Just moved into a new apartment and it's clear the window sill on the outside is not in great. It looks like there's some wood covered with a weatherstrip of sorts. Now I know this is technically the coops responsibility to manage, but I'd like to manage some of this myself and make sure it's done right.
I don't have any pictures underneath the weatherstrip, but here's what the window looks like. This one is doing better than the others, but sharing as a reference on what I'm talking about: https://imgur.com/a/uS1NtNX https://imgur.com/a/6pRV100
The ones in question had rotting wood and the weatherstrips were also not doing well. Any advice on what I should do to best waterproof these windows? And what I should purchase if I'm DIY this myself?