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Do Gutter Guards Cause Ice Dams?

Do Gutter Guards Cause Ice Dams?

As winter sets in, homeowners often worry about ice dams forming on their roofs and causing potential damage to their properties. Gutter guards are a popular solution for preventing debris buildup in gutters, but some people wonder whether they could contribute to ice dams. In this blog, we will dive into the relationship between gutter guards and ice dams to determine whether there is any truth to the myth that gutter guards cause ice dams.

Understanding Gutter Guards

Before addressing the concern, it’s essential to understand the purpose and function of gutter guards. Gutter guards are devices designed to keep leaves, twigs, and other debris out of gutters while allowing rainwater to flow through freely. Their primary objective is to prevent clogs in gutters, which can lead to water overflow, roof leaks, and potential water damage to a home’s foundation and interior.

The Formation of Ice Dams

Ice dams occur when snow accumulates on a roof and begins to melt due to heat escaping from the attic. As the melted snow water flows down the roof and reaches the colder eaves, it refreezes, forming a barrier of ice at the edge of the roof. Subsequent melting snow can then back up behind this ice dam, causing water to seep under the shingles and into the house.

Do Gutter Guards Cause Ice Dams?

The notion that gutter guards cause ice dams is not entirely accurate. Gutter guards themselves do not generate ice dams. Instead, ice dams are primarily caused by poor attic insulation and ventilation, which leads to uneven roof surface temperatures. When the roof’s upper part becomes warm enough to melt the snow while the eaves remain cold, the melted snow water refreezes and forms ice dams.

In some cases, improperly installed gutter guards may exacerbate existing ice dam issues. For instance, certain types of gutter guards, especially solid ones or those with very narrow openings, may allow snowmelt to freeze inside the gutters and create ice dams. However, this occurrence is not unique to gutter guards. Clogged gutters without guards can also contribute to ice dam formation. Learn more about the benefits of gutter covers.

Preventing Ice Dams

To prevent ice dams, homeowners should focus on improving attic insulation and ventilation. Ensuring that the attic remains consistently cold during winter will minimize the risk of uneven roof surface temperatures that lead to ice dams.

Tips to Prevent Ice Dams:

  1. Adequate Insulation: Insulate the attic floor to prevent heat from the living spaces below from rising and melting the snow on the roof.
  2. Proper Ventilation: Ensure the attic has adequate ventilation to maintain a cold roof surface and allow for natural airflow.
  3. Seal Air Leaks: Identify and seal any air leaks in the attic, including around light fixtures, vents, and chimneys.
  4. Gutter Maintenance: Keep gutters clean and free from debris, whether or not you have gutter guards installed.


In conclusion, gutter guards themselves do not cause ice dams. Ice dams are primarily a result of poor attic insulation and ventilation, leading to uneven roof surface temperatures that cause snowmelt to refreeze at the roof’s eaves. Gutter guards, when installed correctly and combined with regular gutter maintenance, can actually help prevent ice dams by reducing the chances of clogs and potential overflow. To safeguard your home from ice dams, prioritize proper attic insulation and ventilation, along with routine gutter maintenance, regardless of whether you have gutter guards installed.

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Mississauga Gutter provides high-quality, affordable gutter services for residential and commercial properties in Mississauga, ON.

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