Screwing into porous wall with air gap

[grovspacklarn]

Check first if you have wood behind the plaster!

What kind of construction is it where you have wood on a brick wall indoors in an apartment? Never heard of it

 

[Jansson69]

If it were wood, shouldn't the Elfa plug have held when I tried?

Have you tried driving in a wood screw?

 

[Jansson69]

What kind of construction is it where you have wood on a brick wall inside an apartment? Never heard of it

I have never heard or seen reed mat on a brick wall without these being made on plank walls, see the links in my previous posts.

 

[grovspacklarn]

I have never heard or seen reed mats on a brick wall, they were used on plank walls, see links in my previous posts..

Now the OP has said that there were bricks behind the plaster, though, see his first post...

 

[tobiasger]

I have never heard or seen reed mat on a brick wall without these being made on plank walls; see links in my previous posts...

I had a brief conversation with the property manager for the apartment who claimed that the interior walls consist of plaster, lightweight concrete, and reeds. The exterior walls were a bit more unclear, but when I described how I experienced it, as I described here, they thought it sounded likely. That it is about plaster, an air gap, and a "harder core" as they put it.

 

[Jansson69]

I spoke briefly with the property manager for the apartment who claimed that the interior walls consist of plaster, lightweight concrete, and vass. The exterior walls were a bit more unclear, but when I described how I experienced it, as I described it here, they thought it sounded likely. That it was about plaster, an air gap, and a "harder core," as they put it.

Now take a wood screw and test it, there are so many ignorant people you seem to listen to!

 

[tobiasger]

Now the original poster has said that there was brick behind the plaster though, see his first post...

It could very well be something other than brick as well, I can't swear that's the case. But it is hard in any case.

 

[grovspacklarn]

I had a brief chat with the property manager for the apartment who claimed that the interior walls consist of plaster, lightweight concrete, and reed. The exterior walls were a bit more unclear, but when I described how I perceived it, as I described it here, they thought it sounded likely. That it thus involved plaster, air gap, and a "harder core" as they put it.

Sounds more like they have no idea.

If it turns red when you drill into the wall, it's brick. If it doesn't, then it's something else.

 

[tobiasger]

Now take a woodscrew and test; there are so many ignorant people you seem to listen to!

Haha. Yes, it's a bit difficult to determine who is ignorant or not when you yourself are a bit all thumbs. But I will test it tomorrow.

 

[tobiasger]

Sounds more like they have no idea.

If it turns red when you drill into the wall, then it's brick. If it doesn't, then it's something else.

Yes, I've experienced that it dusts and dirties the surface quite a bit when I've drilled into brick before, but nothing I notice afterward or thought about when I drilled. But I'll double-check this tomorrow!

 

[Jansson69]

There is no reason to have reed mat on either brick or lightweight concrete as these materials are plastered directly on. Reed mat is a plaster carrier used on wooden walls/plank walls that could then be plastered with mortar.

 

[tobiasger]

There is no reason to have reed mat on either brick or lightweight concrete as these materials are plastered directly onto.
Reed mat is a plaster carrier used on wooden walls/plank walls which could then be plastered with mortar.

Got it. But as I mentioned earlier, if it had been wood, wouldn't the Elfa plug have worked earlier? As I said, I drilled 6 mm and could relatively easily tap in the 8 mm plug afterward. And then the screw never held.

I also tried, as mentioned, to screw directly into the wall first, but with the accompanying screws from Elfa and not wood screws, and that didn't hold either and felt loose.

 

[Jansson69]

Got it. But as I mentioned earlier, if it had been wood, shouldn't the Elfa plug have worked earlier? As I said, I drilled 6 mm and could relatively easily hammer in an 8 mm plug afterward. And then the screw never held.

I also tried, as mentioned, to screw directly into the wall first, but with the screws provided by Elfa and not wood screws, and that didn't hold either and felt loose.

It's either a cloison wall that I have linked to.
Or lightweight concrete with plaster, in which case you need lightweight concrete plugs.
But you need to figure out the construction before you can proceed with the correct mounting method.
Because you have drilled into the wall and no brick dust, often red from red brick, has appeared.
What kind of facade do you have on the outside?

 

[tobiasger]

What type of facade do you have on the outside?

It's brick. Then there is, for lack of knowledge and technical terms, a bit “blurred” as if some kind of fix has been applied over the brick so that the contours of the stones are not so sharp. But definitely bricks. Completely irrelevant perhaps, but that's how it looks.

 

[Jansson69]

It is brick. Then there is, for lack of knowledge and technical terms, a bit "blurred" as if some kind of fix has been applied over the brick so that the contours of the stones are not as sharp. But definitely bricks. Completely irrelevant perhaps, but that's how it looks.

Do you have any pictures?

I have been involved in a multi-story building where inside a solid two-brick wall they had nailed up a splinter panel and then a reed mat with plaster, this is not a very common method but I guess it was done with some thought to a bit of insulating effect with the air gap that the panel on the inside creates...
Thinking if you might have something similar...

When you test wood screws, use at least 5x90mm screws...