Part L of the Building Regulations is one of the Government's tools for making new and existing buildings more energy efficient and helping to cut down on carbon emissions.

Part L is complicated and can mean a lot of form-filling, but all builders will need to comply. Our handy guide will answer your questions and help you avoid the pitfalls of dealing with the demands of Part L.

Energy ratings are the latest Government gimmick to make people cut down the amount of fuel they use in their homes.

So how do they affect the builders who build those homes? Our Q&A should answer all your questions.