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Found 49 results for the keyword(s) ‘Ice Dams’

  • Article

    I have ice dams over a bay window.

    Sol, from Sudbury, Ontario, has terrible ice dams, as you can see in the photo. They are directly over his bay window. Take a good look at the house design. The bay window comes right out to the edge of the roof, preventing any possibility of any ventilation up over this area. In addition, be...
  • Article

    The roof on the new house still leaks -- is it the codes fault?

    Sheila writes from Ottawa : Hi there. I will try to make this as easy as I can however, it may not be.I purchased a brand new home from a very reputable builder in 1999 and took possession in December of that same year. December led into January and towards the end of January I began to experienc...
  • Article

    How to melt ice on the roof.

    One viewer has recommended using Urea fertilizer to melt ice on the roof rather than using salt-based de-icers.Actually, the research done, during the famous 1998 Eastern ice storm, confirms this idea. The salt will discolour the shingles and rust the gutters and generally not be good for eith...
  • Article

    Eleminating ice dams

    Nancy in Manitoba has bad ice dams on her roof. She sent me a great sketch of her whole attic arrangement, complete with knee walls and cathedral ceilings, not to mention a dormer -- and there is no ventilation in the roof in front of the dormer.The guidelines for eliminating ice dams are sim...
  • 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...
  • Article

    Heating Ducts in the Attic & Ice on the roof!

    Ray from Woodstock, Ontario writes:For 20 years we had no ice problems on the roof. Heating was radiant heating in the ceiling. Then we installed a forced air furnace. The contractor ran all the ducts through the attic and we have had terrible ice dams ever since. The contractor refused to...
  • Article

    Overview: Attic Moisture

    Ventilation in a Canadian attic does very little to remove moisture when the temperature in the attic is below freezing. During that time, the moisture is in the form of Ice and the passing air simply won't remove it -- whether you have passive vents or power vents. When things warm up, if the ...
  • Article


      This is one of those problems that are not dealt with seriously enough by the building officials in really cold regions.  I have opened a blog space at the bottom of this article for you to add in your case history so we can demonstrate that this is a large and continuing problem.  Take a look...
  • Article

    Overview - Condensation on the house side of thermal windows

    Richard writes in:   Hi, I could not find this second level question on your web site. I am familiar with the humidity levels required in a home to avoid condensation on the inside on a thermal pane window- we are still getting condensation with readings in the center of the room of 20 degree C ...
  • Article

    Speciality gate / door latches

    Have you ever tried to run a string up from the gate latch, through the post and then put a ring or something on the outside. Of course it gets stuck in the wood or breaks, requiring you to either go through the house with your muddy boots, or over the fence. So finally (2014) one of those inven...