This mounting screw for corrugated roofs from Van der Valk with the Van der Valk product number 774392 can be used to tighten the mounting bracket 747901 if the existing screws are unsuitable.

The screw is made of stainless steel and comes with a seal already installed.

The screw is available in three lengths: 110mm, 130mm, 150mm.

For detailed instructions click here

Click here to watch all installation videos for a better understanding of the Van Der Valk mounting systems and find the right system for your roof type.

You can also use the Van Der Valk planning tool to calculate your required components and you can view the installation instructions in the download section.

You can also consult our solar guide on common questions such as:

1. costs and income - Are solar installations in Switzerland worthwhile?

2. subsidies - Will my system be subsidized by the state?

3. steps to the solar system - Which individual points do I need to tick off?

And many more.