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Found 8 results for the keyword(s) ‘Frost Heaving’

  • Article

    Supporting outdoor structures

    In this 2004 HGTV episode, we collected several different viewer questions about supporting outdoor structures so we could compare one to the other.  At the bottom of this article I have added, in 2015, the Helix screw piles that may just have replaced all the rest. Elephant Feet The first vi...
  • Article

    Deck Span Tables

    Decks need to be built strong enough to not fall down or have deck boards break for lack of support. In addition, although they do not need to be as solid as a floor in the house, they should not bounce like a trampoline. The structures of most decks in Canada are built with pressure treated wood...
  • Article

    Retaining Walls and Frost

    Hi Jon,  I have a driveway retaining wall that continues to be pushed by the ground, even though it is backed by gravel and drained to "nothing under the driveway" except crushed gravel. I realize proper drainage affects this somewhat, however would prefer not to cut open my driveway, sidewalk a...
  • Article

    Frost Protected Shallow Foundations -- and water pipes

    Frost Protected Shallow Foundations The foundation for a house is generally poured below the soil grade level so that the footing itself is well below the frost depth for any given region and soil type.  This protects the house from frost heaving caused by expanding soils beneath the foundation....
  • Article

    Skirts on Mobile Homes & Frost Heaving

    Bruce from Thunder Bay writes: I own a mobile home that is 12' x 64' and I have to replace the skirting around the base and which product is best to use. You always talk about regular homes but not mobile homes and we need help too. In the area that I live in there is a very high water table and...
  • Article

    Fence Post Specifications

    The depth of the fence posts into the ground must be at least one foot below the frost level for your region. As well, one third of the total length of the post should be in the ground. This means that in mild regions the posts will be well below frost simply because of their length. In regions w...
  • Article


    There are two basic mechanisms which can cause a basement to move because of freezing temperatures -- ice-block formation and ad-freezing.Frost heaving: a form of ice-block formation occurs when moist soil lies under the foundation footings and the frost line or freezing-point penetration reac...
  • Article


    Isolating parts of the house located underground from the heat of the house can cause freezing and shifting under certain conditions. Wing walls, carport posts, and the like are common frost heaving or ad-freezing candidates because these structural parts of the house are far away from the heat ...