Place the mezuzah on the right side of the doorpost as you enter the main room e g on the right side of the door as you enter your home on the right side of the door as you enter a bedroom etc.
Mezuzah on doorway.
Where the doorway is wide enough many ashkenazi jews tilt the mezuzah so that the top slants toward the room into which the door opens.
Any enclosed space that s at least 6 5 ft.
If these conditions do not exist a competent rabbi should be consulted to determine whether or not that entryway requires a mezuzah.
A doorway that requires a mezuzah is only one that that has two doorposts and a lintel connecting the doorposts on top.
Place the mezuzah on the upper one third of the doorpost.
This is done to accommodate the variant opinions of rashi and of his grandson rabbeinu tam as to whether it should be placed vertically rashi or horizontally rabbeinu tam and also to imply that god and the torah which the mezuzah symbolizes are.
This includes vestibules hallways large walk in closets etc.
It should be affixed to the doorpost on the right hand side of a person entering the room.
Bathrooms closets laundry room boiler room and so forth however do not require a mezuzah.
If there are several doorways leading into a room each doorway requires its own.
Ashkenazim place the mezuzah at a slant toward the main room.
What qualifies as a room.
A mezuzah should be fixed to the doorpost of ever living space in the house not just the entrance door.
It should go about 2 3 of the way up the doorpost and be affixed diagonally with the top of the mezuzah slanting in towards the house or the entrance of.
As long as a door can be used as an entrance and exit a mezuzah should be affixed to the doorpost.