What Causes Ice Dams and How Can You Prevent Them?

2/15/2021 (Permalink)

Ice dams– literal dams made of ice – usually form at the eaves and gutters and prevent snow/ice from melting and leaving the roof. 

Primary cause is a Temperature Imbalance in the Attic: 

Poor attic insulation– Insufficient or deteriorated attic insulation can allow warm air to move from the heated areas of the house to the attic space. 

Lack of proper attic ventilation – Properly balanced attic ventilation helps slow snow melting by allowing cold air to enter the attic space, in turn driving out the warmer air.  This reduction in warm attic air helps decrease the chance of snow melting on the roof. 

 
Problems Caused by Dams 
Because the water from melting snow cannot drain from the surface of the roof, water may leak into the home. These leaks can cause several problems: 

• Damage to ceilings, walls, insulation, and other surfaces 
• Mold and mildew growth 
• Roof damage 

The first step to repairing damage from a dam that forms after a winter storm  

Dry out walls, ceiling and other interior surfaces affected by leaks.  

SERVPRO Of Greensburg,can assist you with this process. Your homeowners' policy may include ice dam coverage that will compensate you for the cost of repairs. 

 
Here are 3 steps you can take to prevent ice damming: 

Remove snow from the roof  

Ventilate attic 

Insulate attic