In the winter, hanging icicles and chunks of ice on the roof are inevitable. Thankfully, they pose no real harm while frozen. That is unless they overload the roof with weight or fall onto your walkway. Nevertheless, what you should worry most about is ice melting and pooling on the roof.
Ice can melt in the middle of winter when the temperature of the roof gets too warm. Since the edges are often coolest, the ice there doesn’t melt at the same rate. Consequently, it blocks any flowing water from above. The flatter the pitch, the easier it will be to prevent water from running.
Once dammed, water seeps below the shingles, causing one of two problems:
If frozen underneath the shingles, they will pop up or crack, leading to even bigger leaking problems come spring. Thus, it’s best to prepare for dams early and watch for signs of damming all winter long.
Roofs warm up when too much heat escapes through the attic. Therefore, to prevent ice dams, you need to improve two things:
For more information on how to improve the insulation or ventilation of your roof, speak with a professional contractor. He or she can assess your roof before winter and recommend courses of action to prevent ice damming.