Roof Deicing
Selection of heating cable. The total heating cable length for deicing is determined by including all elements of the roof system that need protection. Use Tables 1 and 2 to determine the total length of cable. Usually one cable will be sufficient for both roof and gutter areas. For larger installations, use separate cables for roof area and gutter/downspout area.
Installation procedures
•Remove leaves, pine needles, or any combustible debris from roof, gutters and downspouts before installing roof deicing cable.
•Use
•For downspouts longer than 20 feet (6.10 m), use DSH Downspout Hanger (sold separately) to support the heating cable where it enters/exits a downspout.
One hanger is required for each downspout. Always loop the cable down to the bottom of downspout and back up toward gutter, clamping it into downspout hanger to prevent cable from being damaged by drain/gutter edge. This also ensures that the cable tail is secured on the roof. Cable to be linked to roof loop (see diagrams).
Typical meMBRANE roof
Valley | Heater Cable | |
Power Connection | ||
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Roof Clips 
Downward Slope | Downward Slope |
Drain 
Typical metal roof (Separate cables shown for roof and gutter)
H | Roof Clip | Weatherproof | ||
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| outlet box | |
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| (by installer) | |
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| Drip Loop (Typ.) | ||
| Heater Cable | |||
| Roof Clips | |||
| (@24" (60.96 cm)O.C.) | |||
Clip gutter cable to roof 
cable to provide a path for
water to get to ground
End Seal
Must not be submerged nor allowed to be at the bottom end of a down- spout.
DSH
Hanger Clamp
End Circuit | Mid Circuit |
Downspout | Downspout |
Installation | Installation |
Table 1 Determination of total cable requirements
Model # | # of Cables |
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Roof Edge | From Table 2 based on eave overhang |
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Gutter | 1' (30.48 cm) of cable/foot of gutter (if gutter is |
| wider than 6"(15.24cm), use 2 traces) |
Downspout | 2' (60.96 cm) of cable/foot of |
| is looped down and back |
Roof Valley | 6' (1.83m) of cable/valley - loop 3' (0.91m) up |
| valley and back |
Dormer | 1' (30.48 cm) of cable/foot of dormer perimeter |
Perimeter |
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Table 2 Cable length factors vs. eave overhang
Eave | Loop | Length Factor | Length Factor |
Overhang E | Height H | Shingle Roof * | Metal Roof ** |
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12"(30.48 cm) | 18"(45.72 cm) | 1.9 | 2.5 |
24"(60.96 cm) | 30"(76.20 cm) | 2.7 | 3.5 |
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36"(0.91 m) | 42"(1.07 m) | 3.6 | 4.5 |
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48"(1.22 m) | 54"(1.37 m) | 4.6 | 5.5 |
Cable length required = Length Factor × Roof Length (feet/m)
Notes:
*Typical shingle roof with sawtooth pattern. (See diagram) ** Typical metal roof with loop pattern spaced 24" (61 cm) - for other spacing these factors will need to be adjusted accordingly. (See diagram)
For other designs, contact EasyHeat.
Typical Shingle Roof (Single cable shown for roof and gutter)
24"
“H” loop height | overhang |
“E” overhang distance from roof edge to face of wall
Weatherproof Outlet
Box (by installer)
Drip Loop
Heater Cable 
www.easyheat.com