Deadbolt Installation Experts

What Is the Difference Between a Single-Cylinder and Double-Cylinder Deadbolt?

A single-cylinder deadbolt uses a key outside and a thumb turn inside, while a double-cylinder deadbolt requires a key on both sides. Double-cylinder locks are commonly used near glass panels where someone could otherwise reach inside and unlock the door.

Can You Install a Deadbolt on an Existing Door Without Replacing It?

Yes, a deadbolt can usually be installed on an existing wood, steel, or fiberglass door without replacing the entire door. The door still needs enough thickness and proper backset spacing so the lock body and strike plate fit correctly.

Why Does My Deadbolt Stick or Become Hard to Turn?

Deadbolts usually stick because the door has shifted, the strike plate is misaligned, or seasonal expansion has changed the frame spacing. Even a small alignment change can cause the bolt to drag instead of sliding smoothly into the latch opening.

Deadbolt Vs. Smart Lock: Which Is Better for Exterior Security?

Traditional deadbolts provide simple mechanical security, while smart locks add app control, codes, and remote access features. Many smart lock systems still rely on a physical deadbolt mechanism underneath for actual locking strength.

How Long Does a Properly Installed Deadbolt Typically Last?

A quality deadbolt can last 10 to 20 years when the internal cylinder, bolt, and strike hardware stay protected from moisture and wear. Higher-grade locks with hardened steel components usually hold up longer under daily use.