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sealing on inside of damp course ??

Discussion in 'Repairs & Maintenance' started by See Change, 17th Jan, 2016.

  1. See Change

    See Change Timing Lord Premium Member

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    On one side , at the back of the garage of our PPOR is a visible damp course .

    The outside of the wall is probably 1/2 - 1 m under ground . It's not practical to excavate down to the damp course .

    When we have a prolonged period ( several days ) of heavy rain there is a seepage at the level of the damp course into the garage .

    We've had a Drainage channel , filled with blue metal connected to the stormwater system dug , but a small amount of water still came though .

    Is it practical to use a sealant to treat this in anyway to prevent the leakage .

    Any other suggestions ?

    Cliff

    garage back wall.JPG
     
  2. SeafordSunshine

    SeafordSunshine Well-Known Member

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    In London basement apartments, they do a process called 'tanking'
    I'm pretty sure its horrendously exy!
    Cheers
     
    Last edited: 17th Jan, 2016
  3. Scott No Mates

    Scott No Mates Well-Known Member

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    Assuming thi is double brick.

    The dampcourse shouldn't be below ground level and should be exposed at all times. Are the weep holes covered too?
     
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  4. See Change

    See Change Timing Lord Premium Member

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    As I said , the damp course is below ground level . Weep holes …. ?

    Cliff
     
  5. Scott No Mates

    Scott No Mates Well-Known Member

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    [​IMG]

    Seech, the external wall is a wet wall exposed to the elephants. In a rain event, it gets saturated and water runs down the inside face of the cavity. The inside wall is a dry wall and doesn't get wet.

    Weepholes sit at the bottom of the flashing and direct the water out of the building. If the weepholes are blocked then water will build up and wet your internal wall etc.
     
  6. Tools

    Tools Active Member

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    What he said but if this is a single skin wall then google negative pressure tanking.

    Tools
     
  7. Scott No Mates

    Scott No Mates Well-Known Member

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    On the same page @Tools

    Very few decent ones around - membranes don't stick to 'wet' walls.

    My mind is blank but there is a good cement based application - Krystol (or something like that - used over 20 yrs ago).
     
  8. See Change

    See Change Timing Lord Premium Member

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  9. willair

    willair Well-Known Member Premium Member

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