How to finish a round window

[BrownBob]

Hi all, I am converting my loft and am doing as much of the work myself that i can. However i am an engineer, not a builder so i was hoping for some advice on a problem that i have.
I have fitted two round windows at each end to existing brickwork and i am wondering the best way to finish them.
The brickwork around the window is very jagged and untidy but i was thinking of trying to flatten it with a disk grinder and facing it with plasterboard, but i would love to know if there is a better (more professional) way.
Any ideas appreciated.

 

[OwainDIYer]

get a good plasterer to make a metal former and plaster a circular porthole in the internal wall.

 

[BrownBob]

Thanks for your reply, i was hoping to keep a square sill as we like to look out of them which wouldn't be too easy if they were deep and round. I guess a shallow one which opened out to square, which just covered the bad brickwork would be nice though. When you say metal former, what is this? i haven't heard of that before.

 

[OwainDIYer]

just expanded metal lath which the plasterer will form into shape then plaster over.

 

[BrownBob]

Thanks, i will have a word with my neighbour, he is a plasterer and offered to help when it comes to the plastering

 

[noseall]

Form a flat sill and have an arched top. Buy plastic arch beads for the top. In other words make it look like an arch top window.