Hoping someone can give me some fair ball park figures here. Anyone know roughly what a fair price per square metre inc materials to put a latex floor screed over an existing concrete floor for the purpose of then laying 'overfloor' heating panels? Total area around 20 square metres and based in Surrey which I assume won't help with the cost! Job being done as part of a large extension rather than calling someone in just for the day. It wasn't priced in the quote, work was done and now I thinks someone's trying to pull a fast one with the added charge so would appreciate any input before I confront them. Just to be clear, I only want the cost for the latex screed work and materials... cost of and labour for UFH panels and tiling have been priced separately.