Plastering or filled in with poly filler or spent g similar.

[jl421]

Had a new loft hatch fitted and he's left it like this. Does this need to be professionally plastered or could I fill it with poly filler or something similar??

I'd use filler and decorators caulk

Get the butcher back to do it properly. The outer wood (architrave?) is supposed to sit on the plaster, it looks like it is lower than the surrounding plaster. The hole is too big for the loft hatch.

Good point. I retract my previous comment - do this

I've used this stuff lots:

No Nonsense Instant Plaster Filler White 310ml - Screwfix

Just clean out any loose bits, fill, sand and touch up the paint

It's not a great finish. The installer should have taken care of that.

But I had similar in a place I moved into. You need some really smooth light filler - filler normally comes in different types, the sticky large grain type for filling big deep holes and the light runny type for filling shallow holes and cracks.

Fill the gaps up with this, sand it down and smooth it off, then finish off with caulk round the edge to seal. Finally you can paint it.

Which would you recommend?

Sorry OP, this is not a great finish at all. Did the quote include 'making good'? If so, definitely get the fitter back, it's a mess!

If you decide to go down the DIY route, I'd use a smaller tub of something like Wickes All Purpose Ready Mixed Filler to fix the larger areas. Apply as smoothly as possible, sand down any imperfections, paint, etc.

Additionally, wherever two different types of surface/materials meet (e.g. plaster and wood), there's always going to be a risk of cracking due to different expansion-contraction rates. So it would be worth finishing/sealing off the immediate edges of the loft hatch 'frame' with a caulk, as @GasPanic has mentioned.

The Instant Plaster Filler mentioned by @AnotherOneGone is a good product - easy to tool, can be lightly sanded and painted over - but it's probably not the best for this particular situation, as it's not flexible. Look for a caulk, or something marketed as a flexible gap filler. Happy to be corrected though!