I am planning to make my sauna a bit smaller by angling one of the corners at 45 degrees and installing a new sauna door in the sloped section. To do this, I need to tear down part of the existing walls, which are made of concrete. I'm not sure if it's concrete block or not. On my old building plans, it says "Wall System A40/A10" on the basement foundation drawing. Does anyone know what that means? How can I best demolish the wall to get a clean and neat "finish"? Diamond cutting disc?
