We have relocated a basement door and the old opening was sealed with Leca blocks. Now it's time to finish the interior, but the blocks don't align with the rest of the wall, so we need to fill the niche of 5-8 cm somehow.
The rest of the wall consists of plastered Träullit, but I haven't been able to get more of those panels. My idea was to use aerated concrete panels and plaster them, but that seems like an unnecessarily luxurious filling material, doesn't it? Foam between metal studs and then drywall might work, but then it would create a smooth and even surface in contrast to the otherwise rough wall, and I prefer to retain a coarse texture. Can that be created on drywall somehow?
Does anyone have other tips for methods to fill the niche?
The rest of the wall consists of plastered Träullit, but I haven't been able to get more of those panels. My idea was to use aerated concrete panels and plaster them, but that seems like an unnecessarily luxurious filling material, doesn't it? Foam between metal studs and then drywall might work, but then it would create a smooth and even surface in contrast to the otherwise rough wall, and I prefer to retain a coarse texture. Can that be created on drywall somehow?
Does anyone have other tips for methods to fill the niche?
You can scrape all plastered surfaces as much as you want. It's mostly about finding a technique that makes your new plastered surface as similar as possible to the rest of the wall. Whatever filling material you choose, you're facing the same problem with the plastered surface.
Personally, I would have chosen to fill with the same material as the rest of the wall, that is, leca. I wouldn't plaster organic material into a basement wall (if you're thinking of using regular drywall).
Personally, I would have chosen to fill with the same material as the rest of the wall, that is, leca. I wouldn't plaster organic material into a basement wall (if you're thinking of using regular drywall).
I looked at Leca, the thinnest I found was 8-9 cm but the niche is shallower. It ended up being lightweight concrete slabs, realized as you said that it was best to avoid organic material against the basement wall. It's my first time plastering so I'll need to find the basic technique first! 
Leca is available in 70 mm width. Does that work?K Kahuna said:
https://www.finja.se/produkter/block/murblock-bas-70
Share a picture of what you want to achieve and surely someone skilled in the Forum can suggest an appropriate technique =)K Kahuna said:I checked Leca, the thinnest I found was 8-9 cm but the niche is shallower. It became lightweight concrete slabs, realized as you say that it was best to avoid organic material against the basement wall. It's my first time plastering so I'll have to find the basic technique first!