The Building Act 1984 (BA 1984) empowers the Secretary of State/Welsh Ministers to make building regulations for various purposes, including to secure the health and safety of persons in or about buildings. It establishes criminal liability for breaches of these regulations. It also provides for practical guidance to be given with respect to the requirements of the building regulations, by Approved Documents. The Building Regulations 2010, SI 2010/2214 (Building Regulations) are made under BA 1984. They apply to buildings (defined as any permanent or temporary building including part of a building, but not any other kind of structure or erection) and regulate building works, as defined in Building Regulations, SI 2010/2214, reg 3, by broadly doing the following three things, discussed in this Practice Note: • they impose a set of technical requirements that building works need to comply with/be built to, relating to a range of matters including fire safety, drainage and conservation of fuel and power, among others • they set requirements relating to competence of those employed to carry out the building works, materials