with SAP calculations for Wales, which includes a case study on a project we assisted with in Anglesey https://www.ukbuildingcompliance.co.uk/sap-calculations/sap-calculations-wales/