Ice Dams Cause Mold in NY, NJ Westchester, Bergen Rockland 866 543-3257

Ice Dams Cause Mold in NY, NJ Westchester, Bergen Rockland


Ice Dams Cause Mold in NY, NJ Westchester, Bergen Rockland; Ice dams result from the escape of heat and humidity into the attic which eventually builds up and melts snow on the roof. The ice dam is the ridge of ice that forms at the edge of a roof which prevents melting snow from draining as it should. The water that backs up behind the ice dam can leak into the home through the roof and cause damage to walls, floors, ceilings, insulation, and other areas. Ice Dams Cause Mold in NY, NJ Westchester, Bergen Rockland.

Pictured below is an image of how an ice dam happens and how it can cause problems.

WHY DO Ice Dams Cause Mold in NY, NJ Westchester, Bergen Rockland?

Ice Dams Cause Mold in NY, NJ Westchester, Bergen Rockland

Ice Dam

The key problem caused by ice dams is the water and moisture that leaks into the home. Mold thrives on moisture and grows because it feeds on the materials that most homes are made of: wood, drywall, wallpaper, carpet, ceiling tiles, etc. As long as these ingredients are present, mold will form and continue to grow as long as it has food to feed on. This is the reason that the structural integrity of a home is compromised–mold is essentially feeding on the home.

As mentioned earlier, ice dams are caused by heat escaping into the attic. Temperature, as you know, is one of the key ingredients required for mold growth. Heat in the attic, which leads to ice dams, is caused by everyday activities in the household, such as cooking, laundry, showering, washing dishes, etc. Normally, these activities should not cause problems. However, problems will occur if the attic is not properly insulated. One of the major causes of condensation in the attic is the lack of proper ventilation in the kitchen and bathroom required to vent vapor out of the home. Another major reason excess heat may build up in the attic is a direct result of builder negligence th    at vent bathroom and dryer vents into attics, crawl spaces, or over hangs, and not onto the roof. This poor building practice will cause problems because moisture and heat will build up in the attic. The Ice Dam Company provides an excellent visual of why black mold begins forming in an attic…click here to view.

Here are some general tips to prevent ice dams.

1. Make sure you have proper ventilation in the attic. Keep your soffit vent clear and open. Have a roofing professional check your roof and calculate the proper ventilation requirements. A well ventilated cold roof prevents ice dams.

2. If you have gutters on the house – keep them clean and free from leaf debris.

3. Ensure that your bathroom exhaust is vented through the roof and insulated if necessary.

4. Ductwork in the attic should be well insulated and sealed from leaks.

5. Air bypass – where warm air leaks through small cracks and openings – should be sealed. Check attic access ports in closets and can lights in the ceiling as potential areas of concern.


In addition to the visual external clues of ice dams, here are some tips to help you determine if you have condensation issues.


  1.        Check your attic for visual mold.
  2.        Check your attic for signs of frost (early morning is best)
  3.        Check all penetrations in your ceilings such as light fixtures and make sure there is no excessive gaps between the fixtures and ceiling.
  4.        Make certain all drywall is finished properly with no gaps or cracks for moisture to migrate through.
  5.        Look for visible stains such as mold on the surfaces of the ceiling, walls of the living areas, floors, carpets, attic plywood sheathing, attic sidewalls, floor joist, wet insulation.
  6.        Check for moisture or high relative humidity over 65% and higher.
  7.        Smelling unusual musty or moldy odors is an indication that you may have a problem. High relative humidity or moisture may be the culprit.


If you are still concerned, consider hiring a professional mold inspector, indoor air quality professional, and/or a professional that use moisture meters or thermography equipment to identify potential moisture issues that may lead to mold.

2017-11-26T19:56:48+00:00 January 30th, 2013|Blog|
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