The best floor covering for underfloor heating is a surface that will transfer heat efficiently from the underfloor heating to the actual flooring you walk upon.
Solid flooring styles such as ceramic or stone tiling, and wooden floors, possess the most favourable thermal characteristics, and therefore represent the best underfloor heating cover options.
That said, there are several flooring styles that will work well. For more detailed information, consult our Advice Centre blog, Is Underfloor Heating Easy to Install?