Yes, DITRA-HEAT-E-HK heating cables can be installed on the top surface of shower benches. Care must be taken to install the heating cable without damage into the matting and Schluter™-KERDI must be installed on top of the DITRA-HEAT installation.
Acceptance of electric floor warming in a shower and on the top surface of shower benches must be verified by the local inspector or authority having jurisdiction (AHJ).