The answer to 'why is my architectural shingles ice dams' is that ice dams can form on architectural shingles due to improper insulation, ventilation, or roof design. Ice dams occur when heat escapes from the home, causing snow on the roof to melt and refreeze at the roof's edge, creating a dam that traps water and leads to leaks and damage.
Architectural shingles, which have a more complex 3D design compared to traditional asphalt shingles, can be more prone to ice dam formation if the roof system is not properly installed and maintained. Homeowners should check for adequate attic insulation, proper ventilation, and ensure the roof has the correct slope and drainage to prevent ice dams from forming.