19
3
Heating Cable Installation
Raychem-IM-H58067-IceStopRoofGutterDeIcingCOM-EN 18/01
TABlE 5: ICESTOP HEATING CABlE lENGTH FOR SlOPED
ROOF – STANDING SEAM
Eave
overhang
distance
Standing
seam
spacing
Tracing
height
Feet of
heating
cable per
foot of
roof edge
Meters of
heating
cable per
meter of
roof edge
12" (30 cm) 18" (45 cm) 24" (60 cm) 2.8 ft
2.8 m
24" (60 cm) 18" (45 cm) 36" (90 cm) 3.6 ft
3.6 m
36" (90 cm) 18" (45 cm) 48" (120 cm) 4.3 ft
4.3 m
12" (30 cm) 24" (60 cm) 24" (60 cm) 2.4 ft
2.4 m
24" (60 cm) 24" (60 cm) 36" (90 cm) 2.9 ft
2.9 m
36" (90 cm) 24" (60 cm) 48" (120 cm) 3.6 ft
3.6 m
• On standard systems, the length of heating cable
needed for the roof and gutter can be determined
by the formula:
Heating cable length = [2 x no. of seams traced x
(trace distance from roof edge to gutter bot-
tom)] + distance along the gutter/roof edge
Additional heating cable will be needed for connec-
tion kits and downspouts.
Important: Attachment methods are not shown
in Figure 5. For attachment methods, proceed to
“Attachment Methods,” page 29.
other
considerations
• Use a snow fence or snow guards (not shown) to
prevent snow from sliding. Extend heating cable
above the snow fence at least 6 inches (15 cm).
• If the roofing materials continue down the fascia,
contact your local Thermal Management repre-
sentative or Thermal Management directly for
design assistance.
• If there are no gutters, refer to "Heated Drip
Edges" on page 37, for information on how to
install heating cable for this application.
• It is not always necessary to run heating cables on
the roof. If you do not experience ice dams on the
roof or roof damage, installing heating cables only
in the gutters and downspouts may be sufficient.