Securely store terrace slab over cavity

  • Erstellt am 2025-08-09 21:12:36

BenitoHo

2025-08-09 21:12:36
  • #1
Hello everyone,

our terrace should (as is the case with most nowadays) be level with the terrace exit. However, due to certain problems, which I do not want to go into in detail here, there are spots where I cannot fill up to this level with gravel and grit.

After considering and calculating various solutions, the most practical (or rather affordable) solution for me is to set deep curb stones at a certain distance (20 to 30 cm) from the wall, so that the gravel/grit does not reach the wall, and to let the slabs run over these (height will of course be taken into account, etc.).

Now I still have a question about how to ensure that the slabs lie securely over this cavity and do not tip, preferably permanently. I have already seen that this problem apparently always exists with prefab houses and that there are special grated solutions for this (which I do not need and which are therefore too expensive). However, I have not yet found a solution for the support of the slabs. That’s why I have already considered simply getting angle brackets for grating (an example can be found under the name Winkelkonsole Typ 3 for grating width 300 mm) and cutting off the protruding nose on the back so that the slab can simply extend all the way.

However, these are also very expensive, which makes me wonder whether proper heavy-duty brackets (suitable for outdoor use) might also do.

Do any of these solutions sound reasonable to you, or are there completely different suggestions and ideas? This issue is driving me a bit crazy and is seriously holding up the whole terrace project, which the kids don’t like at all ;-)
So I would be grateful for any suggestions!

Additions due to inquiries:


    [*]This is a traditional masonry house, not a prefab house; I mentioned the prefab house only because there are special solutions for bridging this gap which are tailored to the specific requirements of prefab houses.
    [*]The trigger for the workaround I planned lies with the plaster, which was applied too low. Otherwise, I would simply heap the gravel up to the structured base plaster, and there would be very little base plaster left above the slab.
    [*]The substrate is a load-bearing layer of gravel and I can properly concrete in the edging stones, which is no problem.
    [*]A 20 cm distance would be quite sufficient, and there is ventilation in some places as well.

Any further questions that help with the solution are always welcome.

Best regards
Benito
 

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