I am living in an old (renovated) flat which size 25 m2 in Riga. However, there is the wind feeling all the time. There is very bad isolation in the corridor. In my apartment, there is no isolating door between two rooms.
This apartment is not my apartment so I am not going to invest much to it.
What is a good way to decrease to amount of windy feeling in the apartment? Some Chinese curtains or something isolating material in front of the window?