When I was calling the agency a couple during the last few weeks, each time I was said that they sent a request to some windows company and waiting for their response
It's inside, if you touch wooden casements it feels like they are empty inside also looking Ok. The specialist said no wood left to repair
The real state is not obvious from just look of the windows. The viwing took place on a warm day and there was no draughts when I tried to put my hand near the glass.