This is the most significant change to Part L regulations since the 2013 publication and is designed to get our industry building better houses.
Point1 EXCEED Part L Regulations and support the Government’s commitment to bring all greenhouse gas emissions to net zero by 2050, it is intended to halve energy use in all new builds by 2030. The introduction of a Future Homes Standard (FHS) for new build homes by 2025 is intended to produce homes which are future proofed with high levels of energy efficiency and low carbon heating.
Previously you were permitted to use historic building regulations on a project that had been awarded planning, you will not be permitted to do so going forward. There is a transitional period however, but for that to apply, developers will need to both; submit a building / initial notice, or have deposited plans BY 15th June 2022, and commenced development on each individual building BY 15th June 2023.
Where plans are submitted AFTER 15th June 2022, all homes must be built in line with the new Part L standards. Where plans are submitted before 15th June 2022, but construction does not commence by 15th June 2023, the relevant buildings must build in line with the new standards.
CO2 emissions have been used as the main metric for compliance with building regulations for a number of years, however, this will become less effective as a measure of energy performance as the electricity grid becomes de-carbonised. If not addressed, this could result in a dwelling with low CO2 emissions complying with regulations, despite having excessively high energy consumption. Consequently, the Primary Energy metric has been introduced to ensure that energy efficiency is directly measured rather than assuming it is linked to CO2 emissions.
With proven psi value details, the design versus as built gap is also being addressed, with requirements for provision of photographic evidence and air pressure testing for every plot. Site checklists will be required to be completed and submitted to ensure work is in accordance with specifications and critical junctions satisfy thermal bridging values. 5 air changes per hour (not 10), and moving away from gas boilers, as this will undoubtedly mean you will not be able to comply with the new regulations. Although gas boilers will still be permitted under the interim changes, heating systems will be required to be future proofed for heat pumps with wet heating systems, designed for flow temperatures of 55°C. In addition, with targets based on the use of photovoltaics (PV) it is likely that some degree of PV will be required in design solutions. This will now apply to individual buildings, as opposed to a whole site.
A Y-Value is calculated in SAP (Standard Assessment Procedure) as the total sum of Ψ (PSI) values multiplied by the total length of each junction detail in your dwelling. The lower the Y-Value, the less heat is lost.
The Kingspan TEK™ Building System is a Passivhaus certified system and can be used in the creation of zero energy buildings.
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