Ice dams are a common winter issue for commercial properties in cold-weather climates. They form when melting snow refreezes at roof edges, trapping water on the roof. When left unaddressed, ice dams can cause roof leaks, interior water damage, safety hazards, and costly repairs. Because commercial roofs are larger and more complex than residential roofs, ice dam issues can escalate quickly and disrupt tenants, employees, and building operations.
Knowing what causes ice dams and how to prevent them is an important part of winter property maintenance.
What Causes Ice Dams?
Ice dams can form even with minimal snowfall. While heavy snowfall can accelerate the process, the real issue is freezing temperatures combined with repeated thawing and refreezing.
Here’s how it happens:
- Snow accumulates on the roof
- Heat from inside the building warms the upper roof surface
- Snow melts and flows toward roof edges
- Water refreezes at colder edges or drainage areas
- Ice continues to build as the cycle repeats
Poor insulation, inconsistent roof temperatures, inadequate ventilation, and blocked gutters or drains all increase risk. Flat and low-slope commercial roofs are especially vulnerable because water drains more slowly and may pool before refreezing.
Why Ice Dams Are a Risk for Commercial Buildings
Ice dams are more than just a winter nuisance. For property owners and managers, they create operational and liability concerns, such as:
- Roof leaks and interior water damage
- Mold and moisture issues
- Slip-and-fall hazards from falling ice or overflow
- Tenant disruption and business interruptions
- Emergency repair costs during peak winter conditions
Because ice dams often form gradually and may not be visible from the ground, damage is sometimes discovered only after water enters the building.
How to Prevent Ice Dams on Your Property
While ice dams cannot always be prevented entirely, proactive maintenance can help reduce risk.
Recommended prevention steps include:
- Maintaining proper insulation and ventilation
- Keeping gutters, downspouts, and roof drains clear
- Removing excess snow after heavy snowfall
- Sealing air leaks in the roof system
- Installing water and ice shield protection when needed
Routine roof and gutter inspections in the fall and spring help identify issues before winter weather arrives.
What to Do If Your Property Has an Ice Dam
If an ice dam is visible or reported, prompt action helps limit damage.
You can:
- Safely remove excess snow where possible
- Check that gutters and drains are as clear
- Avoid chipping or breaking ice with tools that could damage the roof
Ice dam removal on commercial buildings can be dangerous without proper equipment. If ice dams persist or signs of water intrusion appear, professional service is strongly recommended.
Professional Ice Dam Services for Commercial Properties
Managing ice dams is part of protecting your building, tenants, and long-term investment. Professional inspection, maintenance, and removal services help reduce risk and prevent small issues from becoming costly repairs.
Contact Ned’s Commercial Services at 888-616-3307 to help protect your property this winter.
