The answer to 'roof decking ice dam' is that ice dams on the roof can cause damage to the roof decking. Ice dams form when snow on the roof melts, usually due to heat escaping from the home, and then refreezes at the roof's edge. This creates a barrier that prevents proper drainage, leading to water buildup and potential leaks into the home.
Some common causes of ice dams include poor attic insulation, inadequate ventilation, and heat loss through the roof. Symptoms can include icicles forming along the roof's edge, water stains on interior walls, and damage to the roof decking. Solutions may involve improving insulation, adding ventilation, or removing the ice dam itself, but in some cases, it's best to call a professional roofing contractor to assess and address the issue.