I recall 100mm being mentioned, whether they were talking about kingspan or another insulation board i do not know. I could get away with 50mm kingspan :-) but 100mm would give me a higher step that is not really suitable and i dont want to start digging up the concrete floor.
DIY how to tutorial projects and guides - Did you know we have a DIY Projects section? Well, if no, then we certainly do! Within this area of our site have literally hundreds of how-to guides and tutorials that cover a huge range of home improvement tasks. Each page also comes with pictures and a video to make completing those jobs even easier!