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 Wale s is set to come into force in November 2022.
Any project registered with building control from 23rd 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.
| FABRIC ELEMENT | SPECIFICATION |
|---|---|
| Windows | 1.4 Wm².K |
| Doors | 1.4 Wm².K |
| External Walls (Houses) | 0.18 Wm².K |
| External Walls (Flats) | 0.21 Wm².K |
| Roof | 0.13 Wm².K |
| Ground Floor | 0.15 Wm².K |
| Air Permeability | 8m³/(h.m²) @50Pa |
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 /services/sap-calculationssap-calculations-wales/