Ladder Inspection: What to Check Before Every Climb
Falls from ladders are one of the leading causes of fatal home injuries — and most are preventable with a 5-minute inspection before every climb. Worn rubber feet, cracked rails, bent rung locks, and loose spreaders are the most common failure points, and all are visible before you ever set foot on the first rung. Here's what to check every time.
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Common Symptoms
- Ladder wobbles or rocks during use
- Feet slip on hard floors
- Extension ladder rung locks don't click into place
- Step ladder spreader braces feel loose or flex
- Visible corrosion, cracks, or bent rails
Most Likely Causes
- 1
Worn or Missing Rubber Feet
Rubber end caps on ladder feet wear smooth over time, especially on hard floors. A worn foot provides almost no friction and can cause the base to kick out without warning.
- 2
Cracked or Bent Rails
Side rails take the full structural load of the climber and any carried materials. A crack, bend, or twist in a rail compromises the ladder's ability to support that load safely.
- 3
Loose or Broken Rung Locks
Extension ladders rely on spring-loaded rung locks (hooks) to secure the fly section at the correct height. If either lock fails to engage fully, the fly section can collapse under load.
- 4
Unlocked or Damaged Spreader Braces
Step ladders must have both spreader braces fully locked open to form a rigid A-frame. A spreader that is bent, cracked, or only partially open allows the ladder to fold under load.
- 5
Corrosion or Rot on Structural Members
Aluminum ladders used in damp or salty environments develop corrosion that pits and weakens the metal. Wood ladders exposed to weather develop rot, especially at the rail ends and step joints.
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Quick DIY Checks
Never use a ladder with a cracked rail, broken rung, or missing foot — retire it immediately. Mark it 'DO NOT USE' and dispose of it so no one else uses it.
Never paint a wood ladder — paint hides cracks and rot. If you need to protect a wood ladder from moisture, use a clear penetrating oil only.
ANSI Type ratings matter: Type III (200 lbs) is household-only. For any real work with tools or materials, use a Type I (250 lbs) or Type IA (300 lbs) rated ladder.
- 1Check the weight rating label — confirm it exceeds your weight plus the weight of your tools and materials. ANSI Type IA (300 lbs) or Type I (250 lbs) for any real work; Type III (200 lbs) is household-only.
- 2Inspect all rungs and steps for cracks, bends, or loose fasteners. Grab each rung and apply lateral and vertical force — any movement indicates a loose fastener or cracked weld.
- 3Check the feet and end caps — worn or missing rubber feet cause slips on hard floors. Grip the feet and try to rotate or pull them off; loose feet must be replaced before use.
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Try Pro — $7.99/mo- 4For extension ladders: test both rung locks (hooks) by pulling the fly section up and letting each lock engage. Both must click over a rung and hold firm — not just rest on top of it.
- 5For step ladders: open the ladder fully and lock both spreader braces until they click. Apply light sideways pressure to each brace — they should be rigid with no flex or wobble.
- 6Check for corrosion on aluminum ladders (white powder or pitting on rails and rungs) or rot on wood ladders (soft or discolored wood, especially at rail ends and step joints).
- 7Look for bent or twisted rails — sight down each rail from top to bottom. Any bow or twist means the ladder is structurally compromised and must be retired immediately, not repaired.
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Repair vs Replace
Rubber feet and rung locks are inexpensive and worth replacing. Any structural damage — cracked rails, bent rungs, broken welds, or twisted rails — means the ladder must be retired. A replacement ladder is far cheaper than a fall-related injury.
Est. Repair Cost
$5–$30 for feet or rung lock replacement
Est. Replacement Cost
$60–$300 for a new fiberglass or aluminum ladder
Recommended Tools & Parts
- Buy on Amazon →
Replacement Rubber Feet (Universal)
Universal rubber end caps that fit most aluminum and fiberglass ladders. Restore slip-resistance on hard floors and prevent rail end wear.
$5–$15
- Buy on Amazon →
Replacement Rung Locks for Extension Ladders
Spring-loaded rung lock hooks compatible with most aluminum extension ladders. Replace both locks at the same time — if one is worn, the other is close behind.
$8–$20
- Buy on Amazon →
Touch-Up Paint for Fiberglass Rails
UV-resistant paint for fiberglass ladder rails to prevent UV degradation and moisture intrusion. Do NOT use on wood ladders — use clear penetrating oil instead.
$10–$20
Links are Amazon affiliate links (tag: fixitfastai-20). Prices are estimates.
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Frequently Asked Questions
- How often should I inspect my ladder?
- Every single time before use — not just once a season. A ladder that was fine last week may have been dropped, stored improperly, or had its feet wear smooth since then. The 5-minute inspection is the habit that prevents falls.
- Can I repair a cracked ladder rail with epoxy or a sleeve?
- No. A cracked rail is a retired ladder. No epoxy, sleeve, clamp, or wrap restores the original structural integrity. The repair may hold for one climb and fail on the next. Retire the ladder and replace it.