Installation Manual

Skylight Pattern:
Use the same triangle pattern as for the roof edge, but extend the triangle height to the base of the
skylight (Figure 3). If the triangle height is to exceed 20', commercial grade de-icing cable should be
used; contact Danfoss Technical Support toll-free at 866 676 8062.
Table 3 - Triangle Heights
Overhang “O”
Triangle Height “H” (Standard Shingle Row)
<12” (30.5cm)
3
30-36” (76.2cm- 91.4cm)
7
12-18” (30.5cm - 45.7cm)
4
18-24” (45.7cm- 61cm)
5
24-30” (61cm- 76.2cm)
6
36-42” (91.4cm-106.7cm)
8
42-48” (106.7cm-121.9cm)
9
48-54” (121.9cm-137.2cm)
10
54-60” (137.2cm-152.4cm)
11
60-66” (152.4cm-167.6cm)
12
66-72” (167.6cm-182.9cm)
13
*Based upon standard shingle row height of 5 ½” (14cm)
The spacing at the base and top of each triangle should be 15”, point-to-point (Figure 2). Triangle
heights must not exceed 20' and should be at least one shingle row above where the warm zone of
the roof begins. A warm zone is present when snow and ice melt due to poor insulation or
ventilation
Roofline Pattern:
A triangular pattern is used on the edge of the roof (Figure 2). The height of each triangle is
dependant on the size of the roof overhang. Refer to Table 3 for triangle heights.
Figure 2. Roofline Pattern
Figure 3. Skyline Pattern
15” Triangle Base
Triangle Height
15”
Triangle Base
6
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Copyright 2009 Danfoss Inc.
088L3371- 07/2009