Historical building renovation - a challenge
The main difference here is that the integrity of the facade is not something you can choose to preserve or not - this is not the case when it comes to historical buildings.
Instead, as being by law protected, they need to stay as they are, but this does not cancel the need to make - from time to time - certain changes.
Salamander 76 may and upgrading protected sites
For instance, it's important since getting in the new windows may improve the paramteres of heat insulation, loss prevention, and so on, which may have a preservative influence on the interior.
Therefore, upgrades may be welcome and strongly recommended, but, regardless of that, only replacement windows will do, as they allow the changes to be made without deep makeovers, which are a no no.
For more detailed info on Salamander 76 Renovation 35 window profiles, keep reading here: