Renew garage roof independently

You can also use sandwich panels, about €30 per sqm and they are also available in different colors. I wouldn't want to use Eternit.

We only considered Eternit because it also has to go back on the house roof, since tiles are too heavy. I'll take a look at it, thanks.

I would have kept it simple with the trapezoidal sheet. For the sides, you choose a nice board of your choice. It can also be painted in any color if desired. You can't beat the price/performance.

Instead of trapezoidal sheets, there are also metal roof tiles, which then look like bricks. They come in different shapes and colors. Can you even see the house roof and garage roof together (usually garage roofs are sloped backwards, so you don't see them from above anyway). On the sides, verge flashings are attached, which always match accordingly.

Better use wood boarding and seal with 2 layers of roofing felt ;)