The answer to 'underlayment ice dam' is that an underlayment ice dam is a buildup of ice that forms between the roof and the underlayment, preventing proper drainage. This can lead to water damage, leaks, and other roofing issues. Common causes include inadequate insulation, poor ventilation, and heavy snowfall. Symptoms include water stains, mold growth, and ice dams visible on the roof.
The best solution is to address the root cause by improving insulation, ventilation, and roof drainage. This may require professional roofers to assess the problem and make necessary repairs or modifications. In some cases, homeowners can try DIY solutions like removing snow, installing heat cables, or adding roof vents, but more complex issues should be handled by experienced roofers to ensure the problem is resolved safely and effectively.