WarmUp & Raychem Undertile Heating You too can benefit from the practicality and style of ceramic or stone flooring coupled with the luxury of underfloor heating in any room of the house. Used either as primary heating or simply to keep the chill off, Warmup Undertile Heating is unobtrusive, inexpensive and easy to install. Undertile heating can be installed in hours without the need for specialist tools or skills but you should use an electrician for the wiring. There is no need to dig up the floor and no need to mix concrete. Simply tape the heating element to the subfloor and lay your tiles... it's as simple as that.