roof dust buildup 3

https://extra-wiki.win/index.php/How_Maricopa_County_Air_Quality_Affects_Your_Phoenix_Home_After_a_Haboob

You don't notice it at first, but over months and years, roof dust buildup can silently clog your gutters, trap moisture against shingles, and even weigh down your attic insulation. It’s that fine mix of debris, pollen, and grime that settles in every corner and valley. A thorough clean every spring keeps your roof breathing and your home dry.