Have you noticed how incidents have increased since winter began on your job site? We’ve got you covered in this blog about Winter safety tips and hazards.
Snow, ice, and freezing temperatures turn routine tasks like walking across a scaffold or operating equipment into high-risk activities where a single misstep can lead to serious injury.
OSHA reports that slips, trips, and falls rank among the leading causes of workplace injuries every year, and winter conditions only increase the frequency of these incidents.
Meanwhile, OHS regulators warn that cold stress, snow accumulation, and freeze–thaw cycles can destabilize structures that appear safe during warmer seasons.
Learn best practices for winter safety on construction sites, drawing on OSHA, state, provincial, and federal regulations, as well as real winter construction incidents across North America.
In this blog, we'll show you:
Understanding the Most Common Winter Hazards
- Snow accumulation hides hazards: Thick snow can conceal roof edges, skylights, holes, materials, debris, and uneven surfaces. Many fatalities have occurred because workers stepped on snow-covered skylights or openings they could not see.
- Ice on walkways, ladders, equipment, and scaffolding: Ice significantly increases slip-and-fall incidents, especially black ice, during the early morning hours when temperatures drop.
- Freeze–thaw cycles destabilize soil and structures: Trenches, scaffolding bases, temporary enclosures, and access ramps can shift or collapse after thawing.
- Cold stress: Hypothermia, frostbite, and trench foot are serious risks for workers exposed to sub-zero temperatures or wind chills.
- Reduced visibility: Short winter days, blowing snow, fog, and poor lighting increase the likelihood of collisions and equipment-related incidents.
Here are Four Winter Safety Tips for Hazards in Construction
- Clear Snow Promptly and Continuously: OSHA and Canadian OHS regulators both emphasize frequent snow removal as the first line of defense against slip hazards
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- Clear walkways, access routes, stairways, platforms, and scaffolding at the start of every shift
- Remove snow after each new accumulation.
- Establish a snow-removal schedule with assigned responsibilities.
- Use snow blowers, plows, or shovels, depending on site size.
- Treat areas prone to drifting more frequently.
- Use Safe Methods for Removing Snow on Elevated Surfaces: Many fatalities occur when workers attempt to clear snow without understanding the hidden hazards beneath the snow.
OSHA recommends:
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- Using ground-based snow removal tools whenever possible
- Using aerial lifts instead of climbing directly onto snowy roofs
- Ensuring that all workers on elevated surfaces have fall protection.
- Avoiding areas where snow may conceal skylights or openings.
- Inspecting load-bearing capacity before allowing workers onto snow-covered roofs
- Manage Snow Loads on Temporary Structures: Temporary shelters, enclosed work areas, tool cribs, and tents often have lower snow load ratings than permanent structures. Heavy snowfall can cause partial or complete collapse, especially overnight. To prevent collapse:
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- Check snow-load ratings of all temporary enclosures.
- Remove snow before accumulation reaches hazardous levels.
- Reinforce structures as needed.
- Schedule inspections after major storms
Several Labor Department reports highlight injuries resulting from the collapse of temporary structures triggered by heavy snowfall.
- Mark Hazards Hidden Beneath Snow: Visible markers like flags, stakes, cones, or barriers should be used before snowfall and throughout the season. Specifically, on:
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- Roof edges
- Stair edges
- Drop-offs
- Holes or excavations
- Equipment or debris
- Changes in elevation
Here are Four Safety Tips for Managing Ice Hazards
- De-Ice All Walking and Working Surfaces
Clean areas that see the highest fall risk, such as stairs, ladders, scaffold access points, and ramps. Tools you can use include:
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- Ice melt
- Salt
- Sand
- Non-slip mats
- High-traction materials
- Treat Black Ice Zones Early
Black ice commonly forms:
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- Before sunrise
- In shaded areas
- On metal surfaces
- On lightly trafficked paths
Crews should treat these zones before shift start and continue monitoring throughout the day.
- Ensure Scaffolding, Ladders, and Elevated Work Areas Are Ice-Free
Scaffolding and ladders amplify fall risk when icy, so do this instead:
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- Inspect surfaces regularly.
- Use guardrails and fall arrest systems.
- Keep decking, rungs, and platforms dry and slip-free.
- Install non-slip treads on ladders and ramps.
4. Improve Traction for Heavy Equipment
Several real-world incidents involve skid steers or loaders sliding down icy ramps. To avoid these, your equipment should be:
- Fitted with winter tires or tire chains.
- Cleaned of snow/ice before operation.
- Moved at reduced speeds
- Operated with extra signaling in low visibility
Four Ways to Protect Workers from Cold Stress
Cold stress is just as dangerous as slip hazards.
