ᐅ Terrace construction above an unheated garage

Created on: 13 May 2025 10:31
T
turhanet
Hello everyone,

We have had several contractors on site by now, but unfortunately, we have not yet found a satisfactory solution. Unfortunately, we only have a construction height of 15cm (6 inches) from the unfinished ceiling to the sliding patio door. Adding to the challenge, I use a wheelchair, so the transition from the sliding patio door to the terrace must be barrier-free. The garage beneath the terrace is unheated. We want to prevent any condensation from forming on the garage ceiling and ensure that the terrace is properly drained. For the flooring, we are considering terrace slabs with a thickness of 2cm (0.8 inches).

I have created the following sketch for this.

We would be very grateful for any ideas.
Grundriss: Gelbes Haus links, grüne Wiese unten, blaue Fläche mit braunem Rand; 10m, 6,2m.
W
wiltshire
13 May 2025 18:58
turhanet schrieb:

@Nida35a unfortunately, there is no slope on the garage roof
What solutions are there for draining water on the roof?

About the material:
Wood or WPC (wood-plastic composite) does not have a fundamental advantage over tiles, except possibly the lower structural load it creates. Many people doubt the durability of wood, which could be considered a disadvantage.
A
Arauki11
13 May 2025 19:35
One more time the question: Has the garage roof/flat roof not been waterproofed at all so far?
How has the rainwater drainage been managed up to now?
T
turhanet
14 May 2025 20:18
Hello Arauki11, until now it has not been sealed. We made a hole in the wall where the water then flowed into a downpipe.
A
Arauki11
14 May 2025 22:22
But a flat roof garage would need to be waterproofed in some way anyway. In that case, you could install a screed with a slope underneath and then place pedestals with any kind of surface on top of the waterproof membrane (foil). Maybe you could upload 1 or 2 pictures.
H
hanghaus2023
15 May 2025 09:29
Is this a boundary garage?

If you drilled a hole in the wall (parapet?), there is probably a slope leading there.

Pictures really help.