Quote Originally Posted by Tuerto View Post
There are options, the iso insulation that comes in blanket form might be allowed, reducing loss of height, although the floor screed will have to be a minimum of 75 mm up to 100 mm with chicken wire over the insulation. Madness!
If it was mine I’d be very much inclined to take the existing slab up, reduce the levels inside the room and put a traditional floor in to nigh on the same height as it is now, membrane, insulation the lot. Regs have changed on inside to be 150mm above outside with disabled access to the fore now so that problem’s solved, Mike said existing drainage was nearby so a run of Aco’s into that may help. Would certainly help with storey heights, bit of heartache at first breaking the slab up but I reckon looking at the finished article you’d think it was well worth it.