Hi, Suhaib :)
Welcome to RE forums....
No need to ask the same question in different forums ...only making confusion .... that is the reason for deleting.
We are not paid for our work here (we are working in some other place to provide our daily bread) and sometime you need to be patient until you get some answer ...
I will try to answer some of your questions:
1. undefloor heating system depend on your facility ... if you have installation with warm glycol water you can use that one ... now that will be quite expensive to install ....my suggestion is to install electrical trace heating (
http://www.flexelec.com/) , but double for safety ...
2. I am not sure about but you can ask manufacturer about ...
3. it will be covered with concrete and you have to do checks during installation before you cover heating cables with concrete
4. no
5. depend on your use ...sometimes tiling ... but maybe in the freezer room epoxy is better
6. from bottom to the top ...
0. dry and healthy soil
0.0 it is also possible to make one slab of 70-80-100 mm to flatten the floor
preparation for vapor barrier - but total price is rising -
1. good poly sheet vapor barrier - must be also on the vertical walls ...
2. heat tracing (my advice - double one working and one spare)
3. polystyrene insulation 300 mm
4. covering paper
5. finished reinforced concrete 100-150 mm
6. epoxy or tiling cover
... you will be surprised when you start to remove frozen soil under your freezer room ...maybe you have to dig 2+ meters to come to not frozen soil.
try to avoid cold bridge between floor and insulation panel walls - wall panel must go down to polystyrene layer ...
to be honest, this is job for professional company ... to give you warranty ...
Hope this will be of some help to you;)
Best regards, Josip :)