Hi! Will try to keep it brief. Basically we own a downstairs flat. Upstairs is rented out but not maintained. Every time it rains, the rotten windows upstairs allow water to run through the wall cavity. As a result our coving is falling down, our plasterwork and carpets are ruined and our flat stinks of damp. After two years of chasing the owner to make proper repairs this is really getting us down. There is no management committee and our insurers say they cannot force the owner to make repairs. Help?