Insurance & Storm Damage · FAQ

Do roof heat cables actually prevent ice dams?

They mitigate, not prevent. Heat cables installed in a zigzag pattern along the eaves keep a narrow channel of melt-water flowing through any dam that forms, which prevents the most catastrophic backups. They don’t stop the dam from forming and they don’t address the root cause (attic heat loss).

Trill installs heat cables for homeowners who want belt-and-suspenders protection on tricky eave geometries (deep valleys, complex hip junctions) where ice and water shield alone isn’t enough. Annual operating cost runs $80 to $150 depending on cable length and frequency of cold snaps. They reliably reduce interior damage from dams but don’t justify ignoring the underlying ventilation problem that creates the dam in the first place.