Coving Ceiling with different dips.

Discussion in 'Plastering and Rendering' started by Paul Shand, 7 Nov 2021.

  1. Paul Shand

    Paul Shand

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    Hi. I thought I would like to cove this old house. I bought some polystyrene coving from B&Q and a tube of coving adhesive.
    I watched a few videos on YouTube. I made myself an 82mm square block and proceeded to mark the corners in view of pinging a chalk line on the wall and ceiling. However, I then discovered the corners were not square.

    Some dip down and some rise up with dips somewhere near the middle of all four walls.. So, I started to measure the dips which are somewhere between 15mm deep all round. With such a variation, I realised that if I put panel pins all round the wall to shelve/support the coving, the gap at the top being sometimes the whole way across or just small spot to attach the top to, I am kind of stumped at present.
    I also realised I need to remove the ceilings wallpaper border to expose a firm surface to eventually attach to top/ceiling part of the coving to.
    Any ideas would be much appreciated! IMG_20211107_131238_417.jpg
     
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  3. foxhole

    foxhole

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    You could drop the coving 30mm or so below ceiling and a have shadow effect, I put led’s in mine.The lightweight cardboard covered coving is better than the polystyrene, looks like plaster coving.
     

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  4. Paul Shand

    Paul Shand

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    How did you attach the ceiling edge, with what?
     
  5. foxhole

    foxhole

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    It’s only attached to wall.
     
  6. Godwasaplasterer

    Godwasaplasterer

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    trouble is itll be 30mm in parts and only 15mm in other parts.
    15mm is nothing really, have you actually offered a length up to see if it will somewhat follow the contours.
     
  7. Paul Shand

    Paul Shand

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    Still, it needs to be firmly attached the ceiling edge due to the flimsy nature of the polystyrene. I am thinking maybe dot and dab, line it up nicely, let it harden, then fill it in nicely. Can't think of any other way.
     
  8. Godwasaplasterer

    Godwasaplasterer

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    that method would work with plaster coving, not sure how the lightweight cove would react with pb adhesive though.
    I didn’t think any of the modern lightweight covings were ‘flimsy’ .
    I fit loads of it and its very rigid.
     
  9. stevethespreader

    stevethespreader

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  11. stevethespreader

    stevethespreader

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    To level the ceiling up and take the dips out you could get a straight edge and some bonding and screed the edges ive done it to a few ceilings you will then have to skim the ceiling , also if you have the opposite to dips where the ceiling bows down you can scribe the top of the coving to fit
     
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  12. Godwasaplasterer

    Godwasaplasterer

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    scribe coving? like remove some of the feature line? :eek:
     
  13. tell80

    tell80

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    which room is in the pic? Is it GF or FirstFloor? investigte to find out why its dropping more than 15mm. thats more than a 15mm droop.
    do you intend to live with that ceiling paper becasue nows the time to remove it if you want a fresh ceiling finish.
     
  14. stevethespreader

    stevethespreader

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    Yes bud if theres a bulge in the ceiling "EDIT" same way as you would scribe a skirting board on the floor
     
    Last edited: 8 Nov 2021
  15. darrington

    darrington

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    That's exactly what I would do as well Steve, a far better looking job.
     
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  16. stevethespreader

    stevethespreader

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    Hi tony yes it's the bottom of the coving that catches the eye isent it? As long as thats straight
     
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  17. darrington

    darrington

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    Spot on Steve.
     
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