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  1. #1
    Join Date
    Aug 2007
    Location
    Noosa Heads
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    549

    Default Butt join cracks in ceiling gyprock

    Hi all,

    I've put up and finished a gyprock ceiling - all very nice - Except - where I have butt joined sheets tiny cracks keep appearing along the join. I fill them, repaint but they come back!! Grr!

    does anyone know how to permanentlly hide these cracks?

    DD

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  3. #2
    Join Date
    Mar 2007
    Location
    pakenham
    Age
    57
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    219

    Default

    Did you use joint tape?
    if not then this is the reason for the cracking, there is slight movement in the boards.

    The tape i used recently was the self adhesive mesh tape but i have used the paper tape in the past.

    Hope this helps,

    David

  4. #3
    Join Date
    Aug 2007
    Location
    Noosa Heads
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    549

    Default

    Hi David - yeh I used paper tape 30cm wide set into base coat. Joints are also back battened. I would say there is still some slight movement in the sheets and stress opens up the small cracks.

    DD

  5. #4
    Join Date
    Mar 2007
    Location
    pakenham
    Age
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    Default

    It's only my opinion but I have had better results with the mesh tape, no cracks in any of my joints in over 12 months.

    David

  6. #5
    Join Date
    Mar 2005
    Location
    Melbourne
    Posts
    150

    Default

    When the plasterers did my joint they fixed pieces of plasterboard across the roof side of any joints using plasterboard adhesive. Don't know whether this would fix your problem but I suspect it might go a long way towards acheiving it. Of course, they also did the appropriate jointing on the room side which I think was pretty much what you have been doing.

  7. #6
    Join Date
    Jul 2006
    Location
    Melbourne
    Posts
    709

    Default

    Only ever use paper tape on ceiling joins. Never never never use mesh tape on ceilings. THEY CRACK.

    Now having said that, to fix your crack go to this post.

    http://www.woodworkforums.ubeaut.com...ad.php?t=34763

    That will give you all the info you need
    Great plastering tips at
    www.how2plaster.com

  8. #7
    Join Date
    Aug 2007
    Location
    Noosa Heads
    Posts
    549

    Default

    Thanx Rod ,
    that link gives lots of info.

    Looks like I'll be up the ladder again! I'll try rewiping join and using that paper you advised, although I already have paper tape in there. While in the plasterboard shop I might look at rondo mouldings just in case .

    many thanx Doog

    another forum mentions Goof off spray - anyone tried it?

    http://www.painterschatroom.com/dc/d...=523&mode=full
    Last edited by Dirty Doogie; 13th August 2007 at 10:28 PM. Reason: want to add something

  9. #8
    Join Date
    Jul 2006
    Location
    Melbourne
    Posts
    709

    Default

    no I have never heard of it
    Great plastering tips at
    www.how2plaster.com

  10. #9
    Join Date
    Jun 2007
    Location
    Houston
    Age
    71
    Posts
    194

    Default

    I know that this may sound like a stupid question, but did you fasten the joints well at the seam. I found, with DIY's, frequently the rock was not held firmly against the joist while nailing/screwing. This will cause the joint to crack. Working by oneself it is difficult to hold the rock firmly up while nailing also. As an aside, those self adhesive mesh tapes are totally inadequate. Paper tape backed well with compound is the only way to go. Hope this helps, I was a drywall contractor for years before I got into maritime work.
    "If the doors of perception were cleansed everything would appear to man as it is, infinite."

    William Blake

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