Go to www.trafficcontrolcaroms.com. Click on carom table accessories. Click on Misc. This is the thermostat that will set the temp to your slate. Go to home depot for roof ice melting cable. Purchase 100ft of cable and aluminum tape. Approx $70. Tape cable to bottom of slate snaking up and down with about a 3" gap between the rows. Attach cable to thermostat, tape sensor to slate and you're good to go.