North American Deadbolts

A smart lock can fit the door and still fail to operate its bolt smoothly. Start by identifying the existing lock, then compare the door with the exact model’s installation instructions. U.S. and Canadian deadbolts share familiar measurements, but product variants, included parts, and documented limits are not interchangeable by assumption.

Find the right check

• Choose a retrofit, replacement, or conversion path before comparing products.
• Identify single-cylinder, double-cylinder, or interconnected hardware and which action a replacement must perform.
• Measure deadbolt door preparation, including thickness, backset, bores, strike, and clearance, against the exact model’s instructions.
• For thick, narrow, or weather-exposed doors, verify any named kit, body clearance, and operating limits for the exact model and assembly.
• Plan physical-key access and rekeying before removing the current hardware.
• Compare USA and Canada documentation when the product, seller, or installation is cross-border.
• Check a manufacturer’s deadbolt compatibility list without treating a list entry as proof that the whole door will work.

Keep fit and operation separate

Dimensions are only one part of compatibility. The deadbolt must move freely, the strike must line up, and the smart lock must support the existing lock type and key arrangement. Check electronic features and hubs separately from mechanical fit.

Use the exact model and market instructions. A kit or a matching backset can resolve one condition without proving that the complete door will work. If an opening is shared, fire-rated, unusually constructed, or subject to building or accessibility requirements, get the applicable local guidance before changing the hardware.