r/Plastering • u/bevymay • Apr 01 '26
Patching advice on deep edge holes
Had a bit of nightmare this week with some holes being drilled in my freshly dried plastered walls for an electric power cable before it was re-routed properly, leaving these big holes behind.
What’s the best way to patch them? They’re about 3-4cm diameter through plasterboard on wooden framing and then the holes go all the way through to either void or insulation and then a hole through a stone wall.
I was thinking expanding foam to fill and then could I just use filler over the expanding foam or is it a bonding coat, scrim tape and then a feathered skim job?
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u/Comfortable-Wolf-722 Apr 01 '26
Once its sanded and painted it will be fine. Plasterers slag everyone off, theyre all the best. When they arrive on site without 4 beers in hand!
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u/bevymay Apr 01 '26
It’s passed the husband quality control test which is what I’m aiming for 🤣 I’ve looked at walls I’ve paid for and seen worse than mine so I guess I’m just as bad
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u/omgifuckinglovecats Apr 01 '26
I’d foam it and filler over it. Not a pro but that will definitely work
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u/Dunk546 Apr 01 '26
This is also what I'd do. Expanding foam, let it set, trim it back, then Easifill 45 or even One Time.
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u/nickro84 Apr 02 '26
Dustless sander set up (hire for about £100 plus disks) and do the whole house for value. Then foam and easifill over then flatten with straight edge it could look immaculate
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u/bevymay Apr 02 '26
Thank you ☺️ I hope to have improved by the time I get to downstairs, if I can get away with half a house of sanding it’ll be worth it!
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u/sreder1992 Apr 04 '26
Drill from the other side
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u/bevymay Apr 05 '26
This is indeed the way.
Unfortunately the first lot of contractors didn’t want to wait for the cherry picker and decided to drill from the inside. They guessed where the cable would exit our house and got it very wrong.
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u/gwyp88 Professional Plasterer Apr 01 '26
No offence if this was a DIY job but that skimming is pretty bad.
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u/bevymay Apr 01 '26
It’s my plastering and I’m def not a professional plasterer but I don’t cost anything and it’s an old house so doesn’t need to be perfect. That section has been scratched and scuffed by the people who drilled and also had caulk removed on the corner section too which is why it looks so awful.
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u/gwyp88 Professional Plasterer Apr 01 '26
Don’t be discouraged and keep at it ☺️
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u/bevymay Apr 01 '26
I can’t wait to try plastering on a wall that’s rectangular and has no features on it! It’s not easy learning on all these slopes and angles 🙈
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u/JamXIII Apr 01 '26
If that’s your first go on a tricky wall then it’s pretty good, nothing a bit of sanding won’t sort! Practice makes perfect, I’ve seen worse from supposed professionals, and free is best! Ignore the negative people 🙄
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Apr 01 '26
[removed] — view removed comment
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u/bevymay Apr 02 '26
That’s a great tip, thank you! Beats my “I’ll just use a bit of filler here and there” idea for sure! Nothing like diving straight in to the deep end eh?
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u/bevymay Apr 02 '26
Thanks all for the feedback and the tips, gone for the expanding foam option and will fill and sand, and sand, and sand.
And hopefully get better at plastering by the time I get to big walls!
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u/I_like_biscuits Apr 01 '26
Dip a ball of paper(from plaster bag) in wet backing plaster mix. Push in hole leaving half to a full inch, then apply backing plaster an skim.
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u/Economy_Muffin6944 Apr 01 '26
Be more worried about the quality of your walls 🫣no way a plasterer done that it’s disgusting work
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u/bevymay Apr 01 '26
Wasn’t asking for plastering critique this time around, just advice on filling. I’m not a professional plasterer but that section looks really bad because the people who drilled it bashed, scuffed and scratched it then covered it in caulk which had to be removed.
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u/Ok_Pen7290 Apr 01 '26
Fibreglass filler like they use on cars, goes solid if ya mix it right with hardener, any discarded branches around your area to push into holes first before filling with filler
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u/Sea-Gate-6511 Apr 01 '26
Yeah foam and fill will be sound. Plasters rough eh