Mezuzah Laws Explained: Placement, Case, and Halachic Guidelines for Every Home

Question: In what type of case (holder) should a mezuzah be affixed?

Answer: The mezuzah should be placed in a case through which the Divine Name written on the mezuzah can be seen, provided the area is clean and there are no issues of immodesty.

There is discussion among authorities whether ideally the entire mezuzah should be visible, or specifically the Divine Name.

Additional Notes:
If one must perform an act involving uncleanliness (such as changing a baby) in front of the mezuzah and cannot avoid it, the mezuzah should be covered. However, one should never regularly perform disrespectful acts near a mezuzah, even if it is covered.

It is proper to maintain cleanliness within four cubits (approximately 2 meters) of a mezuzah. One should also avoid placing garbage near it.

Question: Where should a mezuzah be placed on a wide doorway?

Answer: It should be affixed at the beginning of the doorway’s width, within the handbreadth closest to the outside.

Even if it was placed differently, it is still valid as long as it is within the doorway itself, but ideally it should be corrected to the proper position.

If the mezuzah is large, it may be placed at a slight angle so that it remains within the correct area.

Question: When affixing a mezuzah, which direction should the beginning of the scroll face?

Answer: The beginning of the scroll should face outward, toward the entrance space — not toward the wall.

Ideally, the Divine Name should also face the entrance, even if the mezuzah case is not transparent.

Question: Can the plastic wrapping that held a mezuzah be thrown away?

Answer: No. It must be respectfully stored (genizah), as it served a sacred purpose.

If there were two layers of wrapping, only the inner layer requires genizah, provided the outer one was not specifically for honoring the mezuzah.

Question: Is there an obligation to place a mezuzah at the entrance to a shared stairwell?

Answer: Yes. It is a full obligation on all residents of the building. In many cases, this obligation is even stronger than for certain rooms inside one’s home.

Many people err when moving into a new building and leave the stairwell entrance without a mezuzah for days or even weeks.

If the stairwell does not meet minimum size requirements or lacks a door, a mezuzah should still be placed — without a blessing.

Question: How often should the mezuzot in a shared building be checked?

Answer: They should be checked twice every seven years, like private mezuzot.

In practice, this means approximately every three and a half years.

Important Insight:
A person fulfills the mitzvah of mezuzah every moment it is properly affixed. Conversely, neglecting it means missing a constant Torah obligation.