I am working on a balcony, made of concrete, and I've encountered a problem I don't know how to solve sustainably.

Last year, a metal worker helped me attach a drip edge around the balcony, directly on the concrete. After that, I applied self-leveling compound to the entire balcony, including a good bit over the drip edge (but still inside the balcony). The plan is to now install tiles, but then I realized a problem.

It turns out that the concrete wasn't perfectly even because the metal doesn't sit flush all the way. This naturally causes the self-leveling compound to crack from movement when I stand on the compound that is above the metal edge.

I suspect it's not particularly good to lay tiles on this, but what can I do about it?

Can I spray something very loose under the metal edge, like foam sealant, to ensure it has full coverage underneath? Anything else?
 
I would glue it and put weights on it, then look for a good fix that can handle some movement.
 
The more I look at and get annoyed by this, I'm thinking about redoing it completely. If I do decide to drill out all the fixtures, how should I proceed to get this perfect?
 
No one with a good idea? I can't be the first one with a drip edge who wants to lay tiles on the balcony, partly on top of it?
 
I have now removed all the metal, got sika t2 adhesive and now I'm planning to attach everything again. But I encountered another basic problem, how do I open the metal tube with the adhesive?? Does anyone know?
 
I have a concrete balcony with a drip edge in sheet metal. It was then built up like a bathroom floor with waterproofing membrane because the concrete was leaky and it leaked into the room below. Some leveling was done before the waterproofing layer, also to get the correct slope. Then tiles were placed on everything, all the way out to the edge over the sheet metal. This was done five years ago and still holds up.
 
I think your base was both smoother and the sheet metal better placed than mine, unfortunately.

But now the correction is not far away. I have now fully glued 2 of the sheets, and they are rock solid and completely still. Seems promising!
 
What do you have under the balcony?
Keep in mind that you might need some kind of waterproof layer...
 
I have absolutely considered applying a waterproofing layer, but in my case more to prevent damage to the plaster underneath since I only have an entrance below. I bought one from weber that is recommended specifically for balconies and which I hope will work well, especially now that the adhesion seems to be very good.

Makes you think you always have to do everything twice :).
 
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