- Use a Layering System for dressing for winter
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- Base layer: moisture-wicking
- Insulation layer: fleece or wool
- Outer layer: waterproof, windproof
- Schedule Warm-Up Breaks: These warm-up break areas must be:
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- Heated
- Dry
- Accessible
- Keep Workers Hydrated: Workers often forget to drink water in the cold, leading to dehydration.
- Train Workers to Recognize Symptoms of cold stress, which include:
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- Numbness
- Shivering
- Slurred speech
What are the Lighting and Visibility Essentials during Winter
Short days and frequent snowstorms reduce visibility, which in turn causes vehicular collisions, equipment strikes, and falls. So include the following for a safe winter job site:
- LED tower lights
- Motion-activated walkway lights
- Reflective high-visibility clothing
- Clear signage readable in snowy conditions
How to Operate Equipment Safely in Winter
Equipment accidents increase in winter due to poor traction and reduced visibility. Winterizing equipment includes:
- Switching to winter-grade diesel
- Adding engine block heaters
- Using cold-weather lubricants
- Inspecting batteries daily
- Removing snow/ice from operator steps and handholds
- Using long-handled scrapers instead of climbing equipment
How to Build a Winter Weather Safety Plan
Preparedness is one of the strongest predictors of winter jobsite safety. A winter weather plan should include:
- Daily weather monitoring
- Written snow/ice removal procedures
- Worker training on winter hazards
- Cold stress protocols
- Emergency response instructions
- Assignment of duties (who clears what, when, and how)
- Documentation for every incident or near-miss
Real-World Case Studies and Lessons Learned
Winter hazards cause injuries, structural failures, and operational shutdowns. Below are recent incidents from the last five years that show how snow, ice, and cold temperatures put construction workers and jobsite structures at risk.
- Roof Collapse from Snow Load — Ontario (December 2024)
Marie collapsed under conditions believed to involve snow and ice load stress. The collapse triggered a Ministry of Labour investigation and halted operations.
Lessons Learned:
- Snow load builds up faster than many crews anticipate. Even early-season storms can introduce significant weight on long-span roofs, temporary enclosures, trailers, and sheds.
- Daily structural monitoring is critical. Supervisors should inspect roofs, tarped areas, and temporary structures after every storm, not when time allows.
- Temporary structures are not designed for heavy accumulation. Enclosures, warm-up tents, tool cribs, and covered walkways must be cleared or reinforced before the load becomes dangerous.
- Workers performing snow removal face additional hazards. Hidden weak points, icy surfaces, and concealed openings increase the risk of falls.
Key takeaway:
Snow load can silently compromise even industrial-grade structures. Regular inspections and proactive snow removal prevent catastrophic failures.
Source: Northern Ontario Business – Labour ministry investigating roof collapse at Algoma Steel
- Worker Falls on Icy Roof Surface — OSHA (September 2024)
Even before winter officially began, a worker slipped on an icy roof surface during a shed repair and fell, sustaining injuries. OSHA found that the worker’s fall-protection system was not correctly adjusted.
Lessons Learned:
- Freezing temperatures can create winter-like hazards months before winter. Early autumn nights can produce ice on metal roofs and shaded areas.
- Fall protection must be adjusted for each worker and each task. Incorrect harness tension or incorrectly anchored lines provide a false sense of security.
- Short-duration jobs still require full safety measures. “It will only take five minutes” is one of the most dangerous assumptions on a jobsite.
- Supervisors must inspect elevated surfaces before assigning work. Ice can be thin, clear, and invisible on roofing material.
Key takeaway:
Ice hazards begin earlier than most crews expect. Reinforce fall-protection discipline and inspect surfaces before every elevated task — even short ones.
Source: OSHA Accidents
- Winter Injury Spike Across Construction Sites — British Columbia (January 2023)
In early 2023, WorkSafeBC reported a noticeable increase in workplace injuries caused by winter weather. These injury spikes aligned with cold temperatures, icy ground conditions, and reduced visibility.
Lessons Learned:
- Winter hazards compound — they do not appear in isolation. Icy walkways, wet surfaces, slush, and snowmelt-refreeze cycles create unpredictable ground conditions.
- Early mornings are high-risk windows. Black ice forms on ladders, scaffold stairs, access routes, and ramps before sunrise.
- Cold stress affects judgement and reaction time. Workers experiencing numbness, fatigue, or slowed reflexes are more vulnerable to slips and equipment incidents.
- Visibility is often overlooked. Snowstorms and shorter days reduce the ability of workers and equipment operators to see hazards or each other.
Key takeaway:
Winter is not just a slip hazard; it is a full-spectrum safety risk. Daily de-icing, lighting improvements, cold-stress monitoring, and revised morning routines dramatically reduce injuries.
