Seal the window airtight

The thread creator's question is 5 months old!

I noticed that, but I still thought it made sense to respond.

There is no point in discussing it now, because it is surely already resolved (otherwise he would have contacted us again).

For me, it does make sense to reply, because I don't like to let statements like the one about the "airtight mounting foam" stand unchallenged...

Also, a construction project does not necessarily end with the acceptance of the building, since defects that may occur are subject to repair at least during the warranty period...