Looking to hang a mirror (about 10kg) on a pair of screws on the wall of our newly renovated living room. Weight is likely to be 90% downwards rather than any kind of "pull out" force.
Hindsight is 20/20, but during the refurb I didn't notice I wasn't going to line up with the original cornicing in the ceiling so ended up having double board the wall to make everything line up.
Now that I'm looking to hand something on the wall I suddenly realise that I've got a slight issue in that the wall is now made up of:
2mm plaster skim coat -> 12mm plasterboard -> 12mm plasterboard -> 25mm insulation
There's then about a 10mm gap before "random stone" wall (1890 victorina build).
I'm not sure what fixing would even work with such a "thick" wall... None of the example in these kind of videos (https://www.youtube.com/watch?v=mIEY3E4fiDk) will likely work as either the bits designed to grab onto the back of a sheet won't expand (because there's another sheet blocking it) or there's not enough room to put things through (like the various toggle ones) because of the insulation and then small gap at the very back.
The self drilling/spiral plasterboard screws always get awful reviews but that's aways in comparison to something else... I'm sure if you compared it to "just a screw" (like I have at the moment) they might be better... but got nothing to base that on
Any suggestsion welcome!
Hindsight is 20/20, but during the refurb I didn't notice I wasn't going to line up with the original cornicing in the ceiling so ended up having double board the wall to make everything line up.
Now that I'm looking to hand something on the wall I suddenly realise that I've got a slight issue in that the wall is now made up of:
2mm plaster skim coat -> 12mm plasterboard -> 12mm plasterboard -> 25mm insulation
There's then about a 10mm gap before "random stone" wall (1890 victorina build).
I'm not sure what fixing would even work with such a "thick" wall... None of the example in these kind of videos (https://www.youtube.com/watch?v=mIEY3E4fiDk) will likely work as either the bits designed to grab onto the back of a sheet won't expand (because there's another sheet blocking it) or there's not enough room to put things through (like the various toggle ones) because of the insulation and then small gap at the very back.
The self drilling/spiral plasterboard screws always get awful reviews but that's aways in comparison to something else... I'm sure if you compared it to "just a screw" (like I have at the moment) they might be better... but got nothing to base that on

Any suggestsion welcome!
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