How to Hang a Mezuzah: A Practical Guide for Every Doorpost

More Than a Decoration

You have probably seen them — those small cases affixed to the doorframes of Jewish homes, synagogues, and offices. Some are ornate, hand-painted ceramic. Others are sleek, minimalist metal. Some are so discreet you might walk past without noticing. But the case is just the housing. What matters is inside: a small parchment scroll inscribed by hand with two passages from the Torah, containing the words of the Shema — the most fundamental declaration of Jewish faith.

The mezuzah is one of the most visible markers of a Jewish home. But affixing it correctly — which doors, which side, at what height, at what angle — involves a body of halakha (Jewish law) that is both precise and practical. This guide will walk you through it.

The Biblical Source

The commandment comes from Deuteronomy 6:9 (and again in 11:20): “And you shall write them on the doorposts of your house and on your gates.” The “them” refers to the words of the Shema, the declaration of God’s unity and the commandment to love God with all your heart, soul, and might.

The mezuzah parchment contains two passages: Deuteronomy 6:4-9 and Deuteronomy 11:13-21. These must be written by a qualified scribe (sofer) on genuine parchment (usually deer or cow skin), with special ink, in a specific script. A printed mezuzah, a photocopy, or a mezuzah written by someone untrained is not valid. This is one area where authenticity matters enormously — buy your mezuzah from a reputable source.

Which Doors Need a Mezuzah?

The general rule: any doorway with two doorposts and a lintel (the horizontal piece across the top) that leads into a room used for living requires a mezuzah. In practice, this includes:

• Front door — Always. This is the primary obligation.
• Bedrooms — Yes, including guest bedrooms and children’s rooms.
• Living room, family room, den — Yes.
• Kitchen — Yes.
• Dining room — Yes.
• Home office or study — Yes.
• Garage — If it is enclosed and used regularly (as a workshop, gym, etc.), many authorities require a mezuzah.
• Basement — If it has finished rooms used for living, yes.

Doors that do NOT need a mezuzah:

• Bathrooms — Exempt, because the sanctity of the scroll is incompatible with the function of the room.
• Very small rooms — A room smaller than 4 amot by 4 amot (approximately 6.5 x 6.5 feet, or about 36 square feet) is generally exempt.
• Doorways without a proper frame — An archway or open passage without two distinct doorposts may be exempt (consult a rabbi for specific cases).

Debated cases:

• Walk-in closets — Large closets (big enough to use as a small room) generally require a mezuzah, though customs vary.
• Laundry rooms — Usually require a mezuzah if they have a proper doorframe.
• Porches and balconies — Often require a mezuzah if enclosed.

Which Side?

The mezuzah goes on the right side as you enter the room. “Right side” is determined by the direction of entry — the side that is on your right when you walk in.

For the front door, this is straightforward: the right side as you enter the house from outside. For interior doors, you need to determine the primary direction of entry, which is usually from the hallway or common area into the room. If there is genuine ambiguity (a pass-through between two equal rooms), consult a rabbi.

At What Height?

The mezuzah should be placed in the upper third of the doorpost — not at the very top, but in the upper one-third of the doorframe’s height. It should be at least one handbreadth (tefach, approximately 3-4 inches) below the lintel.

For a standard 80-inch (203 cm) doorframe, this means the mezuzah should be placed at approximately eye level or slightly above — roughly 60-66 inches (152-168 cm) from the floor.

The Angle Debate

Here is where one of the most charming halakhic compromises in Judaism comes into play.

Rashi (11th century, France) ruled that the mezuzah should be placed vertically — standing upright on the doorpost.

Rabbenu Tam (Rashi’s grandson) ruled that it should be placed horizontally — lying flat across the doorpost.

The Ashkenazi solution? Tilt it at a diagonal — the top angled inward toward the room, the bottom angled outward. This compromise position honors both authorities simultaneously. It is neither fully vertical nor fully horizontal but a graceful split of the difference.

Sephardi custom generally follows Rashi’s opinion and places the mezuzah vertically. Both practices are valid.

The Blessing

When affixing a mezuzah, you recite the following blessing:

Baruch atah Adonai, Eloheinu Melech ha’olam, asher kideshanu b’mitzvotav v’tzivanu likbo’a mezuzah.

“Blessed are You, Lord our God, King of the universe, who has sanctified us with His commandments and commanded us to affix a mezuzah.”

If you are putting up multiple mezuzot (the plural) at the same time — which is common when moving into a new home — you say the blessing once before affixing the first one (usually the front door), and it covers all of them.

When You Move In

The obligation to affix a mezuzah begins immediately when you move into a home in Israel. In the Diaspora, the tradition gives a 30-day grace period — you have up to 30 days to put up your mezuzot after moving in. Many people, however, put them up right away, often making it part of the moving-in ceremony.

The act of affixing the mezuzah to a new home is a meaningful ritual moment. Families often gather at the front door, the blessing is recited, the mezuzah is nailed or screwed into place (or mounted with double-sided tape or Velcro, which is also acceptable), and the new home is officially sanctified.

Checking Your Mezuzah

A mezuzah is not a “set it and forget it” object. The parchment inside is organic material — it can be damaged by humidity, heat, cold, insects, or simply age. Even a single cracked, faded, or touching letter can render the scroll invalid.

Jewish law requires that a mezuzah be checked by a qualified sofer twice in seven years — approximately every three and a half years. The sofer will unroll the parchment, examine every letter, and verify that the scroll is still kosher. If it is damaged, it may be repairable; if not, it needs to be replaced.

Some people check their mezuzot more frequently — annually, or whenever something seems to be going wrong (a folk custom, though not a halakhic requirement). At minimum, if you suspect water damage or if the case has been knocked or broken, have the parchment checked.

When You Move Out

If you are moving out of a home and another Jewish family is moving in, you should leave your mezuzot in place. Removing them would deprive the next residents of the mitzvah. If a non-Jewish family is moving in, the custom is to remove the mezuzot — out of concern that the sacred scrolls might be mistreated or discarded.

If you are renting, the landlord may have opinions about holes in the doorframes. Adhesive mounting strips and specialized mezuzah holders can resolve this without damaging the property.

The Custom of Touching

You have probably noticed people touching the mezuzah as they pass through a doorway — some touch it and then kiss their fingers. This is a widespread custom (not a requirement) that serves as a physical reminder: every time you enter or leave a room, you pass by the words of the Shema. The touch says: I notice. I remember. The declaration of God’s unity is literally on my doorpost, and I am not walking past it unaware.

For children, touching the mezuzah often becomes a beloved habit — a small, tactile connection to Jewish identity that requires no explanation and no argument. It is simply what you do when you walk through a door.

Start With the Front Door

If you are new to the practice, start with your front door. One mezuzah, one blessing, one declaration that this home is a Jewish home. You can add interior mezuzot as you go. The front door is the threshold between the world and your sanctuary, and marking it with the words of the Shema is one of the oldest and most powerful acts in Jewish life.