Today I restored the window I started with yesterday as much as possible. The damage was mostly superficial, and I removed that what was rotten and replaced it with that what is new.
Like in real life the damage was worse where the window was most exposed to the environment and it’s lingering influence. Like a bad look or underhand remark water seeps down and crawls into narrow crevices where it slowly eats itself further inside.
This time we were lucky, the window was made of good quality wood and though it lived it’s whole life on the weather side it did well. I have to say that it didn’t help that later in life someone used modern sealant to prevent more water from coming in but this also prevented the already trapped water from ever moving out again.