🔐 UNDERSTANDING DOOR BACKSET MONTREAL– 2 3/8″ vs 2 3/4″ 🔐

🔐 DO YOU KNOW YOUR DOOR BACKSET? (IMPORTANT DETAIL MOST PEOPLE MISS)

Many clients don’t realize that when installing or replacing a lock, one small detail makes a big difference: the backset.

👉 What is a backset?
The backset is the distance from the edge of the door to the center of the hole where the lock or handle is installed.

📏 THE TWO STANDARD SIZES

✔ 2 3/8″ (60mm)
‱ Common on older residential doors
‱ Found in older homes, condos, and apartments
‱ Typical on locks installed between 1980–2000

✔ 2 3/4″ (70mm)
‱ Standard on most newer doors (2000–today)
‱ Common on commercial doors
‱ Used for offices, storefronts, and heavier doors
‱ Provides better spacing for larger and stronger hardware

⚠ WHY IT MATTERS

Installing the wrong backset can lead to:
‱ Misaligned locks (off-center installation)
‱ Weak security or improper function
‱ Extra labor and costly door modifications
‱ Need to push or alter the latch deeper into the door

👉 Many residential locks are adjustable (twist or pull latch),
but not all locks are adjustable—especially commercial-grade hardware.

🏠 RESIDENTIAL vs 🏬 COMMERCIAL

🏠 Residential Doors
‱ Older doors: usually 2 3/8″
‱ Newer doors: now standard at 2 3/4″

🏬 Commercial Doors
‱ Most require 2 3/4″
‱ Some older doors (pre-2000) may still use 2 3/8″
‱ If a 2 3/8″ latch is required, it often needs to be special ordered

đŸ› ïž PRO TIP FROM A LOCKSMITH

If you’re upgrading to high-security locks like
Medeco,
Mul-T-Lock, or
Abloy,

👉 The correct backset is critical for proper installation, performance, and long-term durability.

📞 NEED HELP? WE’VE GOT YOU COVERED

Whether it’s residential or commercial, we make sure everything is installed correctly the first time.

📧 info@serruriermontreal.com
📞 514-836-9097

⚠ Disclaimer:
This information is for general educational purposes only. Always verify door specifications and hardware compatibility before installation.