I've been tasked by my other half to try to repair a handrail up the stairs at my mother-in-laws. The house is early 60s, ex-council, and some(?) internal walls are breeze block. This includes where the rail is fixed, and over time, the fixing at the top, secured with standard wall plugs, has worked loose. It's tightened up OK once, but the holes in the block the fixings are in are getting crumbly, the holes have opened out, it's not just a quick twist with a screwdriver.
I could probably bodge some bigger plugs in the holes, but I reckon that would probably fail again.
What's the best approach? Ideally, I'd like to not have to move the whole rail. Is there any way to stabilize and pack the holes that's likely to last decent time and the strain of people using the rail for support?
Is there a resin product that could do this, or is that being optimistic?
Thanks
Chris