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I usually support the plasterboard
around all the edges with some ply or something to stop movement - which can end up cracking.
Also any movement in the board can allow a ridge to form when you’re skimming.
Edit; Is the left side cut back to the next stud? In which case after some glass tape and screws both sides of the vertical joins -you’re good to go.The original hole was at the large end of what is suitable for a California Patch which is a quick and cool way of patching holes in PB.
You square up your hole, cut your patch about 100-150 mm bigger, score the back to the size of the opening then snap and peel off the excess pieces. This leaves you with a patch with an overlapping front face of paper which you then just stick in place with plaster and skim over.
It’s kind of hard to explain.I was shown how to make them by a hippie plasterer in California- 😎
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absurdbird
@stevo_com
First go at patching plasterboard holes left by the previous owners. There were never big enough holes to warrant buying plasterboard, but the plasterers working on other rooms left behind some off cuts so decided to give it a go. They left half a bag of multifinish too so will be giving a go skimming this soon.
Two vertical battens behind the hole screwed above and below in the good board, to screw the patch board to.
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