I'm using a piece of worksurface as a splashback, mainly because it's cheaper than buying the matching much thinner wall panel
So how do I fix it?
Ideally I don't want to use glue/mastic etc as I feel it will take off the plaster when I (or the next owners) want to remove it
I thought there were special keyhole thingies which you dug into the back.....but no-one knows what I am talking about - Help?