Foot point - how waterproof is it? Who has experience with it?

Does the base of the wall also withstand standing water after heavy rain?

Due to the location of our house, it could be that the base of the wall (construction joint between the shell concrete floor slab and the floor structure) is underwater for about 2 hours at approximately 7 cm during extreme rain (maybe every 5 years). It cannot rise any higher because then it would run off over the street crown. Unfortunately, we are not allowed to build the house higher.

Therefore, our questions:

1. Does this construction joint withstand this standing water (about 7 cm above the joint, for about 2-3 hours)?

2. And what about the sealing of the floor-to-ceiling doors/windows, can they withstand this as well?

Our house is a standard house from Town & Country, without a basement and simply plastered from the outside. Or mineral sealing slurry in the plinth area.

Thank you very much for your help!!

From personal experience, a front door only holds back pooled water to a limited extent; eventually, the water finds its way through the door into the interior of the house.

From personal experience, an exterior door only holds back accumulated water to a limited extent; eventually, the water finds its way through the door into the interior of the house.

Do you mean the base of the door, that is, where the door meets the unfinished floor slab? (Approximately 16 cm below the finished floor level)

Water cannot rise above the finished floor in our case. However, the question is how long this base sealing will last before water seeps between the unfinished floor slab and the floor construction (insulation, screed, etc.).

Can anyone help?

I don’t know. But professionally, shouldn’t it be done so that you don’t just stick it onto the house, but rather lay a gravel strip with drainage underneath, so that it doesn’t rise but is drained away? Like this.

Depending on the execution, this can work. However, sealing must have been done during manufacturing against permanently pressing, accumulated water. In the simplest case, only the worst-case scenario "Bodenfeuchte" is taken into account.

You therefore have to look at the planning at that time. Everything else can only be determined with a functioning crystal ball.

In the simplest case, only the load case "soil moisture" is considered.

If it was sealed only against 'soil moisture', would the seal then be immediately leaky and not even hold back the ponding water for at least an hour or so? The ponding height above the joint would be only about 7 cm.