Patching a Chase in Wall...

Soldato
Joined
2 Dec 2009
Posts
4,018
Location
Midlands
Hi all, any tips for patching the following two chases (electric cables) - the first is plaster/browning and the other is plaster board. Deep fill polyfilla is rubbish as it doesn’t adhere and simply falls out.

 
As a non-builder and non-plasterer, I don't have the usual tools available (mixing tool, etc) so I would ideally opt to use ready-made products. Would this impact on the finished result?
Something like using the plasterboard adhesive here: https://www.screwfix.com/c/sealants-adhesives/plasterboard-adhesives/cat9780001

And then fine finish ready-made plaster such as that here: https://www.toolstation.com/fill-skim-ready-mixed-lightweight-plaster/p44295

As for the plasterboard holes, I'm reluctantly going to have to locate some plasterboard and cut it up it seems. Any tips on securing it as there is around a 2" airgap behind the current surface and the breezeblocks?
 
As recommended by everyone, I ended up using plasterboard screws to screw in a smaller bit of drywall to the breeze block, then used filler around it.

Random orbital sanded it until no discernible lip or join to the touch, few licks of emulsion paint, and now just needs final coat of vinyl matt.

The proper browning chase is completely filled just needs random orbital sanding and then painting :

 
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