Substructure for terrace

  • Erstellt am 2016-06-21 22:05:06

Andreas2001

2016-06-21 22:05:06
  • #1
Hello everyone,

our house is now 6 years old and we want to replace the terrace slabs (at that time we had simple concrete slabs laid for cost reasons). Now there should be porcelain stoneware tiles on it. A landscaper took a look at it and also checked under the slabs. He found that the layer of grit is quite thick, about 8-10 cm at the inspected spot. Below that was the gravel, no idea how thick that is, maybe this layer is thinner.
The landscaper advises us to remove and redo the substructure because too much grit was used. Since the new tiles are about 2 cm thinner, in addition to the 8-10 cm, there would be 2 cm of grit on top, so it would then be about 10-12 cm.
Is that really too much? Why is that a problem??
 

matte

2016-06-21 22:38:02
  • #2
Huh? He says 8-10cm of gravel is too much, so he adds 2 more on top? Something's not right...
 

One00

2016-06-22 07:21:31
  • #3
No, he means he would have to add an additional 2cm due to the lower material thickness of the porcelain stoneware to reach the current height. And that would be way too much. That's why new.

However, if this could be a problem, I would always ask the person who claims it is one. I can only speculate: unlike crushed stone, grit cannot really be compacted. Presumably, the risk that the porcelain stoneware breaks is too high. Just ask him.
 

Mycraft

2016-06-22 09:15:33
  • #4
Let him just pile up 2cm and level it... what is supposed to happen? Don’t get involved with the nonsense about the distance... here they are trying to swindle and just want to make money...
 

Payday

2016-06-22 11:02:41
  • #5
these thin porcelain stoneware slabs can just break easily. the substructure really has to be level so that no breaking edge forms. the easiest method would actually be to choose nice new slabs in the same material thickness as your current slabs and replace them 1:1. remove old parts, smooth out, and place new ones on top. the stuff has already been compacted over the years anyway. if you start throwing anything in or out, everything has to be realigned. the pure replacement could also be managed by yourself with 1-2 strong friends (the slabs are heavy).
 

Mycraft

2016-06-22 11:08:18
  • #6
That's exactly what I'm talking about... just take out the old boards... straighten them... and put new ones on...
 

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