In the basement, I have constructed a 90mm leca layer as a base for an interior wall where the laundry room will be. The purpose is to maintain completely inorganic material up to the waterproofing height, and I will now build wooden walls on top of my small wall.

I want to avoid nail-plugging into the leca with the risk that the narrow row will crack, and I am now considering if it is possible to place a sill in wet mortar on top of the wall row.

Generally, it's a no-no to cast/mortar in wood, but this is a dry, ventilated environment, and I find it hard to see what the downside would be.

Thoughts?
 
One solution is to drill down a gängstång and secure it with anchor adhesive. Then attach the sill with a nut and washer.
 
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David_Berglund
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Yes, it can be.

Is there any risk of cracking a 90mm leca if drilling from above with a hammer drill?

It would have been smart of me to drill before I laid the bricks so I could discard any damaged blocks, but too late now.
 
Would of course be grateful for more feedback on the original question. :)
 
Feels like that, does it have to be wood then? Cast a steel rail against the lecan?
 
D David_Berglund said:
Yes, it could be.

No risk of cracking a 90mm leca if you drill from above with a hammer drill?

It would have been smart of me to drill before I built the wall so I could discard any broken blocks, but too late now.
Leca is porous. Just go gently and carefully, and I would be surprised if you manage to crack it. Don't forget the sill paper.
 
Lulaua Lulaua said:
Feels off, does it have to be wood then? Cast a steel rail against the leca?
I pondered that too, maybe it's better... Then it can sit there and dry in place before I frame with wood...
 
Can't you glue a steel rail with something like PL800 or equivalent? I don't think the mortar sticks very well to a polished steel rail. You'll probably just need to make sure to vacuum thoroughly so the leca is dust-free for the glue to grip.
 
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David_Berglund
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