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Home Roof Ice Damming

Roof Ice Damming

Here are causes:

• Poor or non existent vapour barrier which allows heat to escape into the attic.
• Air leakage through light fixtures, plumbing stacks, attic access hatches and fan vents etc.
• Insufficient attic insulation allowing warm air into the attic and melting the snow.
• Inadequate attic ventilation.
• Bright sunshine melting the snow;
• Naturally occurring ice accumulation due to various weather conditions.
How to avoid ice dams:
• Eliminate or reduce air leakage into the attic by installing a vapour barrier or sealing air leaks
• Improve attic insulation keeping the attic space cool, thereby reducing the amount of melting snow
• Lower the humidity level in the living space

Posted Wednesday Dec 28