What wall material is this?

[herrjoa]

Hello!

My shelf started to give way and things have slipped off, fortunately, everything is okay but I noticed that the plug wasn't very tight and could easily be removed with just my fingers. I had drilled with a 6mm hammer drill and used 6x35 universal plugs along with some IKEA screws from their screw+plug kit. Now I'm planning to secure the issue and buy the right screws and plugs as I've planned to mount more things on the walls in the future.

Since I'm completely new to this, I don't know what material the walls are made of, so I'm attaching a picture (sorry for the quality) and can mention that there are small gravel grains(?) and a beige powder that seeps from the holes.

So I'm wondering what material the wall could be and which screws and plugs I can buy so that I can sleep in peace and not be woken up by something crashing to the floor!

Thank you so much for all the help!

/J

 

[BirgitS]

Your image is too blurry, and a picture of the hole in the wall would probably be good as well.

Did it go well drilling with the impact drill?
If so, it was probably not concrete because then you usually need a rotary hammer.

When was the house built?

 

[herrjoa]

Your picture is too blurry, and a picture of the hole in the wall would probably be good too.

Did it go well to drill with the percussion drill?
If so, it probably wasn't concrete because you usually need a concrete hammer for that.

When was the house built?

I suspected that, it went well, you can also drive screws directly into the wall. I can take a new picture and one of the hole. The house is from the 1930s, apartment.

 

[BirgitS]

@justusandersson what kind of interior walls do 1930s apartments usually have?

 

[justusandersson]

Plank walls with rörning (reed matting) and plaster or brick and plaster. Here it leans towards the former. In that case, you don't need anchors but rather a set of wood screws of varying lengths.