Hi, our architect has advised that we need to get a structural engineer to design our slab for our extension, as our site has been labelled a "problem" site because of a water table and the type of soil we have on our land. We have been given a few names but can any one offer advice on how to select the best one? Should we be asking if they have public liability insurance, do they have to guarantee their work?
Any advice is greatly appreciated. Thanks