Low maintenance Delta-Therm Roof De-Icing systems are engineered for specific roof types including sloped asphalt, standing seam metal, slate, cedar shake, terra cotta, flat rubber membrane, and PVC. They prevent ice formation on roofs, gutters, downspouts and eaves by providing a safe drainage path for water. All M.I. cable assemblies are UL Listed and CSA Certified for Roof, Gutter and Downspout De-icing. Post-installation wiring inspections will extend the warranty period of Delta-Therm IN cable to 5 years, and M.I. cable to 10 years.