From my experience, radiant heat would not affect the cork product.
There are a few vendors that actually encourage using the cork with radiant heated flooring for two reasons:
- as a testament to the durability of the cork and
- the cork helps incubate the heat in an effort to boost the energy efficiency of the cork.
Prior to purchase and installation, I would advise inquiring with vendor about the durability of the cork with respect to the radiant heat and read as much information on the flooring or more products & its performance with cork.
The perception in radiant flooring sometimes is that radiant heat is a fast response heating system but it is based on steady radiation from a thermal mass, which is the tubes.
Always protect the cork or look into a product that can withstand wetness of a drop zone or mud room in your homes. Weatherization is always a keen consideration in flooring in an area that is susceptible to potentially extreme conditions.
For more information:
Read "We are considering radiant heat. Will manufactured bamboo flooring stand up to the challenge?" a Q&A answered by Lily Livingston.