The Origin of the Mezuzah

The origin of  Mezuzah comes from the Bible. In the book of  Devarim-Deuteronomy 6:9  it is written :"Write them on the doorposts of your house and on your gates".

This commandment asks every Jew  to place a Mezuzah on each and every doorstep. In every room except for the bathrooms and toilets.
The reazon of placing a  Mezuzah  is based upon  the Jewish tradition that the Mezuzah take care for the home and the people inside it.
It is important to check the Mezuzah  if there is a reason to believe that a problem resides in the house. We check the Mezuzah in order  to see if it's not defected.

According to the Halacha one needs to check the Mezuzah every couple of years; For that same reason - it is  important to buy Mezuzah parchments that have gone through a specialists that checks the parchment for defects.

 The Mezuzah has two Parshiot written on it: Shma Israel and Ve-Haya im Shamoa tishmeu. It is Written over 22 lines on a small parchment. Since the writting is small and is layed outside the house it is common that defects are found and the parchment needs to be replaced.