I need to hang a 25Kg mirror on a wall, however I do not know what type of wall it is, I think it is possibly plasterboard or thermalite blocks.
I have been looking at various fixings online, and you get a lot of variation between plasterboard and thermalite wall plugs, and also wall plugs that can be used within different wall types.
Is is best to drill the wall and find the wall type and use those specific wall plug types, or buy the wall plugs that are suitable for any wall type?