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Damp fix - rendered to the ground

Discussion in 'Plastering and Rendering' started by smollions, 19 Jul 2020.

  1. smollions

    smollions

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    So I had a damp company come and rerender the walls with salt inhibitor mortar sort of stuff (not entirely sure on the proper term) but they rendered straight to the ground. Wouldn't this breach the dpc?
     

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  3. bennymultifinish

    bennymultifinish

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  4. smollions

    smollions

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    Care to elaborate...? I always see plasterers only rendering to around the dpc mark.
     
  5. bennymultifinish

    bennymultifinish

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    where’s the dpc? if it was any good you wouldn’t have needed the ‘damp firm’ in the first place.
     
  6. smollions

    smollions

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    DPC was injected before the replastering. Injected into first mortar joint at the lowest point... So I guess around there. Covered by the rendering that they did, hence me asking the question...
     
    Last edited: 19 Jul 2020
  7. Alastairreid

    Alastairreid

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    Did they inject above the floor joists?
     
  8. smollions

    smollions

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    It's a concrete floor. Not entirely sure where the height of the joists used to be before the previous owners filled in the floor.
     
  9. bennymultifinish

    bennymultifinish

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    how far above the wood floor that we can see did they inject?
     
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  11. smollions

    smollions

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    Its about a bricks height where it was injected. The flooring is actually a fake wood look vinyl bullshit that was already laid when we moved in.
     
  12. bennymultifinish

    bennymultifinish

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    you could argue they shouldnt have cemented over that course.
    theres most likely water proofer in the cement....plus how would you account for the 3-4” when fitting your skirting.
     
  13. bennymultifinish

    bennymultifinish

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    it’s particularly rough by the way. the cement work I mean.
     
  14. smollions

    smollions

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    Possible has some waterproofer, the main thing he mentioned was the salt inhibitor used. I'll raise the concern about cementing over the course with him,

    Yeh the work is a bit rough I thought too but the main worry for me is any issues with bridging being my main concern.
     
  15. ted456

    ted456

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    You never bridge a DPC inside the building or outside.
    Cut away the render to expose the injected bed and break the bridging to the floor.
    Was the old plaster hacked off ack to bricks?
    theres no flopped up membrane edge from below the solid floor. so displaced damp could be coming up from below the solid floor?
    as above, thats a rough render. Thr render is still damp (do this company work on sundays?) and its not been ruled off and rubbed up.
    maybe you know You'll have to use a remedial skim.
    top left there looks like a scrap of gypsum. do you have a pic of the whole wall?

    is that a solid or cavity wall? is the outside ground level well below the solid floor?

    unless you find and fix the cause of any damp then you could be wasting your time.
     
    Last edited: 20 Jul 2020
  16. smollions

    smollions

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    Yeh old plaster was backed up to 1.5 metres up because we had experienced some wet rot. Was plastered on Friday afternoon, rained a lot on saturday and I think they said they were skimming sometime soon.

    Here's a whole wall photo. The ground level isn't only slightly higher than the outside.

    Edit: so the guy said it goes to the ground because it's a barrier mortar being used as the undercoat... Whatever that is. Apparently to stop moisture from seeping or something... Maybe a form of tanking?
     

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    Last edited: 20 Jul 2020
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