Roof And Gutter Deicing Cables Help Prevent Costly Damage From Ice Dam Formation By Preventing Freezing Of Uninsulated Roof Eaves Valleys Gutters And Downspouts And Allows Water To Drain Freely This Product Is For Use On Inclined Tabshingle Roofs And In Downspouts And Gutters Only To Ensure Water Can Flow To The Ground Cable Should Be Installed On Unheated Portions Of The Roof (Usually The Overhang) As Well As In Valleys Gutter And Downspouts Roof And Gutter Deicing Kits Are Available In Lengths From 30 Ft To 240 Ft These Products Are Found As Deicing And Snow Melting Sets Primarily In Northern Markets Beginning In Early October