Clogged gutters in Portland can lead to various issues such as gutter overflow, fascia rot, roof edge leaks, ice dam formation, shingle deterioration, attic moisture, pest infestation in gutters, and drainage issues. When gutters get clogged, water can overflow and seep into the fascia boards, causing them to rot. This can lead to leaks at the roof edge and the formation of ice dams in winter. The accumulated debris in clogged gutters can also retain moisture, leading to deterioration of the roof shingles. Additionally, the excess moisture can cause problems in the attic and attract pests. Regular gutter cleaning in Portland is essential to prevent water damage to siding and address drainage issues before they escalate.