Wed, 22 Apr 2026 10:33:29 +0100 https://www.greenbuildingforum.co.uk/newforum/ Lussumo Vanilla 1.0.3 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=14937&Focus=254860#Comment_254860 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=14937&Focus=254860#Comment_254860 Fri, 24 Feb 2017 17:40:13 +0000 goodevans
1) The version on the government website/planning portal including 2016 amendments.
or
2) The 2013 version because the planned 2016 amendments were withdrawn in last years budget.
or
3) The 'new' regs aren't really enforced - so you can still build a 100+100+100mm filled cavity wall and tell the BCO company and the SAP company to use the 'old' regs.

What happens in your area - looking at current new builds in my area I fear option 3 is in operation.]]> https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=14937&Focus=254862#Comment_254862 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=14937&Focus=254862#Comment_254862 Fri, 24 Feb 2017 17:46:16 +0000 DarylP It depends what question you are asking?

Part L Building Regs is Conservation of Fuel and Power.

AD L1A is Approved Document L1A for new build dwellings.
AD L1B is for conversions, extensions, change of use dwellings.

The 'version' of Part L that applies to your dwelling depends on the submission date/application date/approval date from your Building Control Body.
A spade in the ground can secure B. Regs approval for a whole site... ]]> https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=14937&Focus=254864#Comment_254864 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=14937&Focus=254864#Comment_254864 Fri, 24 Feb 2017 18:13:24 +0000 goodevans
If the BCO dosen't enforce, who does?]]> https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=14937&Focus=254869#Comment_254869 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=14937&Focus=254869#Comment_254869 Fri, 24 Feb 2017 20:12:59 +0000 DarylP
Part L is Building Regs.
AD L1A is the Approved Document that gives a method of compliance.

But you DO NOT have to follow AD L1A, if you can convince your BCO that your dwelling meets Part L....
Cheers]]> https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=14937&Focus=254882#Comment_254882 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=14937&Focus=254882#Comment_254882 Fri, 24 Feb 2017 22:56:18 +0000 ringi