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Patching up old wood lath and plaster


 
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bizron

from United Kingdom

Joined: 14 Jan 2010
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Location: Bristol,
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PostPosted: Tue Nov 30, 2010 2:49 pm Reply with quote

I need to patch up parts of old wood lath and plaster where the wood is exposed, what should I use? Also there are quite a few areas where the render is loose and no longer attached to the lath at all. Of course one option would be to remove the whole lot and whack up wallboard but that would be very dusty and involve emptying the bedroom of its furniture, is there a less drastic way of tackling the problem? Cheers icon_cool.gif
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Diyisfun

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PostPosted: Tue Nov 30, 2010 3:46 pm Reply with quote

I suppose it depends on the area, I had small patches, I just put plaster on it. Been there for a few years now.
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roughcaster

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PostPosted: Tue Nov 30, 2010 4:37 pm Reply with quote

Cut away plaster a few inches away from the loose areas,

Clean it down with a brush and water, plus rake out between the laths.

PVA over the whole area, especially the existing edges.

Fill it out to half thickness,

Scratch it,, let it set,

Bring it out flush ready to finish with multi.



I "always" skim the whole wall/s after patching the loose areas.
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danielrobson

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PostPosted: Tue Nov 30, 2010 5:13 pm Reply with quote

roughcaster on your filling coat what did you use? bonding?
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roughcaster

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PostPosted: Tue Nov 30, 2010 6:00 pm Reply with quote

danielrobson wrote:
roughcaster on your filling coat what did you use? bonding?


Yep,,, bonding coat Dan.
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bizron (30 Nov 2010)
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bizron

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Joined: 14 Jan 2010
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Location: Bristol,
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PostPosted: Tue Nov 30, 2010 8:58 pm Reply with quote

Roughcaster thanks for your detailed response but after what you said I think that in reality I'm going to have to remove all of the old plaster back to the lath because all of it is loose. Then I guess wallboard is the quickest and easiest option? but if I wanted to give it a scratch coat would I use bonding? Cheers
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roughcaster

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PostPosted: Tue Nov 30, 2010 10:14 pm Reply with quote

If it's all loose Biz, then you're right, it's better to remove the old plaster. You might be able to leave the old wooden lath on though, and board on top of that. If you do it that way, give the lath a good clean off, and make sure all the remnants of plaster are removed, so that the wall board lays flat onto the lath. Fix it on with plenty of 35mm drywall screws.
I always use bonding coat to plaster back onto wooden lath, whether it's a patch or a whole wall/ceiling. I reinforce "across" the lath between the backing coats too, with 3" hessian scrim..
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bizron (1 Dec 2010)
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bizron

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PostPosted: Wed Dec 01, 2010 12:38 pm Reply with quote

Cheers roughcaster just the info I needed. icon_wink.gif
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spc

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PostPosted: Sat Apr 02, 2011 10:48 pm Reply with quote

hmmmmmmm why gypsum a nicely lathed wall?
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plstering

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PostPosted: Sat Apr 02, 2011 11:11 pm Reply with quote

iv got 9 bags of bond here if you want them m8
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roy c

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PostPosted: Sat Apr 02, 2011 11:23 pm Reply with quote

Check the date boys... icon_wink.gif
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plstering

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PostPosted: Sat Apr 02, 2011 11:27 pm Reply with quote

14th of jan the post is but the bonding is in date icon_lol.gif
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spc

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PostPosted: Sat Apr 02, 2011 11:42 pm Reply with quote

bet the laths are still in date too icon_razz.gif
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jrplastering

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PostPosted: Sun Apr 03, 2011 9:58 am Reply with quote

did no one else notice roughcasters magic floating knife in pic 1......i want one
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spc

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PostPosted: Sun Apr 03, 2011 10:57 am Reply with quote

its like micky mouse in fantasia, if only he could apply the same knife trick to bringing muck up the stairs from the mixer and on to the board icon_lol.gif
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