For atypicaal large coldroom, operating at 0degC, with a raised floor (concrete slab below)- I would ensure that the floor in insulated.

(Besides the higher heat gain)

Questions
a) Is there a method to calculate the desire thickness of polyurethane insulation floor panels?
b) Is ther a formula I could use to calculate if condensation would form. (Ambient temperature belwo the floor would be typically 25oC)

Thanks