The paths to zero carbon construction have begun to diverge for England and Wales, with Welsh environment minister John Griffiths launching a consultation on Part L of the Building Regulations that looks set to leave English proposals trailing behind.
The Welsh government has unveiled two options for strengthening Part L for new housing: either a 40% improvement on Part L 2010 from the start of 2015 or a staged 25% improvement in 2014 followed by an additional review two years later that would...

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