Loose Window Boards/Cills

[skybluescooby]

Hi,
Just had double glazing put in and when the guys were ripping out the old windows they managed to loosen a few of the internal cills and i'm wanting to know how easy it is to screw them back down.
Following the disturbance I can see three patches where screw holes have been filled and then glossed over.
I am aware that its a case of popping a few rawplugs down and screwing up, but i need to know what size and where to drill as i'm not too sure if there will be a cavity under the cill or if its all brick.
The house is 10 year old and the cill is mdf if that helps.
Thanks in asvance

 

[noseall]

it will be a bit hit and miss really. you're just going to have to take pot luck and drill a 7mm hole, plug it with brown plugs and hope a 3 inch 10 will pull down.

 

[skybluescooby]

Cheers Nose All
Off to the shed now for my ingredients.
Thanks again