Scott Hurm from Crest Exteriors has been presenting all month long at chapter meetings on the ice dams. While winter has been a bit forgiving in the ice and snow department this year so far, there are some HOAs in the metro reporting ice dam trouble, and there’s plenty of winter yet to wreak even more havoc on roofs.
As Scott has explained to our chapters, such frozen barriers form along the edges of roofs, posing a significant risk to homes if not addressed. Understanding how ice dams develop, the damage they can cause, and how to prevent them is essential for homeowners and HOA properties.
How Ice Dams Form
Ice dams occur when a combination of snow, heat, and cold temperatures interacts on a roof. It starts with snow accumulating on the roof. Heat escaping from the home—often due to poor insulation or ventilation—warms the roof’s surface, melting the snow. This melted water trickles down toward the eaves, where colder temperatures cause it to refreeze. Over time, this ice builds up, creating a dam. As more snow melts behind the dam, water pools, unable to drain off the roof. Minnesota’s harsh winters, with frequent freeze-thaw cycles, make it a prime location for this process.
Damage Caused by Ice Dams
The pooled water behind the dam can seep under shingles, infiltrating the roof deck and interior walls. This leads to water damage, including stained ceilings, warped drywall, and mold growth. In severe cases, the weight of the ice and water can strain the roof structure, while ice buildup along gutters may pull them loose. For Minnesota homeowners, the repair costs can climb into the thousands, especially if damage goes unnoticed until spring.
Preventing Ice Dams
Preventing ice dams starts with proactive measures. First, ensure proper attic insulation to minimize heat loss. Sealing air leaks around pipes, vents, and light fixtures helps too. Next, improve attic ventilation with soffit and ridge vents to keep the roof uniformly cold. Before winter, clear gutters of debris to allow meltwater to flow freely. If ice dams begin forming, safely remove snow from the roof with a roof rake, avoiding the use of salt or sharp tools that could damage shingles. For persistent issues, consider installing heat cables along the eaves.
Minnesota winters are unforgiving, but with vigilance and preparation, homeowners can protect their roofs from the costly consequences of ice dams. Thanks to Scott for all of his insights (and you can watch him live at our last chapter meeting this Tuesday, Feb 25 at Maple Grove Community Center!)
