ᐅ Balcony railings; issues regarding top-mounted brackets

Hello,

we have a terraced house built in 1966.
There is a common issue with the balcony railing brackets in all such houses.
The railing is supported by flat metal strips that extend a few centimeters (inches) inward, just above the concrete slab (so between the concrete slab and the tiles above), and then go vertically into the concrete slab.
Over the years, this allowed moisture to slowly get between the concrete slab and the tiles, which caused everything to deteriorate.
We have now removed the tiles above and also chipped away all the soft areas of the concrete slab.
Since then, the slab has been covered with a protective foil because we are not yet sure how to proceed in a cost-effective way.
The best, but also most expensive, solution would be a completely new railing with brackets attached from underneath the concrete slab. Our neighbor did this, and it looks great.
Unfortunately, this is probably not financially feasible for us.
Does anyone have experience with this and maybe an idea?
If the weather is good, I can take some photos and upload them here.
Perhaps there is a way to modify the existing railing or to securely seal the moisture ingress?

Thanks in advance.
Regards, Micha

From personal experience with an older building: There is no better solution than that of your neighbor. Alternatively, you can remove all the tiles, level the surface with screed, and install wood-look tiles. Possibly lay the wood-look tiles on a battens system.

Thank you for your reply!
Well, then we will consider everything.
Regarding patching with screed...
If I apply screed over these supports, which protrude about 10cm (4 inches) above the slab and then go vertically down into the slab...
then water will probably get between the slab and the screed layer again, right?
Do you have any ideas about sealing in this case?

There is liquid waterproofing that you can brush on. It seals quite well and is heat resistant.
Ask at a specialized store. We have additionally sealed our terrace on top of the garage in critical areas this way, and it has been holding up for 10 years. 😉

Thank you for the response.
That sounds very interesting and might possibly seal the water supply around these metal brackets.
I will look into this more closely; are there specific terms for this type of plastic?
Great idea, thank you!

Just try searching for liquid plastic.

We sourced it back then from a building materials supplier.