Do I need to install new flooring after installing an underfloor heating system? Date: May 26, 2016 - 10:41 pm Vote Up 0 Vote Down Answered Public Underfloor Heating Central Heating NZ asked May 26, 2016 1 answer Vote Up 0 Vote Down Public Central Heating NZ ⋅ Staff ⋅ May 26, 2016 If we are retrofitting a concrete floor the answer is YES, timber floor are usually accessible from below and do not need to be replaced or renewed. #1 Please login or Register to Submit Answer