Create a base slab for the terrace afterwards

Hello,
at our single-family house completed in 2007, we want to add a terrace roof. We want to keep the option open to enclose the three sides at a later date.
Currently, the terrace is bordered by a strip foundation, on which granite cubes are placed as edging for the 4cm concrete slabs.
The problem arises from the fact that about 1.8m was filled under the terrace (with the excavation from the basement). So far, the ring beam has only settled by 1cm, but it is hard to predict if it will stay that way.
If we were to place a conservatory on the ring beam now, and it settles over the years, that would certainly be bad for the conservatory.
Therefore, we want to remove the material within the ring beam and pour a slab.
The following procedure:
Remove terrace slabs, gravel, and crushed stone.
On the front side of the terrace (parallel to the house wall, bordering the lawn), three point foundations approx. 2m deep will be installed.
Drill from the outside through the wall into the basement ceiling and glue in reinforcement steel bars.
Insert two layers of reinforcement mesh and tie them with the bars in the house wall and the point foundations.
Pour the slab with concrete.

Now to the questions:
1) What do you think of this approach, what is good, what is bad, what would you do differently, what exactly like this?
2) Gluing the reinforcement bars into the basement ceiling leads to a thermal bridge, right? How is this usually done otherwise?

I look forward to your input and an lively discussion.

manello01

We had a similar situation in the past. However, during the shell construction stage, we stacked bricks directly against the basement wall and then used these as an additional support. Otherwise, we did it exactly the same way. I am absolutely sure that the ground would settle. After 30 years, we had a hollow air space of 30-40cm beneath the concreted floor slab of the terrace, even though it was compacted thoroughly and properly. For example, at the house entrance, we had a concreted path about 1m wide, which we later paved. However, we made this paving 2m wide, and exactly at the edge you could clearly see the difference after a few years; it had settled, even though there was natural soil there. All the neighbors had some settling under their paving, so for me, the only option is a concrete slab or support on such foundations.

Pour slab with concrete.

Keep in mind how you will get the concrete onto the terrace (behind the house??).

Consider how you will get the concrete onto the terrace (behind the house??)

Thanks for the tip. It does involve a lot of work, but it is doable.

Thank you for your contribution. I also believe that a concrete slab is safer.

Hello manello01

The floor slab is ok, the foundations should be too. But why do you want to connect the slab to the house?
It only makes it unnecessarily complicated. The minimal movement of the house against the floor slab should be absorbed by the profiles of the [Terrassenüberdachung].

Steven