Opaque terrace roof that can be opened

arf may I ask which sail you are using? For example, there are significant differences in price...

You can choose one of the many providers online. They all cut to size, fabrics can be selected based on quality, properties, and color. Then have stainless steel posts made locally by the locksmith. With self-installation, the price for 4x4m should currently be around +/- 1,000 €. We had such a sail at the penultimate house. I can post a photo sometime.

The best is and remains the lamella roof

The best is and remains the slatted roof

Is that advertising or what?

No advertising but currently the best sun protection [dens] available on the market.

Friends of ours have a pergola awning. A fixed frame on 2 supports and a fabric awning that can be extended/retracted in one piece. It looks modern and can be quickly retracted in case of storm/snow...

Our terrace faces south. Therefore, the awning would probably be extended almost all the time in summer. That’s why I wonder if there might be alternatives.

One more question: How often is a glass roof usually cleaned?

I believe slats are more expensive