Walk into any hardware store and you will find dozens of ladder options. Choosing the wrong one does not just waste money — it can be dangerous. Here are the four criteria that matter most.
1. Ladder Type
- Step Ladders — Self-supporting, ideal for indoor tasks. No wall or structure needed.
- Extension Ladders — Lean against a structure. Best for roofing, siding, and exterior work.
- Specialty Ladders — Attic ladders, podium ladders, platform ladders for specific applications.
2. Height and Reach
For step ladders, subtract 2 feet from the ladder length for safe working height. For extension ladders, safe working length is approximately 75% of the full extended length when leaned at the proper 4:1 angle.
3. Duty Rating
- Type III (Light Duty) — 200 lbs. Household tasks only.
- Type II (Medium Duty) — 225 lbs. Light commercial use.
- Type I (Heavy Duty) — 250 lbs. Industrial and construction.
- Type IA (Extra Heavy Duty) — 300 lbs. Demanding industrial use.
- Type IAA (Special Duty) — 375 lbs. The highest rating available.
4. Material
Aluminum — Lightweight, strong, and corrosion-resistant. Not safe near electrical sources.
Fiberglass — Non-conductive. The choice for electricians and anyone working near live wires or electrical panels.