I am thinking of putting another handrail up my staircase, (we are getting old and crotchity),
The lower half of the staircase is ok to fix on as it is on blockwork but the top section, (1st Floor level) is a studded foil backed plasterboard wall. I would not trust hollow fixings in the plasterboard for such a potential load but I cannot identify the studs because the board is foil backed and my stud detector just bleeps everywhere.
Any ideas other than making trial holes everywhere?