So.. House we are purchsing has active sulphites in the infil material below the concrete so has to be removed down to 800mm below current floor level.
So I want to put in a underfloor heating system, speedfit for example. I want it to be insulated and have been reccomended 100mm of kingspan or equivalent. 50mm of liguid screed to cover the pipes and then maybe karndean above.
What im not sure is the make up of the rest of the floor. Dolomite, sharp sand blind. DPM insulation,concrete, insulation pipes then screed.
Confused really. Any help would be appreciated. Obviously working to building regs. Its the complete downstairs of a semi.
Ive spoken to 4 builders and each has a different idea on the make up of the floor. They are more the traditional style of builder. We dont have a big budget.