Hanging heavy mirror

[Intox86]

Hi,

New here so apologies if this isnt the right place.

I have a heavy mirror to hang in the livingroom the assumption was the wall was solid masonry however when drilled it appears to be completely plaster?

Drill best went about 10cm deep and walls are approx 13cm deep.

For context, we have just moved into this house which was built in 1991, I have also attached a picture of the drill hole.

Can anyone please advise what type of wall this is and what type of fixing would be best to get the mirror up?

I tried the self tapping metal fixings but they just pull out.

Thanks

 

[SithLordHood]

Hard to tell from the photo, could it be that you drilled through plasterbaord into dot-and-dab then into breeze block?
Was the effort required during drilling constant all the way? In my experience dot and dab is hard as nails but breeze block is nice and soft.

Also could try tapping the wall in varios places, does it sound hollow? If you have any sockets/switches/tv points on the wall you could CAREFULLY unscrew the faceplate (isolate power if its a socket outlet/switch) and see what type of backbox is fitted and how it is mounted in the wall, would give an idea as to its makeup.

If it appears brick/breeze id use a suitably sized rawl plug.

 

[Intox86]

Effort required to drill was pretty consistent. When tapped walk doesnt sound hollow at all which made me think it was solid masonry.

I was having a look at some of the corefix universal plugs i dont know if any one has experience of them. They claim to bulge in masonry or knot in plasterboard, was thinking they may be the solution.

Will have a look at the switches tomorrow maybe.

Thanks

 

[foxhole]

Was there insulation wrapped around your drill bit on removal ?
What size holes ?

 

[Intox86]

I think they were 9mm holes, no insulation

 

[opps]

Was all of the dust light grey? If yes they may be thermolite blocks.

When I built my (former) garage, I used thermolite, then timber battens and plasterboard over the top. I used Corefix to bridge the gap between the blocks and plasterboard so that I could have horizontal shelving strips. I went for Corefix because they have a metal insert which bridges the gap.

If you have grey plaster over thermolite (aerated cement block) and the mirror really is heavy, and only has one mechanical fixing, I would be inclined to use a chemical anchor. You drill a holes slightly larger than the fixing, remove the dust from the hole, squirt in the resin, then, pretty quickly push the screw or threaded bolt in. Again, if only one fitting, drill down at a slight angle. It is worth noting that you will not be able to adjust the projection from the wall once the resin has cured.