Flat roof renovation alternatives - Gable roof for more living space?

Good evening,

in 2004 I had my flat roof - bungalow built in 1980, flat roof as a cold roof in wooden construction, covered with roofing felt - reroofed, the costs were about €6,700 for approximately 200 sqm of roof area.

Since I still have to check it every year, I am thinking about having a roof truss for a gable roof or hipped roof with regular roof tiles built for the next scheduled renovation instead. It is definitely not about additional living space, but purely about the type of roof covering.

Of course, this requires a building permit etc., which should not be a problem nowadays. A structural engineer is certainly also necessary.
Above all, the drainage would have to be solved, since there are currently two sewage pipes in the middle of the flat roof.

Does anyone have experience with this?
Would it be energetically beneficial?
What costs can I expect approximately?
Are there other alternatives that are more reasonable?

Thank you in advance!

S. Zimmermann

Costs 50k and up. Never count on it. Alternative is to keep [FD].

When it comes to the appearance, a metal roof can also look good, there are elements that are visually indistinguishable from tiles, but much lighter. Otherwise, there could possibly be problems with the statics if the construction is planned with a "light roof".

Best regards from Munich :) The costs are of course always hard to estimate, but you can definitely apply for funding from the KfW! We did that back when we renovated our house and got an energy consultant for it, because without one you actually can't apply for the funding. Just take a look around and better contact a professional, it saves money in the end! I can recommend Eveecon, they have a large network of consultants.