We have for some time smoking neighbors and the hallway stinks frequently simply times brutally by a mixture of smoke and the other very unpleasant body odors and apartment. This mixture attracts naturally gladly upward to the second floor to the roof and under our front door through. Since both landlord ("I can do nothing, who pay rent on time") as well as neighbors are extremely resistant to advice on the subject, we had to act naturally. The nice thing about this stop is that you can fix it on the door and it just is not only a role, which is placed in front of the gap.
Long story short: If you manage cuts the part properly, one can achieve a felt 95% impermeability, so we now just have to hold your breath, if we use the stairwell but not if we put on ourselves the jackets in the apartment hallway ,
The corresponding neighbors the way to 1.5. terminated, fortunately.
