How important is the "traditional" roof in times of photovoltaics?

In my conviction, a module does not need to have a "double bottom," but rather be able to fully take over the job of the roof membrane.

But almost no one can do that yet. Show an example of a good solution with standard modules.

That has hardly been possible until now. Show an example of a good solution with standard modules.

That's how it is. They are a rarity, thanks to the failures of Bangemann to Rexrodt, which are coming back to haunt us today. In 2040, we will then buy back the Transrapid, poor Germany. Let’s hope the market will fix it.

What does it mean then that they are "checking" the construction project?

Yes, at the moment it is about clarifying some details in which the development plan is somewhat unclear before the building application is submitted (roof geometry, buildable area, etc.). P.S.: 27/09 - I want to build a roof, not a runway.

P.S.: 27/09 - I want to build a roof, not a runway.

Answering the follow-up question of how south your southern orientation actually is could still be helpful.

Yes, currently it is about clarifying some details in which the development plan is somewhat unclear before the building application is submitted (roof geometry, buildable area, etc.).

This should possibly be clarified in the preliminary building inquiry, i.e. not before service phase 4, but before service phase 2, because it already influences service phase 3.

Simple answer deviation from S in degrees.

Almost no one can do that so far. Show an example of a good solution with standard modules.

This summer I installed a "Viridian" in-roof system with 44 modules with/at acquaintances. The system is well thought out and in my opinion 100% watertight. The panels are mounted directly on the battens and the panels are connected with sheets that are inserted into a rubber lip on the module.

Nevertheless, I see three disadvantages:
1. Ventilation:
When roofing, it was noticed that the air under the panels heats up enormously and a significant chimney effect occurs. Some of the hot air certainly escapes through the row of tiles above and the ridge vents, but certainly not as much as with panels in a "classic installation."
2. Thickness of the solar panels:
The panels feel thin, no idea if they could withstand hail.
3. Replaceability of individual modules:
Due to the sheet metal connections, the panels must be installed and accordingly removed in a certain order. Replacing individual defective panels is only possible with extreme effort.

I am really curious about the long-term experiences.