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Found 5 results for the keyword(s) ‘Icicles’

  • Article

    OVERVIEW: Roof Ice Dams & Icicles

    "Why do some houses have ice dams on the roof and others do not?" The overview is below -- for details go to Ice Dams. Ice dams develop when snow is on the roof, outdoor temperatures are only slightly below freezing, and there is spot or generalized heat loss from the house into the attic/roof...
  • Article

    Shields for Rain Gutters

    One of the most successful, but most expensive ways to keep leaves out of rain gutters is to place a solid shield over the top.  Using the principle of surface tension of water, the water flows over the shield and wraps around its outside curve.  That curve extends out over the rain gutter itsel...
  • Article

    Pot lights: fire hazards and ice dams

    John in Kleinburg, Ontario asked if he should remove insulation from around his pot lights. Actually it is necessary to take the question much further.   HEAT FROM TRADITIONAL POT LIGHTS Pot lights, or recessed lighting fixtures as they are properly called, do create a lot of heat and it is tr...
  • Article

    Making an X-Ray of your roof

    When there is morning frost or light snow on a roof, you can learn a lot about a heat losses from the house and how to eliminate ice dams and icicles.    What causes problems  Melting the bottom of a snow pack or melting off all snow at the crown of the roof sends water down under the snow to ...
  • Article


    Recent research from Canada Mortgage and Housing Corporation has pointed out new priorities for solving ice dam problems. Common practice for years has been to address ice dams with more ventilation. It was when this practice wasn?t working very well that the researchers took a closer look a...