Redwood Trees and wall

Discussion in 'Gymnosperms (incl. Conifers)' started by L. Menendez, Sep 27, 2018.

  1. L. Menendez

    L. Menendez New Member

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    Antelope, CA
    There are several approx 28 year old redwood trees growing on county property within 5 feet of a sound wall that extends the length of that continuous sound wall . Over the last 9 years they have grown significantly and the sound wall is currently and progressively leaning proportionate to that growth. I can actually see the roots of the redwood trees coming through underneath the base of the sound wall. Is it within reason to believe that the Redwoods are causing the fence to lean. The county landscape architect is claiming that it's not possible.
    Last edited by a moderator: Sep 28, 2018
  2. Daniel Mosquin

    Daniel Mosquin Paragon of Plants UBC Botanical Garden Forums Administrator Forums Moderator 10 Years

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    Vancouver, British Columbia, Canada
    As I noted in an email: call a certified consulting arborist (use the Find an Arborist tool here: Welcome ) if there is any potential of litigation.
  3. Margot

    Margot Generous Contributor 10 Years

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    Nanoose Bay, BC Canada
    This is intriguing but please say what is a 'sound wall'.
  4. Michael F

    Michael F Paragon of Plants Forums Moderator 10 Years

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    Britain zone 8/9
    I was wondering too! Perhaps a wall to keep road noise out?
  5. wcutler

    wcutler Paragon of Plants Forums Moderator VCBF Cherry Scout 10 Years

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    Vancouver, BC Canada
    I think the term usually refers to a planting that will act as a sound barrier.
  6. thanrose

    thanrose Active Member 10 Years

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    Jacksonville, FL USA USDA Zone 9
    We use that term 'sound wall' down here to describe the solid barrier wall that separates a highway and multiple use land. Could be homes, parks, schools, white collar businesses.

    As to whether or not redwood trees could undermine such a structure would depend on soil type and elevation, and the manner of root growth of the trees. If they have buttressed roots at the base, then they definitely have an adverse impact. Menendez can see roots coming out from under which sounds like there are strong lateral roots as well as a deep tap root which I think redwood would need to counter the height above ground.

    Roots can have an effect in a few different ways. Water seeking through crevices in the wall, changing of the substrate by pushing out sand, or by pushing up hard. The wall could lean toward the trees, or away or both, or just have multiple stress fractures.

    Will the wall come down? And what would be the expected longevity of such a wall? In the Northeast megalopolis, there are thousands of such walls that have lasted forty to fifty years. I would think the county engineers expect at least twenty years for such a structure.

    With no experience with either those trees or that region, I'm pretty sure the county landscape architect is just protecting the county by denying any concern.
    JT1 likes this.

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