Snow DamageAs snow falls, it accumulates on any surface that is or becomes cold enough to keep it from melting immediately, such as a roof or street. When snow accumulates on a roof, the heat from within the building typically melts the bottom portion, while cold from the outdoors and the snow above causes it to re-freeze.
The water beneath seeps into the cracks and crevices of the roof filling them with water, which expands when it freezes again, spreading the materials the roof is made from and creating gaps in the seal of the roof that keeps the building dry.
When those gaps become large enough, the roof will begin to leak, causing large amounts of water damage within the buildings structural interior which will require extensive repairs. If the damage is not addressed immediately, it can spread, causing a lot of damage to the structural integrity of the building.