Installation and Operation Instructions
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Table 4. Multiplier
Eave depth (overhang),
inches
Tracing height, inches Multiplier
Less than 12 18 2.0
12 18 2.8
24 30 3.8
36 42 4.8
48 54 5.8
Step 2. Use the calculated cable length determined above to select the correct
RoofMate cable size. If the length you need is between sizes, choose the longer
size cable.
If icing occurs on areas of the roof that are at a considerable distance from each
other, you can use a separate cable for each roof area. In addition, if the roof
area is large, then separate cables for the roof and gutter should be used.
В. For Installation in a Gutter and Drain Only
If icing occurs only in gutters and drainage pipes, measure the required sizes
(see Fig.2) and calculate the cable length required for each area, as indicated
in Table 5.
To determine the total cable length, add the lengths required for each cable.
Table 5. Cable Length Calculation for Gutters and Drainage Pipes
Place Calculation method
Gutter Gutter Length (B) Gutter Length × 2
Drainage pipe Pipe Length (E)
Number of drainage pipes × length of
drainage pipes × 2
Step 2. Use the calculated cable length obtained above to select the correct
RoofMate cable length needed. If the length you need is between sizes, choose
the longer size cable.
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