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Which product to fill in ceiling vents?

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  1. #1
    "PHIL 'L FIXIT" ptrott's Avatar
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    Default Which product to fill in ceiling vents?

    I am filling in the old square vents in the corners of the ceiling. I have done a few with plaster, but it is not the best. It takes ages to dry, and has to have 3 or 4 more applications before all shrinkage is filled in.

    There has to be something better, Spakfilla??? Cornice cement?? What have you used successfully for thick filling in plaster?

  2. #2
    CONTRACTOR
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    Hi ptrott

    Use cornice cement, mix a portion with table salt to increase setting time. The more salt the quicker it will harden. You may be able to multi coat with one mix. Have done this repair hundreds of times without problems.
    Good Luck!

  3. #3
    Golden Member m6sports's Avatar
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    i did your whole house a couple of months ago and used spakfilla as the bulk fill in 2 layers
    then a coat of base filler followed by a skim coat and you cant tell they were ever there

    but as we are renovating the house before we move in i wasnt in a rush
    i let it dry a week between coats as im only able to work on the house on weekends

  4. #4
    1K Club Member autogenous's Avatar
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    Cut them out with small grinder. Put in backing piece of board. cut square to suit hole glue and flush.
    https://www.instagram.com/perth_bricklayer_wa

  5. #5
    "PHIL 'L FIXIT" ptrott's Avatar
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    Default

    Thanks guys. I'll get on with it with some confidence now.

    Cheers.

  6. #6
    Oink! Oink! pawnhead's Avatar
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    Quote Originally Posted by autogenous View Post
    Put in backing piece of board.
    Or forget about the backing board, and just leave a couple of inches of paper, hanging out around the perimeter of the plug. Put cornice cement around the hole first to set the paper to. In a ceiling the plug may sag before it's set if it's is too heavy, but a small vent plug, cut tight to fit, should be OK.
    Cheers, John

    Short Stack (my son's band)


  7. #7
    quality + reliability - 3k Club Member
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    Way too hard pawnhead,

    Master Plasterer hit the nail on the head
    GREAT PLASTERING TIPS AT


  8. #8
    Senior Member PlasterPro's Avatar
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    Quote Originally Posted by autogenous View Post
    Cut them out with small grinder. Put in backing piece of board. cut square to suit hole glue and flush.
    I like this option the best, depending on what finish you want.

  9. #9
    Oink! Oink! pawnhead's Avatar
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    Quote Originally Posted by rod@plasterbrok View Post
    Way too hard pawnhead,

    Master Plasterer hit the nail on the head
    Quick and easy if you want to get rid of the vent altogether.
    You don't like my easy-tape either, but there's only one small crack in my place (some of it was done 15 years ago), and I would have got that with paper tape as well I'm sure. I should have installed the plasterboard properly (running the sheet over the top of the doorway, instead of stopping on each side, and putting a piece over the top), but I was trying to save a bit on plasterboard. Nothing that a bit of paint won't fill anyway.
    Cheers, John

    Short Stack (my son's band)


  10. #10
    CONTRACTOR
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    Who mentioned easy-tape. I'll be having nightmares for months!!!


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