Updates to Part L1A – Consultation Results
The results of the consultation into the uplift in Part L standards have now been released. Whilst not final, these give a strong indication of the direction in which things are heading…
KEY POINTS
-
Implementation June 2022
-
31% reduction in carbon from existing standards
-
A new ‘energy’ compliance metric in addition to the existing carbon/fabric targets
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Planners can still go above and beyond e.g. London Plan
implementation
- Will apply to projects with their initial notice submitted from June 2022 onwards
- Any project whereby the initial notice is before June 2022 will be judged on SAP 2012 still
- However, this is on the basis of commencement of work for EACH BUILDING by June 2023 (e.g. foundations, piling and/or drainage)
compliance matrix
- Primary Energy: a new metric aimed at avoiding high running costs
- Carbon Emissions (DER)
- Fabric Efficiency (DFEE)
Notional specification
- Targets generated against below specification
- Significant uplift in standards particularly for external walls
- 150mm Cavity or 100mm with high performing rigid insulation likely to be required
| Fabric Element | SPECIFICATION |
|---|---|
| Windows | 1.2 Wm².K |
| Doors | 1.0 Wm².K |
| External Walls | 0.18 Wm².K |
| Roof | 0.11 Wm².K |
| Floor | 0.13 Wm².K |
| Air Permeability | 5m³/(h.m²) @50Pa |
Heating
Two main options for compliance;
- Gas boiler with solar PV (Kw requirement 6.15% of GF area) & Waste Water Heat Recovery
- Air Source Heat Pump to provide space/water heating
Other key points
- Every plot to be air tested (no sample testing)
- Photographic evidence throughout project required
- More comprehensive overheating analysis
UKBC will seek to inform clients of any further changes as and when they are announced.
A final Part L document is expected to be released in early 2022.
Get ready for the significant changes to the Part L1A of the Building Regulations by using our SAP 10 Consultancy Service.