Hi, I'm looking for some advice on what I need to do in order to create a habitable space in my under pavement vaults. Thsee are the old victorian coal cellars attached to my property. I'm currently thinking a damp proof membrane and pump would meet the requirements. Do I also need to inject it? Also would it be possible for me to get the work done by a normal builder and inspected by an authorised person? Will this allow me to get an insurance backed guarantee on the work? If yes how do I go about it? Thanks in advance for your help.