I had some sparkies in to run a cable through my wall today, and they had to cut out these three holes to complete the job.
I'm looking to patch these up and found this guide - https://www.bunnings.com.au/diy-advice/diy-skills/repairing/how-to-fix-a-hole-in-the-wall which suggests using a patch then pasting some spakfilla over the top.
The sparkies themselves told me I should be able to refix the circular cut outs in there somehow then patch over that, however I'm not sure how best to go about this. As it looks like the walls are quite thick (double plaster board is what I think they called it) I would think it would be better to go this route.
I've seen guides online for patching a rectangular hole which involves cutting a backing board and fixing that in place first, but I'm not sure what I should be using for that. We have a few planks of this thing woody-mdf-like stuff which were used as packing material for some shelves we had delivered, should I just be cutting that to be roughly as wide and slightly longer than the diameter of the holes and fixing that in place with some spakfilla first? Or should I just put a thick layer of spakfilla around the holes and then just wedge the cut-outs back in place? The one hole what has some wood already plush against it is the one in the ceiling, while with the other hole there is a gap between the plasterboard and the wood.
