Hi, after years of saving just bought our end of terrace 3 bed semi Now renovating it. Doing work with my sparky brother and getting professionals when needed. I want to put underfloor heating in, and take the radiators out for space(and energy efficiency). But ceiling is already low at 2350mm, I'd rather lower the concrete than retrofit make it even lower and have to worry about doors and staircase. I plan to take the concrete floor down 35mm, put a fresh chemical damp proof membrane. Then use low profile boards and lay either a UF heating screed or direct apply flooring. Just had some builders in to take down a wall and put a padstone and RSJ in. When they excavated the stone got to see the concrete. The intention is to use a floor grinder with diamond cutting over a long weekend to take it down and level it. From the pictures can anyone see a problem with doing it to the concrete floor? Or general problems from this approach? I'm redoing all the pipework as it was complete mess mixed and all over. I will get a Corgi Engineer to connect the boiler into it's new place and UF after all pipework is done.