I need to anchor an Ikea bookcase and a drawer to the wall, but despite days of Internet research I am not able to identify where I can drill a hole in my wall. I have tried knocking on the wall to listen to the ‘depth’ of the sound to distinguish masonry from drywall. I think the wall onto which I am planning anchor the furniture is a drywall based on the hollow sound upon knocking. Now I am trying to identify the studs within the wall, but the sound method is not helping as every knock sounds the same. I bought a stud finder to no avail as it is not giving me reproducible results and it’s not identify studs in a periodic pattern which makes me think that there is something wrong with it (or the way I use it). I found the hole in the picture. I am wondering if it is possible to identify the wall type from the picture of this hole (whether it is masonry or drywall). enter image description here

I’d be very grateful if someone can guide me on how to identify where I can drill a hole in the wall to attach somewhat heavy furniture like a wardrobe or a bookcase.

Thanks in advance!

  • Looks to me like concrete (or masonry) all the way through. Is that light on the other side?
    – brhans
    Aug 24, 2020 at 18:45
  • It is light indeed. It’s a hole from one room to the other. I guess it’s concrete all the way. I was suspicious as the knocks sounded hollow.
    – melampyge
    Aug 24, 2020 at 19:11
  • How thick are the walls it could be block construction with a skim coat to make the wall smooth. How thick is the wall? Interior walls are not normally poured unless load bearing in the US because of cost.
    – Ed Beal
    Aug 25, 2020 at 19:56
  • Fyi, you don't need to anchor to a stud. It doesn't really matter how heavy the items are, you are just keeping them from falling over, the loads will not be significant. Aug 29, 2020 at 1:54

1 Answer 1


If drywall, look for drywall screw holes. Typically, the screws are drilled into studs for better anchoring. Try a magnet to expose screw heads.

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