Installing Radiant floor heating in Siberia
Hello, newbie poster here, seeking your wisdom.
I am building a home in Siberia, Russia. Actually the frame was already constructed this Fall. I have a full basement (2 ft thick concrete walls with 4 inches of Spray foam on the outside and 1-2 inches on the inside). Basement is 2.7 meters below grade and about .7m above grade. Basement's rough floor right now is 6 inches concrete slab, underneath which is 6 inches of XPS insulation. Basement seiling/1st level floor is again concrete panels .22 m thick. The actual house is made with 8 inch SIP panels.
I am planning to install water radiant heating in the basement and the first floor. Here is my 1st question: do I need to have another layer of xps insulation on top of the rough floor, before I lay the pipes and pour concrete? Same question for the 1st floor: do I need to lay a layer of insulation before I lay the pipes?
Thank you in advance,