The requirements of the Building Regulations Part L are difficult to assimilate and apply. This guide will explain the meaning and importance of each clause, and where cross-reference documents are not available in the ADs, the guide aims to either fill in the gaps or provide alternative solutions.There is quite a lot of repetition in the four Approved Documents to Part L of the Building Regulations, so this guide is designed to give a quick 'road map' overview of each section.