More Building Regulation Changes
Part L is being amended and is due to come into force on 6th October 2010. Many of the changes aim to more clearly distinguish “Requirements” from “Guidance”.
There are also a number of changes, the main ones being:
Design Submissions to be a requirement (in the Regulations) as well as As Built Submissions
No change to the methodology for calculating the TER beyond the 25% reduction in the target.
The guidance proposes a “strategic sequence” for meeting the TER target
Builders to be able to get lower DERs if they adopt procedures that provide more quality assurance e.g. Air Permeability (more pressure testing), Thermal Bridges.
Design Limits for Building Fabric – no changes.
Design Limits for Building Services - expanded to cover micro-generation of heat and electricity.
Clearer rules for air permeability assessment at the As Built stage, involving more pressure testing.
Thermal bridging – 25% to be added on to calculated values if accredited details not used
Party Walls – no longer assumed to have a U value of 0.0 W/m2K; value depends upon construction.
Conservatories – exemption for conservatories of less than 30 m2 to be removed.
We’ll get some seminars organised when they are available.
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