When you think about roofing, ventilation may not be one of the first things that comes to mind, however proper ventilation is essential to prolonging the life of your roof.

  1. It lessens the heat brought into your home during warm months and lowers energy bills. The sun’s rays penetrate your roof and radiate into your attic. If you do not properly ventilate, this heat will travel to  your living space affecting comfortability and raising electricity bills as air conditioners etc. are utilized more to cool your home.
  2. Efficient ventilation helps to reduce moisture and condensation in the winter months. Heated air from inside the home escapes into the attic through even the smallest of openings in your walls or ceilings. This moisture can condense if you have not properly ventilated the attic space, leading to dampened insulation resulting in rot, mold, mildew and inadequate indoor air quality.
  3. Ice dams, formed in winter when heated air from your home travels to the unheated attic, can be averted through proper ventilation. Ice dams create warm areas on your roof and accumulated snow melts unevenly, flowing until it reaches a colder spot, like your eaves, where it then refreezes. Ice dams are caused directly from energy loss within the home and can lead to rotted roofs and rafters, insulation damage and moisture in walls.
  4. Ventilation extends the life of your roof. Building materials will last longer if you reduce the surface temperatures of the shingles and ensure minimal moisture buildup.

To achieve effective ventilation a system is needed that provides continual airflow on the underside of the roof. A balanced system of intake ventilation at the lower portion of the roof or in the eaves as well as exhaust ventilation at the top of the roof is necessary. Make sure cool air from the lowest point on your roof is being pulled into your home from exhaust vents in order to rid hot, moist air from the underside of the deck.

To ensure proper ventilation there are a few important things to avoid:

  1. Don’t have two differing types of exhaust vents on the same roof as an attic. This can lead to short circuiting.
  2. Make sure insulation is not covering intake vents.
  3. Ensure vents have not been painted shut restricting airflow.
  4. Check that exhaust fans in bathrooms, laundry rooms and kitchens vent to the exterior of your home and not up into the attic space.

If you are looking at ventilating or insulating your attic space, call the professionals at Keating Contracting today at 905-270-4100. We will help you achieve an energy efficient, balanced ventilation system so you can get the longest life possible out of your roof.

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