Ice Dams: Diagnosing the Problem and Preventing Damage
Ice dams are a common winter problem that can cause significant damage to your roof and
home. The University of Minnesota’s research points to several main causes of ice dams,
including poor air sealing, inadequate insulation, and insufficient attic ventilation. Here’s what
you need to know about diagnosing and preventing ice dams.
What Causes Ice Dams?
Ice dams form when warm air escapes from your living space into the attic, heating the roof and
causing snow to melt. The water then flows down to colder areas, like the eaves, where it
refreezes into ice. Over time, this buildup can create a barrier that traps more water, leading to
leaks and damage. The main culprits include gaps in air sealing, low insulation levels, and poor
ventilation.
Using Diagnostic Tools: Blower Door Tests and Infrared Cameras
Blower door tests are a key tool in identifying air leaks that contribute to ice dams. By creating a
controlled pressure difference, we can find areas where air is escaping from your home into the
attic. Infrared cameras complement this by showing heat loss patterns, helping us pinpoint
where insulation may be missing or ineffective.
Zone Pressure Diagnostics: A Closer Look at Air Movement
Zone pressure diagnostics give us insights into how air moves through your home. By
measuring pressure differences, we can detect hidden pathways that allow warm air to enter the
attic, fueling the formation of ice dams.
The Importance of Proper Ventilation and Air Sealing
Fixing air leaks and ensuring proper attic ventilation are critical steps in ice dam prevention.
Sealing gaps around vents, ducts, and attic hatches prevents warm air from reaching the roof
deck, while good ventilation helps cool the roof and vent moisture out.
Protect Your Home with Affordable Insulation’s Expertise
Dealing with ice dams or concerned about your home’s energy efficiency? Affordable Insulation
offers thorough diagnostics and expert solutions to help you address these issues. Contact us
today for a free consultation and learn how we can help protect your home this winter.