How Does Ice Dam Formation Lead to Roof Water Damage?

Ice dams start when snow on your roof melts unevenly. Warm air escaping from your attic heats the upper part of the roof, melting snow there. The water runs down to the eaves, where the roof surface is colder because it extends past the heated attic. That water refreezes, forming a ridge of ice at the edge.

As more snow melts, the ice ridge grows taller and wider. It acts like a dam on a river, holding back the meltwater behind it. This pooled water has nowhere to go except up under the shingles. Once under the shingles, it can soak into the roof decking and drip into your attic or living spaces.

Look for water stains on ceilings or walls, especially near exterior walls or under the eaves. You might also see peeling paint, warped drywall, or damp insulation in your attic. In severe cases, water can drip from light fixtures or vents, which is a safety hazard.

Another sign is icicles hanging from the eaves. While they look pretty, they often indicate that melting and refreezing is happening. If you see icicles, check your attic for dampness or staining. Catching the problem early can prevent more extensive repairs.

If you find water inside, turn off the electricity in the affected area and avoid touching water near outlets. See a doctor if you feel unwell from any mold exposure.

• Water stains on ceilings or walls
• Peeling paint or bubbling drywall
• Damp attic insulation
• Icicles on the eaves
• Dripping from light fixtures
• Musty odors indoors

If water has already entered your home, start by drying the area as much as you can. Move furniture away from wet walls, place buckets under leaks, and run fans or a dehumidifier. Remove wet carpet or insulation if possible, as they can harbor mold.

Document the damage with photos and notes for your insurance claim. Policies vary, and your insurer decides what is covered. Check your policy to understand what you need to file. Then contact local water damage pros to assess the extent and begin the cleanup.

The pros can help with water extraction, drying, and repairs. They can also inspect for hidden moisture and recommend steps to prevent future issues. Acting quickly can reduce the risk of mold and structural decay.

• Dry wet areas with fans and dehumidifiers
• Move furniture and belongings away from water
• Remove soaked carpet or insulation
• Take photos for documentation
• Check your insurance policy for coverage
• Contact pros for a thorough assessment