Source: OHS Canada – Winter weather contributes to workplace injury spike: WorkSafeBC
Conclusion
Snow, ice, and freezing temperatures introduce hazards that can be mitigated with planning, vigilance, and the right tools. By using these safety tips and implementing a detailed winter weather plan, you can protect your teams, reduce downtime, and maintain productivity throughout the coldest months.
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Frequently Asked Questions about Managing Snow and Ice Hazards on Construction Sites
What are the OSHA safety tips for winter?
OSHA recommends clearing snow and ice, using proper fall protection, dressing in layers, taking warm-up breaks, and monitoring workers for cold stress. They also emphasize inspecting equipment, improving lighting, and adjusting schedules during severe weather.
Does OSHA have a cold-weather rule?
OSHA recommends clearing snow and ice, using proper fall protection, dressing in layers, taking warm-up breaks, and monitoring workers for cold stress. They also emphasize inspecting equipment, improving lighting, and adjusting schedules during severe weather.
What are the 4 Ps in freezing weather?
The 4 Ps are Prepare, Protect, Prevent, and Pay attention, guiding crews to plan, protect workers, prevent hazards, and stay alert to changing weather.
What is the main killer in winter emergencies?
Hypothermia is the leading cause of death in winter emergencies, often resulting from prolonged exposure to cold temperatures and wet conditions.
What are the winter safety tips for workers?
Dress in layers, wear slip-resistant boots, clear snow and ice often, take warm-up breaks, use fall protection, and watch for signs of cold stress.
What are the hazards of winter?
Winter hazards include snow and ice buildup, slips and falls, reduced visibility, cold stress, equipment malfunctions, hidden roof or ground hazards, and freeze-thaw instability.
What is the best advice for winter?
Slow down, plan, and never underestimate snow or ice; even a thin layer can lead to falls, cold stress, or equipment failure.
What temperature is too cold for construction workers?
Work becomes unsafe when wind chills fall below –20°C (–4°F), where frostbite can occur in minutes, requiring reduced exposure, warm shelters, or work stoppage, depending on conditions.
Can I refuse work if it is too cold?
Yes. In both the U.S. and Canada, workers can refuse unsafe work if conditions pose a risk, such as severe cold, frostbite risk, or lack of required PPE or warm-up shelters.
Sources:
Northern Ontario Business – Roof Collapse at Algoma Steel (Dec 2024) (https://www.northernontariobusiness.com/industry-news/manufacturing/breaking-construction-incident-reported-at-algoma-steel-9941764?utm_source=chatgpt.com), OHS Canada – Winter Weather Injury Spike (WorkSafeBC) (https://www.ohscanada.com/features/winter-weather-contributes-to-workplace-injury-spike-worksafebc/?utm_source=chatgpt.com), OSHA Accident Detail – Icy Roof Fall (Sept 24, 2024) (https://edit.osha.gov/ords/imis/accidentsearch.accident_detail?id=170698.015&utm_source=chatgpt.com), OSHA – Winter Weather Safety Portal (https://www.osha.gov/winter-weather), OSHA – Cold Stress Emergency Preparedness Guide (https://www.osha.gov/emergency-preparedness/guides/cold-stress), OSHA – Preventing Falls During Snow Removal (OSHA 3966 PDF) (https://www.osha.gov/sites/default/files/publications/OSHA3966.pdf), OSHA – Roof Snow Hazard Safety Bulletin (OSHA 3513 PDF) (https://www.osha.gov/sites/default/files/publications/OSHA-3513roof-snow-hazard.pdf), OSHA – Slips, Trips, and Falls Prevention Guide (https://www.osha.gov/sites/default/files/2018-12/fy16_sh-29672-sh6_SlipsTripsFallsHandout.pdf), IHSA – Winter Hazards Guide (https://ohsguide.ihsa.ca/en/topic/winter-hazards), Government of Ontario – Snow Loading & Roof Failure Alert (https://www.ontario.ca/page/alert-snow-loading-and-roof-failures), Construction Safety Association of Ontario – Winter Slips & Trips Guide (PDF) (https://www.constructionsafety.ca/wp-content/uploads/2021/03/Winter-Slips-and-Trips.pdf), US Claims – Construction Worker Winter Safety Risks (https://usclaims.com/educational-resources/construction-worker-safety-risks-during-winter-months/), ICW Group – Safe Removal of Snow & Ice From Rooftops (https://www.icwgroup.com/articles-insights/safety/how-to-safely-remove-snow-and-ice-from-rooftops/), Environment Canada – Wind Chill & Weather Warnings (https://weather.gc.ca/windchill/index_e.html), National Research Council Canada – Snow Load & Roof Failure Research (https://nrc-publications.canada.ca/eng/view/ft/?id=f930064c-8dc1-49aa-b3b3-f43c12d83338), WorkSafeBC – Winter Hazard Awareness (General Resource) (https://www.worksafebc.com/).