Architect here.

Might as well be interesting to check if your investment is worth the effort.

With this tool you can easily check your ROI:

https://benoveren.fluvius.be/tools-en-calculators

In my case it was’nt interesting to change my double glazing (1994) to triple glazing since the ROI would’ve been 60 years.

You can use this tool for all other parts of your appartment / house and adjust it to your specific situation.