Do I need to follow the Approved Documents to comply with the Building regulations?
The legal presumption is if you have followed the guidance in the documents, this is evidence that your work has complied with the Building Regulations. However the guidance in the documents is not statutory and does not have to be followed. If you wish to design and construct your building work in another way, you may do so providing you can show that it complies with relevant regulation requirements.
The guidance in the Approved Documents will be taken into account when considering whether your plans of proposed work, or work in progress, comply with particular requirements.