| Before setting out to buy mezuzahs you first need to | | | | should be installed without a blessing. |
| calculate the quantitiy needed. In most cases, any | | | | Gates of gardens and entrances to cities and |
| doorframe that leads to a room requires a mezuzah. | | | | countries need a mezuzah. |
| A room for this matter is a space not smaller than 2 | | | | The doorframe of a guard's hut at the entrance of a |
| by 2 meters, bordered by four walls. It can be a | | | | house does not need a mezuzah because it is not |
| corridor, hallway, or even a storage room. Doorframes | | | | intended for residence. Nor do an exterior staircase or |
| without a door (like passages between rooms, or a | | | | an animal pen. |
| staircase also need mezuzahs. | | | | A public bathhouse doesn't need a mezuza but a dairy |
| Toilets, bathrooms, and temporary rooms (like a | | | | barn, a chicken coop, a granary and a wine cellar do |
| sukkah) do not need a mezuzah. A storage room | | | | need. But some claim they don't. |
| which is located outside the house and is not smaller | | | | A house or a garden where a non Jew is also living |
| than two by two meters needs a mezuzah. If the | | | | does not need a mezuzah. |
| objects stored in the room are useful and people | | | | Horizontal doors set into the floor leading to a cellar do |
| frequently enter to take them out and use them the | | | | not need a mezuzah, only vertical, standing doors. |
| mezuzah should be installed with a blessing. But if the | | | | A house rented overseas, during a period of less than |
| storage room is very rarely opened the mezuzah | | | | 30 days, does not need a mezuzah. |