I have a client with a roof valley that has ice damming problems ever year due to poor design and snow drifts off higher roofs. The valley end into a wall section . Other than installing de-icing cables does anyone have a suggestions
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Cables or snow removal are the lowest cost as you most likely know. Redesigning and rebuilding the home properly is the high cost solution.
In between is changing the roof to a waterproof set up of your choice, such as ice and water shield under the entire area that is involved and continuing it up the affected sidewalls to higher than the problem.
They could always sell too and buy a better constructed home from you.
The valley dead-ends into a wall?
Can you supply a picture of this roof?