If I am using Schluter “Ditra” as an underlayment, does the WarmTouch® go over it or underneath it?
DK Heating recommends that the heating element be installed over the Ditra underlayment in order to allow more heat to penetrate the floor covering. If you install the heating element underneath the Ditra, the air pockets within the Ditra will act as insulation and the flooring surface may take longer to warm.