Insulation under raft foundations 1

[drape]

Can anyone advise if its a usual detail to put insulation under a lightly loaded simple raft with stiffening edge beams with say 10kn/M2 gravity loading applied on the perimeter beams? If so, what is the product specification for this insulation?

 

[SlideRuleEra]

One product for this application is Dow "Floormate". Here is a link

http://www.dow.com/styrofoam/europe/uk/ins/floors/gb_des.htm

http://www.SlideRuleEra.net