Patching Extractor Hole

[LordBucketHead]

I've removed an old extractor fan (to replace it) and lumps of plaster fell on the floor.
I'd like to firm the hole up where the wall plugs are and was thinking about using foam.
I thought it best to ask for advice before I do anything and I'm open to better suggestions.
Thanks for reading !

 

[Wayners]

Water down some PVA or wood glue and lash around to prime and bind surface.

Toupret rock solid filler

 

[accelerator]

Will you be re-using the current wall plugs? Will the new extractor fan fit in them?

 

[jj4091]

Clean the pipe out first

 

[LordBucketHead]

Thanks for the replies. Much appreciated.
@Wayners - cheers - looks like I'm going shopping
@accelerator - pic below showing slots - there's no plaster for the top right slot
@jj4091 - I'll get Henry on the job

 

[accelerator]

@accelerator - pic below showing slots - there's no plaster for the top right slot

Hmm don't really know what you're on about, but anyway, don't use foam, you'll need to rebuild the surface with some sort of filler to get something decent to drill in to for the new fixing holes.

 

[LordBucketHead]

Hmm don't really know what you're on about, but anyway, don't use foam, you'll need to rebuild the surface with some sort of filler to get something decent to drill in to for the new fixing holes.

I've marked on the wall in pencil where the slots are on the new extractor (shown with red arrows) - but there is no plaster where I should be drawing the position of the top right hand side slot. Sorry I could have worded it better I s'pose. I'll order some Toupret Rock solid filler & PVA as suggested by @Wayners

 

[Harry Bloomfield]

Hmm don't really know what you're on about, but anyway, don't use foam, you'll need to rebuild the surface with some sort of filler to get something decent to drill in to for the new fixing holes.

Were it me, I would find a bit of plastic pipe, of a diameter to clear your new fan, with clearance. See if you can get that to stay put in the hole, then mix some sand and cement, to fill in between the pipe and rest of plaster, but finish it below the plaster face. Wet the face, first.

Let it almost set-up, but twist the pipe carefully out, before it is fully set. Finally, finish it off with plaster.