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i need some rendering advice

Discussion in 'Plastering and Rendering' started by goateater, 12 Apr 2021.

  1. goateater

    goateater

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    hi all
    got a small concrete block wall that needs re-rendering (old render looks like it was removed years ago) it between 2 windows its only around 1.5 sq mts (1.3 mts X 1.25mts)
    it needs 30mm to bring it out level with the brick work either side of the windows
    here is my thoughts/plan
    1 basecoat of 15mm concrete (4 sand 1 cement) scarifer the surface
    fit 15mm pvc beading
    1 coat 15mm tarmac one coat render

    or should i go with more thinner coats of concrete/tarmac one coat ?
    I will need to build up the level so i can fit on the Pvc beading (10mm or 15 mm beading)
     
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  3. Notch7

    Notch7

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    I'd be tempted to screw on strips of 18mm ply, then fit 12mm rendaboard.
     
  4. goateater

    goateater

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    would that hold up to the weather ?
    i get a lot of wind and rain that side of house

    just had a re-measure area is 147cm x 136 cm
    so would need a joint in the renderboard

    if i put up strips of marine ply, should i put insulation boards to fill the gap ?
    should i screw or glue the renderboard on to the marine ply ?
     
    Last edited: 12 Apr 2021
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