|Ask Rabbi Lerner|
I have recently bought a home from a non-Jew and will be moving in January. Do I affix the mezzuzah before or after I kasher the home? I plan on staying in the home during the painting, carpeting and kashering processes.
As soon as you take possession of the home and there is no danger of the
mezuzot being damaged, for example being painted over on the door-post as
the house is readied, put them up.
Remember that you should be purchasing mezuzot from a reliable Judaica dealer - too many are selling paper, xerox copies, silk screen copies, etc. When in doubt speak with your Rabbi for guidance.
In general, the mezuzah is placed on the right-side door-post on the way into the house/room, at a 45 degree angle. Your Rabbi can provide the appropriate berakha and give guidance on how many mezuzot you need beyond all of the external doors. You don't put one on the door to inappropriate places, e.g. bathroom.
Rabbi Barry Dov Lerner
Foundation for Family Education (FFFE)