I am planning to install approx. 700 sq' of click style Bamboo flooring with a thin foam layer on the back over Radiant Heat. My question is: Will the foam layer be a problem? other than a slight heat lag or should I be looking for something else? Floor temp approx. 85* - 1/2" gap all around.

Thanks,
Paul

I have found that manufacturers differ when it comes to radiant heat. I would check out their specs and or call them, for their specific product and underlayment questions and requirements.