HOW ICE DAMS FORM?

Ice dams form when roof ice melts and reforms on the eaves and valleys of your roof. 

Why does this happen?

Heat escapes from the attic and intersects with the cold outside air. As a result, snow resting up against your roof begins to melt but quickly refreezes. This process happens repetitively until a significant layer of ice builds up along the roofline, inhibiting the gutters from carrying water away from the house.

Over time, this water can creep up under the shingles. In addition, water can penetrate the building’s envelope and cause interior water damage if the home has a compromised moisture barrier.

RISK OF ICE DAMS

Ice dams force water from melting ice and snow upwards penetrating the vulnerable materials below. As water seeps into the home it eventually reaches your attic, ceilings, walls, and foundation leading to:

• Wood rot on your roof decking, rafters, wall framing and sheathing

• Mold growth from dampness

• Damage to gutters, siding, roofing, shingles, etc. from icicles

• Risk of injury due to falling ice and icicles to people below

• Risk of damage to property and vehicles due to falling ice and icicles

• Permanent damage to insulation

• Interior damage including peeling and blistering wall and trim surfaces, carpeting and wood floors, furniture, lighting, electrical, and more.