Attaching studs to aerated concrete - nothing works!

[Marost]

Hello friends!

I'm renovating the basement, and now it's time to attach the studs before I drywall a new ceiling.

The problem is that the joists are made of old dry siporex lightweight concrete, and it is completely impossible to get anything to stick. So far, I've tried lightweight concrete screws, but they just crumbled the ceiling and didn't hold at all. Then I tried cut nails, which held a little, but when I hammered them through the stud, there was too much vibration, and they came loose.

I'm considering PL400 or something similar but don't know how to press the studs against the surface while it dries. I'm also a bit worried that the siporex is too dusty and rough for the adhesive to stick.

Can anyone help a poor soul with some tips?

 

[Stefan1972]

use loooong "spikplugg" instead. You can't glue if the ceiling is hanging on the beams, it won't be good enough and will most certainly come loose.

 

[Stefan N]

You have aerated concrete blocks in the ceiling, then? They usually have high density, so fastening there shouldn't be a problem. When using aerated concrete screws, it's important not to tighten them as much as you think; otherwise, they come loose.

 

[MathiasS]

I have the entire facade externally attached with long facade plugs in siporex, so I know that works.

I have counter-sunk heads on mine, but here is the product:

https://www.bauhaus.se/fasadplugg-8x120fh-fzb-tx30.html#full-description

 

[Andreas Blomkvist]

I have hopeless walls and ceilings at home myself. Sometimes 170mm nail plugs have worked but not always. What has almost worked best is to plug and then a new plug in it Otherwise, chemical anchors/anchor mass and thread with a nut. However, you have to sink them into the stud but then it is guaranteed to hold.

 

[smurfen72]

Facade plug usually attaches to most things.