ZMesh may be installed under any non conductive shingle and can be screwed, stapled or nailed through privided the nails, staples or screws do not come in contact with anything electrically conductive. Proper installation requires that ZMesh be completely covered with ice and water shield. Kits include a 12 Hour Timer, Gutter or Air Sensing Temperature and Moisture sensor, Transformer, Control Box, 9" ZMesh, and a Rough-In Kit with 50' of Cold Lead.