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blob of foam is what i use for back filling, only had a few grip it’s fail and i have used a lot of them. what i find odd in your pic is how neat the hole is which should mean a nice secure fixing.
just used some blue ones for radiators in insulated plasterboard so bought the undercutting tool to clear the space behind in the insulation and they feel very secure.
now use fischer duopower for blinds, pictures etc as they use a smaller hole and seem to work well in the insulation, the duotec fixings are good too if a bit pricy.
Mr_Smyth
Soul
Gripit fixings can fuck right off. They fail all the time and they’re a complete pain to fit. Wish I’d never used them 5 years ago when we moved in.
Now I’ve got to fill 6 of them this week. They’re 20mm holes.
What’s the best way to pack them out before filling or can I just build up some toupret quick dry stuff?
Expandable foam?