When the Rain Shows Up
Wet-Season Roofing Risks You Can’t Ignore
by Stephen Zasadil, WSRCA Safety Consultant, President, SNK Services LLC
(Editor’s Note: Stephen Zasadil spent ten years as a safety of flight operator with the United States Navy before beginning his career as a safety compliance consultant in 2009. He currently works with companies across the United States to provide OSHA compliance information, documentation, and training.)
For many contractors across the Western states, the wet months don’t just bring rain. They bring reality. This is the time of year when leaks reveal themselves. Minor flashing imperfections become major callbacks. Drainage issues that went unnoticed in the dry season suddenly turn into active ponding and interior water damage. While customers are focused on stopping water intrusion, crews must stay focused on something just as critical: staying safe while responding.
Even in traditionally dry regions, seasonal rain events are when roofing hazards quietly increase. Slips, electrical exposure, unstable decking, and emergency response work combine to create a higher-risk environment than many crews anticipate.
Wet Roofs Change Everything
A roof that felt stable and predictable in dry weather can behave very differently once wet. Dust turns slick, granules shift, and metal panels lose traction. TPO and PVC membranes become extremely slippery under even light moisture.
Footing becomes your first line of defense. Slips and falls are not always dramatic events. Many occur during routine movement such as carrying tools, stepping around penetrations, transitioning at parapets, or walking toward a ladder. Wet conditions shorten reaction time and reduce friction underfoot. Make sure to slow down, shorten your stride, and increase awareness at edges and transitions. What feels like just a little moisture can change traction instantly.
Leaks Mean Openings
When crews are dispatched to investigate leaks, they often encounter wet insulation, deteriorated decking, and concealed structural damage. Saturated materials add weight. Compromised decking may not visibly sag but can be weakened beneath the surface.
Probe before committing full body weight. Avoid concentrated loads over suspect areas. Communicate soft spots immediately. Wet months are when hidden weaknesses become exposed.
Water & Electricity Do Not Mix
This is the most underestimated hazard of the season. Rooftop HVAC units, exhaust fans, solar systems, and temporary power sources all introduce electrical exposure. When water is present, the risk escalates dramatically. Standing water can energize metal components. Extension cords routed across wet surfaces become shock pathways. Temporary lighting or pumps may introduce ungrounded hazards.
Crews must: inspect cords and GFCI protection before use, keep electrical connections elevated and dry, de-energize equipment before working near saturated areas, and never assume rooftop equipment is safe simply because it usually is. Water lowers resistance. That changes the equation.
Emergency Mentality Increases Risk
Wet-season calls often carry urgency. Customers want immediate solutions, interior damage creates pressure, and production schedules tighten. Rushing is where mistakes happen. Emergency repairs still require fall protection, hazard assessment, and communication. No leak response justifies bypassing safety systems. The job may be urgent, but the work must remain controlled.
Watch the Weather Above & Below
Wet conditions don’t only affect the roof surface. They affect ladder access, staging areas, and ground-level stability. Muddy access routes increase trip hazards. Wind combined with rain reduces visibility and balance.
Always remember: rain at the ground level does not always reflect wind conditions at elevation. Gusts at the roof edge can be significantly stronger. Reassess conditions continuously.
This Is the Season to Lead
Supervisors should use wet months as a reminder to reset safety expectations. Toolbox talks on slip prevention, electrical safety, and fall protection matter more now than during predictable dry cycles. Even in dryer climates, this time of year is when roofs are tested. When roofs are tested, crews are exposed.
Leaks will be found. Ponding will appear. Flooding will create urgency. Take care of yourself by slowing down, watching your footing, controlling electrical exposure, inspecting your surroundings before stepping, and communicating early. The rain is temporary, and injury is avoidable.
