Finishing a wall that is prone to cracking

Discussion in 'Plastering and Rendering' started by padstar, 16 Nov 2021.

  1. padstar

    padstar

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    I have a wall that has a weak joint in it between brick and blockwork from the original construction. I believe this will be prone to continuous cracking. I am finishing the room and was planning on just skimming the wall but worried this will crack for ever more.

    I would rather not overboard the wall if it can be avoided but it is an option. Is there any form of mesh or other method that can be plastered in to prevent cracking?
     
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  3. Godwasaplasterer

    Godwasaplasterer

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    scrim tape the cracks and any other areas that may crack , like over and around the door or window .
    you can buy a 4” wide scrim tape and do the whole wall if you wanted to. that would cure it.
    plasprime the whole wall ,over the scrim tape and skim.
     
  4. Godwasaplasterer

    Godwasaplasterer

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  5. Godwasaplasterer

    Godwasaplasterer

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  6. Godwasaplasterer

    Godwasaplasterer

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    watery pva the wall the day before sticking the scrim on .
     
  7. tell80

    tell80

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    Without pics or more details its hard to advise you.
    This might help but no guarantees.

    A basic crack repair for a significant wall crack is to hack off plaster back to brick and block for about 300mm on each side of the crack - then using clout nails nail a single piece of expanded metal mesh to the open beds and perps. Nail the edges and the centre.
    Then take up suction and plaster over and skim as usual.

    Metal mesh used in plastering or rendering can come in wide rolls or single sheets - tell the supplier what its for and the dimensions needed.
     
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