Hi
I hope someone can offer some help in relation to plasterboard repairs. As you enter our house we have an external corner made from plasterboard immediately in front of you. However for some reason the surface of the external corner has appeared to have "bubbled" and is now coming away from the main plasterboard (the bubbled segment is approximately 2mm thick (is this the plasterboard paper covering + a couple layers of paint?). What I want to do is repair this so that it looks as neat as possible. At the moment I am contemplating cutting out the bubble on both sides as it can't be pushed back flush and then putting some polyfiller over this and sanding it down. Will this be a lasting repair or should I try something else? Where it is an external corner in a hallway I am worried that it will get knocked a few times. Any suggestions are welcome (well the polite ones anyway!)
Thanks Matt