Doing up a 30's house which mostly has suspended floor, there is a small rear extension which will have a poured floor. These 2 floor types will meet- whats the best way to install ufh across the two meeting floor types? Or is it best to just ask the builder to make the rear extension suspended aswell so its a better match. Dont want to get rid of suspended floor in main part of house. Have taken it back to brick so redoing from scratch. Will be laying the UFH ourselves.