Electric cable heating of roof drains

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SUMMARY

The discussion centers on the use of electric cable heating, specifically heat tape and heater cords, for roof drains in cold climates. It is established that these heating solutions are effective when outside temperatures fluctuate between freezing and thawing, or when significant heat loss from the roof leads to melting below freezing. Participants confirm that heat wires in gutters prevent icicle formation and that heat tape is beneficial for maintaining clear roof drains in older buildings, despite occasional maintenance requirements.

PREREQUISITES
  • Understanding of electric cable heating systems
  • Knowledge of heat tape and heater cord applications
  • Familiarity with thermal dynamics in roofing
  • Experience with building maintenance in cold climates
NEXT STEPS
  • Research the installation techniques for electric cable heating in roof drains
  • Explore the effectiveness of different heat tape brands and specifications
  • Learn about thermal insulation methods to reduce heat loss in buildings
  • Investigate maintenance best practices for roof drainage systems in winter
USEFUL FOR

Contractors, building maintenance professionals, and anyone involved in managing roofing systems in cold environments will benefit from this discussion.

TSN79
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I work for a contractor and we're currently discussing drains on the roof of a building, and whether they should have electric cable heating around them. It gets cold here and snow does accumulate on the roof. Under what circumstances should cables be used and not? Pros / cons?
 
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To my knowledge, the use of heat tape or heater cords is used when the outside temp fluctuates between freeze and thaw within the day or if you have sufficient heat loss through the roof to present melting below freezing temperatures.

I have heat wires run in my second story gutter because of icicle formation during the winter. They have been the best option so far. At my place of business, we use heat tape on a lot of roof drains because the heat loss through these old buildings is pretty bad. They definitely help keep them clear, although sometime the maintainence guys have to go up on the roof and clear them out.
 

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