Gutter guards alone do not prevent ice dams. However, heated gutter guards or installing guards alongside proper insulation and ventilation can help reduce the formation of ice dams by allowing snowmelt to drain properly through the gutters.

Ice dams form when snow melts and refreezes along the roof edge. Gutter guards, particularly heated ones, can help manage the water flow and prevent ice buildup. Ensuring proper roof insulation and ventilation is also important in reducing ice dam risks.