Door Locks & Hardware: lifespan, maintenance and replacement

Typical lifespan: 10–20 years (about 15 years).

Maintenance schedule

• Lubricate lock cylinder with graphite — Annually
• Tighten screws on handles and strike plates — Every 6 months
• Test deadbolt engagement — Every 6 months
• Replace batteries (smart locks) — Every 6–12 months
• Re-key after moving into a new home — Once

Signs it needs replacing

• Key sticking or hard to turn
• Lock doesn't latch properly
• Visible rust or corrosion
• Smart lock connectivity issues
• Lock is a Grade 3 (residential minimum) — upgrade to Grade 1 or 2
• Lock mechanism feels loose

Tips

ANSI Grade 1 deadbolts offer the highest security. Smart locks add convenience but change batteries on time.