DIY Doctor

Overboarding lath ceiling

Postby tring » Fri May 08, 2009 12:12 pm

Hello all,
Been lurking on here quite a while and have found most of my answers.
However I have some confusion about overboarding a lath ceiling.
I run the boards at 90 deg to the joists -Yes?
But there are no noggins between the joists, just joists with the laths then plaster, so what supports thoses edges between the joists where you would normally put a noggin if you were building a stud wall?
Should I use some board adhesive to glue it to the ceiling?
Or will it support itself over the distance - 16".
Tape the seams?
Also 9mm or 12mm? I was all set to get 9m as I understood it'd be easier to handle and not sag so much. Then I go on the project page and it says to use 12mm on ceilings as it wont sag so much??
Bit confused.
Thanks for reading this and helping out if you can.
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Postby bd3cc » Fri May 08, 2009 6:04 pm

The board with bound edges will supprt itself over 16".
9mm is lighter to handle than 12m.5 but will sag more, unless screwed at greater frequency.
Yes tape all joints.
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Postby tring » Mon May 11, 2009 9:20 pm

Thanks very much for your advice there HTH, much appreciated
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Postby tring » Thu Jun 25, 2009 8:18 am

Ok, so another question as I've had a good look and can't find any reference to it on here so far...
The room I'm overboarding is 3.5m x 3.5m.
I have the taper edge boards.
When doing the ceiling I'll need to join 2 boards end to end, i.e. no taper between them as the taper is only along the edges.
What should I do about this join?
Thanks very much for any help you might be able to offer!
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Postby kbrownie » Thu Jun 25, 2009 11:51 am

A couple of things to do, if your joint taping boards to fill out rather than plaster. On your square edge you can fill out a broader area so the edge is not as noticable or you can shave the edge of board down, to put a taper edge on it.
The later is a bit more hassle. I find filling out square edges much easier and does the trick. Remember that you need to apply and sand down jointing compond at least three times to have desired effect.
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