Substructure for terrace

But they are thinner. And the OP wants (must?) the same final installation height.

Then you could also remove the gravel, put a bit of crushed stone on it, compact it again, and put a bit of gravel on top again. I would also find it pointless to redo it completely, at least based on the information we have.

I consider laying porcelain stoneware slabs on gravel to be a mistake ... but well, each to their own.

Hello everyone, thanks for the many contributions. I just measured again in two places, there are about 10 cm of gravel under the slabs. Since the new ones are thinner, an additional 2 cm would be added to compensate. So, in the end, there would be about 12 cm under the FSZ slabs. The landscaper said the slabs might be more likely to slip then. I also have to say that this has now happened to us with the concrete slabs as well, but it could also be because the soil settled again at the edge. : just a personal opinion or are there concrete arguments behind the statement?

Here are a few statements from the internet (not from forums) but from garden landscaping pages:


Laying on gravel or grit. The gravel must be piled up about 20 cm. Gravel or grit is suitable for this type of installation. A minimum slope of 2% is necessary here to ensure water drainage.

Or:

Porcelain stoneware terrace slabs of about 2 cm thickness combine the appearance of natural stone, concrete or wood with the durability of porcelain stoneware and are thus the ideal terrace covering. Visually, the porcelain stoneware tiles are almost indistinguishable from the natural materials they imitate and at the same time are frost-resistant, slip-resistant, scratch-resistant, UV-resistant and require only minimal maintenance and cleaning effort.

Due to their high own weight, these terrace slabs can be laid loose in grit, drainage mortar or on a solid base also with loose laying on pedestal supports.

Let him just add 2cm of fill and level it out... what could possibly happen? Don’t fall for the nonsense about the removal... this is just a scam aimed at making money...

Dangerous ignorance!!!

Considering the atv the 18318, the bedding in a compacted state should be at least 30, at most 50 mm!

Here are a few statements from the internet (not from forums) but from landscaping pages:


Laying on gravel or chippings. The gravel must be piled up about 20 cm. For this type of installation, gravel or chippings are suitable. A minimum slope of 2% is necessary here to ensure water drainage.

Or:

Porcelain stoneware patio slabs about 2 cm thick combine the look of natural stone, concrete, or wood with the durability of porcelain stoneware and are therefore the ideal patio covering. Visually, the porcelain stoneware tiles are almost indistinguishable from the natural materials they imitate and at the same time are frost-resistant, slip-resistant, scratch-resistant, UV-resistant, and require only minimal maintenance and cleaning effort.

Due to their high own weight, these patio slabs can be laid loose on chippings, drainage mortar, or on a firm base also loose laid on pedestal supports.