Roof assemblies - renovation
What causes ice dams and how to fix them
...ice is called an ice dam, and it can cause water to backup beneath shingles and Ice dams cause damage to walls and roof structures.
How to know if you have an Ice dam problem
If you look up and see a big chunk of ice on the bottom edge of your roof, your forensic work is done; "congratulations," you have an ice dam. D...