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Discussion Starter #1
Hi,
I've removed a cable conduit which was fixed to the wall before the walls were plastered (not by me!). I would like to fill the gap with plaster to get a clean finish prior to painting.
I intent to sand the background and fill with plaster, however I was wondering if I need to reinforce the joint between the new plaster and the old?
Thanks for any help
 

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Can you post a picture so we can see what it is you have to deal with?
 

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Discussion Starter #4
The photo is a close up of a section of missing plaster after removing the cable trunking.
It's about 2 inches wide and 3 metres long, on the internal corner of a stairwell.
Hope that give a clearer picture.
 

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From what I can see there I don't you need to reinforce just a good fill. Are you going to use plaster patch or joint compound?
 

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Plaster can not fill voids that size. Fill it with blue board then tape the joints and plaster it. Then you will need to add a tight coat of joint compound. If you try to use plaster to fill a gap that size it will fail, ie crack.
 
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