How to lay tiles on rubble on a terrace?
This will be a terrace facing a corner (southwest terrace) of about 90 square meters. The description of the house (construction work) includes a gravel backfill that ends about 20 cm below the finished terrace height, which gives me an opportunity to install crushed stone or something similar. I would like to lay 90 x 90 tiles 2 cm thick.
Is this possible on gravel and do I need so-called spacers or hub bearings?
A tiler we trust advises against rubble and recommends using support posts. The reason for this is probably because large tiles tend to stick together.
We have split bearings, so the tiles don't sound hollow like they do with leg bearings.
You can do it no problem, but seal it properly first.
Is this possible with a 90 x 90 tile and only 1 cm thick or does the tile have to be a certain thickness?
In my opinion, crushed stone is only meant to level 3 to 5 cm. If your builder is building a 20cm house, you will have to fill in about 12cm of gravel in between or build the house directly above. A thickness of 1 cm breaks down too quickly. 2cm is the standard.
I have no experience (yet) myself. However, I have been advised to use at least 3 cm thick slabs for paving. Slabs that are 1 cm thick have to be glued together.
I would also recommend a thickness of 2-3 cm. They hold up better due to their own greater weight.