Improve fabric, airtightness and thermal bridging performance
Switch to alternative and renewable systems
Produce the new BREL compliance reports
Carry out air permeability tests on new homes
Provide information for SAP assessors and building control
Provide onsite evidence of your build
Part L masonry construction where to start - updated
Part L masonry construction photographic evidence
Part L timber where to start - updated
Part L timber photographic evidence
Conservation of fuel and power: Approved Document L
We welcome your feedback. Please report any problems, and let us know if there are particular areas where further guidance would be useful.
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