dam / Green Building & Sustainable Home Renovation Information & Advice

...Dams or Ice Damming, and the surprising thing is that it's very unlikely that the roof covering itself is the problem. Frost and ice forms in attics when warm, humid air accumulates and condenses on the underside of your roof sheathing. Depending on the temperature, and the insolation (ie. can sun get to the roof) you ...

...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. Despite the romantic i...