ᐅ Flat roof without parapet wall

Created on: 29 Feb 2016 21:11
J
jochi79
Hello everyone,

I have a question for all the legal experts:

We recently received approval for a plot of land in southern Germany near the beautiful Lake Constance. According to the development plan, the building must have a flat roof with two full stories, and a maximum height of 6.90 meters (22.6 feet).

In our neighborhood, there is a relatively new house with a very shallow, single-sloped roof with a pitch of about 6°. Since I have read on various sites that a flat roof is defined as having a pitch up to 7° or 9°, I am now wondering whether such a house would be allowed to be built.

Basically, it would be a flat-roofed house but without a parapet, meaning the roof slope would be visible.

Can someone help me with this?

Thank you very much
11ant18 Jan 2018 17:55
So, for a parapet-enclosed shed roof with a slope of ten degrees or more, I would consider rejection reasonable. I don’t see the parapet as essential, but the rather symbolic slope is. I don’t consider a small overhang (albeit only on the gable side) or conventional rain gutters to be harmful in terms of achieving the aesthetic goal of a “flat roof.”

Perhaps you have already read my general mantra here: never force a contractor to use techniques, constructions, or materials they are not experienced with. This applies especially to flat roofs.
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K
Knallkörper
19 Jan 2018 09:44
The so-called flat roof guideline states that a flat roof should be designed with a minimum slope of 5° to ensure reliable rainwater drainage. There is no upper limit specified. Maybe this information helps.