Once you have selected a Mezuzah Case and parchment scroll the hanging of a Mezuzah is an event for joy and celebration. Aside from a Prayer Book containing the blessing for the placement of a Mezuzah Case, the materials you will require are 2 small nails and a hammer if the door frame is made of wood. For metal or glass door frames or Mezuzah Cases made from glass or ceramics you will need double sided tape or strong transparent glue.
The proper side of the door frame is the right side, the side you face as if to enter the house or room. The key to choosing the correct height for the placement of a Mezuzah is the height which accommodates the majority of people using that entrance so they can participate in the Mitzvah of reaching the Mezuzah by hand and kissing it.
The average height for placement of the Mezuzah case is generally two thirds of the height of the door way from the bottom, a position that is comfortably reachable by most men and women, or for children reaching out at full arms length. For small children, it is possible to lower the height of the Mezuzah for their benefit as is commonly done for children’s bedrooms.
The occasion of affixing a Mezuzah should be carried out with joy and it is customary to invite relatives and friends to attend if one is entering a new home or office. Even if the occasion is limitedly celebrated by those who are to live in that home, refreshments should be served to mark one’s fulfillment of the Commandment to affix a Mezuah.
Ideally, it is best for the head of a household to make the blessing personally, but it is perfectly acceptable to honor a special person or religious leader to affix the Mezuzah and to make the blessing. The following blessing should be made when affixing the Mezuzah Case to the door post,. “Blessed are you O’ L-rd our G-d, King of the Universe who has sanctified us with his commandments and has commanded us to affix a Mezuzah.