How far from the edge of eaves must ice dam protection extend?

Ice dam protection must extend a minimum of 24 inches from the edge of the eaves to effectively prevent the buildup of ice and subsequent water intrusion under roofing materials. This requirement is rooted in building codes that focus on minimizing the risk of ice dams, which often form due to heat loss from the interior of a building that causes snow to melt on the roof and then refreeze at the eaves where it is colder. By extending the protection 24 inches beyond the edge of the eaves, contractors create a barrier that helps to keep the roofing area colder and thus reduces the chance of melting and refreezing, ultimately protecting the building’s structure from potential water damage.

This requirement is established to ensure the longevity and performance of the roof system, keeping it intact and functional during winter conditions, which is particularly relevant in regions that experience significant snowfall and freezing temperatures. Proper adherence to this code not only enhances the effectiveness of the roofing system but also aligns with the safety standards for residential construction.