Hello dear forum members,
We are building a house with a developer and are close to the handover.
We noticed that there is about 4-6 cm (1.5-2.5 inches) of standing water on almost the entire surface of our garage roof. A gutter was installed behind the garage, and roofing felt was applied on the roof by the local roofer.
It is obvious that the rainwater cannot flow into the installed gutter because the surface slopes upward toward the end.
We raised this issue with our developer and were dismissed with the following response: Quote, "The roof is going to be greened anyway, or you can put gravel on it—then you won’t see the water. And when it rains enough, the highest point will be exceeded, and the rainwater will flow into the gutter."
We were very surprised by this reply and rather believe that there is a defect in the execution or in the purpose of the gutter, which currently is not fulfilling its function.
Furthermore, the contract states that the downpipe should be routed internally, which was not done. Regarding this point, our developer responded as follows: "During the construction process and coordination with the roofer, we decided on a gutter. Since this represents a minor deviation, we did not inform you."
BANG!!
Is anyone here able to help us? To clarify, I have attached a few pictures.
Thank you in advance for your responses!!




We are building a house with a developer and are close to the handover.
We noticed that there is about 4-6 cm (1.5-2.5 inches) of standing water on almost the entire surface of our garage roof. A gutter was installed behind the garage, and roofing felt was applied on the roof by the local roofer.
It is obvious that the rainwater cannot flow into the installed gutter because the surface slopes upward toward the end.
We raised this issue with our developer and were dismissed with the following response: Quote, "The roof is going to be greened anyway, or you can put gravel on it—then you won’t see the water. And when it rains enough, the highest point will be exceeded, and the rainwater will flow into the gutter."
We were very surprised by this reply and rather believe that there is a defect in the execution or in the purpose of the gutter, which currently is not fulfilling its function.
Furthermore, the contract states that the downpipe should be routed internally, which was not done. Regarding this point, our developer responded as follows: "During the construction process and coordination with the roofer, we decided on a gutter. Since this represents a minor deviation, we did not inform you."
BANG!!
Is anyone here able to help us? To clarify, I have attached a few pictures.
Thank you in advance for your responses!!
hanghaus2023 schrieb:
What exactly does the construction specification and the plan say about the roof design? Regardless of what is stated, a flat roof must have a slope. This has nothing to do with green roofing at all.
S
Sonneneck21 Dec 2023 13:05J
jens.knoedel21 Dec 2023 13:18By the way, there is a flat roof guideline or a DIN standard that requires a minimum slope of 2%. A slope of 5% is recommended. Therefore, there is an obvious defect, as the construction does not comply with the current state of technology.
Exception: green roofs with ponding water drainage – but you neither purchased nor received this.
Exception: green roofs with ponding water drainage – but you neither purchased nor received this.
H
hanghaus202321 Dec 2023 13:23@OWLer the description could mention something about the green roof. Some development plans / building permits require it.
hanghaus2023 schrieb:
@OWLer The description could include something about the green roof. Some zoning plans do require that.Well, the uploaded excerpt doesn’t mention anything like that, and I imagine the implementation would be difficult since there’s a gutter at the front – basically, I would need a continuous parapet or something similar to prevent the granulate/ gravel, etc., from eroding and washing off the front.Similar topics