Instruction Manual

7
Roofline To maintain a continuous path on the roof for water run-off, route
the heating cable in a “zigzag” fashion as shown.
The cable must extend above the overhang into the section of the
roof above the heated section of the house. Also, to make a
continuous path for the water, extend the heating cable all the way
down to the gutter.
Overhang
distance
(in/cm)
Tracing
Width
(in/cm)
Tracing
Height
(in/cm)
With
gutter
Multiplier
(A)
Without
gutter
Multiplier
(A)
No overhang
15/38 22/56 3.9
3
12/30 15/38 22/56 3.9
3
24/61 15/38 33/84 5.3
4.5
36/91 15/38 44/112 6.8
6
48/122 15/38 55/140 8.2
7.4
60/152 15/38 66/168 9.7
8.9
72/183 15/38 77/196 11.1
10.3
(B): Total length of roof edge
Cable Length required for roofline area: Multiply (A) and (B) to
determine the length of heating cable required for roofing.
A drip loop extends at least 6 cm (2.5in) from the roof edge to direct water into the
gutter or to the ground.
Caution: There should be a minimum of 5 cm (2in) between the bottom of the drip
loop and the bottom of the gutter.
Tops of triangles
Bottoms of triangles
(With gutter)
Bottoms of triangles
(Without gutter)