Milwaukee receives an average of 46.5 inches of snow a year, while Syracuse, New York gets hit with nearly 120 inches annually—10 feet! And Chicago has been known to call in a few snow days.
As winter sets in and the snowflakes fly, commercial, institutional, and industrial rooftops become dicey environments where ice, snow, and reduced visibility obscure critical dangers. Among the most serious—and frequently underestimated—is the risk posed by a snow-covered skylight.
When blanketed by snow, a skylight can visually disappear into the roof surface, creating a hidden skylight hazard that places maintenance personnel, snow removal crews, and inspectors at significant risk. Addressing this threat through engineered skylight fall protection is a necessary component of effective winter rooftop safety.
Hidden peril—why skylights are such a winter fall hazard.
Skylights are designed to brighten building interiors with natural light, not to bear a worker’s weight. Even a thin layer of snow can give the illusion of a solid walking surface, disguising fragile glazing beneath. Winter conditions further heighten the danger:
- Wet, slippery surfaces, especially ice, increase the likelihood of a fall.
- Snow blurs visual cues and obscures designated safe pathways.
- Cold temperatures can weaken skylight materials through thermal stress.
In these situations, relying on worker awareness or administrative controls is insufficient. Permanent skylight fall prevention systems offer continuous protection regardless of weather or visibility. Regulatory requirements reinforce this necessity.
OSHA regulations for skylights—or any roof opening.
The Occupational Safety & Health Administration (OSHA) defines skylights as roof openings (literally holes in the roof) and requires that they be guarded whenever employees have rooftop access.
OSHA skylight requirements state that each skylight hole must be protected by a skylight screen or a fixed guardrail on all exposed sides, with construction standards establishing performance criteria for these systems.
Skylight safety systems for all seasons.
Skylight fall protection compliance is not seasonal. Winter simply makes noncompliance more dangerous.
A) Skylight Safety Screens
For flat or low-slope skylights, a corrosion-resistant galvanized or stainless steel mesh that covers the skylight is often the most direct and effective solution. They clamp to the sides of the skylight and are engineered to support the weight of a worker carrying tools. Even if the glazing cracks or fails, the screen prevents a fall-through incident.
Critically for winter skylight protection, the screen remains fully functional beneath snow and ice, neutralizing the risk even when the skylight itself is invisible. They comply with OSHA regulations for skylight covers in that they support at least twice the maximum intended load, are secured against accidental displacement, and prevent failure if stepped on or fallen against.
B) Skylight Guardrail Systems
In situations where perimeter protection is preferable—such as larger skylights, domes, or grouped roof openings—non-penetrating skylight guardrail systems provide robust, compliant fall protection. These fixed or freestanding railings surround the skylight curb, establishing both a physical barrier and a visual warning.
During winter, when skylight outlines may disappear under snow, guardrails clearly define restricted zones and help prevent inadvertent access to fragile areas. They meet OSHA’s guardrail criteria with top rails of 42 inches high (+/- 3 inches) that withstand a force of 200 lbs. applied in any outward or downward direction, have mid-rails installed halfway between the top rail and walking/working surface, and intermediate vertical members no more than 19 inches apart.
C) Skylight Hatch Guardrail
Skylight hazards also extend to roof access points. Operable skylight hatches can present open holes when in use and fragile surfaces when closed. A roof hatch guardrail kit addresses both conditions by framing the hatch with a compliant guardrail and a self-closing safety gate that closes automatically once the worker passes through. This ensures safe access to and from the roof while maintaining continuous fall protection during winter operations.
See us for your safety solutions.
Winter rooftop safety requires understanding hazards that are easy to miss but severe in consequence. Snow-obscured skylights represent one of winter’s most deceptive threats. By installing permanent, code-compliant skylight safety screens, guardrail systems, or hatch railings, facility managers create a rooftop environment that protects workers, meets OSHA requirements, and remains effective no matter how harsh the winter conditions become.
If you are responsible for fall protection at your facility, contact Lighthouse Safety for compliant safety solutions. We will discuss your concerns about regulations and what it will take for you to comply. Our services encompass everything you need, from design, engineering, and fabrication to installation, training, inspections, and other support.
