Window Cleaners

Window cleaners work on ladders, roofs, rope descent systems (“bosun’s chairs”) and suspended platforms high on buildings. Falls are the main hazard, and they almost always involve a failed anchor, a missing backup line, or a ladder in the wrong place.

• Building services
• General Industry

Top hazards

• Falls from rope descent systems and suspended platforms
• Falls from ladders, especially on uneven ground or near power lines
• Falls from roofs while rigging
• Anchor or rope failure
• Wind and storms
• Dropped tools and equipment striking people below

Rope descent systems

• Certified anchorages: before an RDS is used, the building owner must tell the employer in writing that each anchorage has been identified, tested, certified and maintained. Ask to see it.
• Two lines: a main line for the descent system and a separate, independently anchored fall arrest line for your harness.
• Height limit: OSHA limits RDS use to 300 feet above grade unless the employer can show that’s infeasible or more hazardous.
• Rope protection at parapets and edges so lines can’t be cut.
• Inspect ropes, descent devices, harness and connectors before each use.
• Training: only trained workers rig and use the system.

Ladders and roofs

• Set ladders on firm, level ground, at the right angle, and tie them off. See Extension Ladders.
• Use fiberglass ladders and stay at least 10 feet from overhead power lines. See Overhead Power Lines.
• Use water-fed poles from the ground when possible to avoid working at height.
• Use fall protection when rigging near roof edges. See Roof Work.

Before you go over the edge

• Anchorage certification in hand
• Main line and independent fall arrest line rigged to separate anchors
• Edge protection on ropes
• Equipment inspected
• Weather and wind checked
• Area below barricaded
• Rescue plan ready

Last updated: October 2, 2026