Gutters have one job: move rainwater off the roof and away from the foundation. It’s an easy system to forget about because it only fails visibly once it’s already clogged — but a gutter packed with leaves, twigs and dirt stops directing water where it should go, and that has consequences that build over time rather than all at once.
What a clogged gutter actually causes
When water can’t move through a blocked gutter, it pools instead — either overflowing at the roofline or backing up under roofing material. That pooling is what leads to landscape erosion around the drip line and, over years of repeated overflow in the same spot, can contribute to foundation issues. Standing water in a clogged gutter is also a breeding spot for mosquitoes, and organic debris left to decompose there can draw rodents looking for shelter.
Overflow also shows up as streaking on siding — a cosmetic problem, but one that gets harder to clean off the longer it’s left, since the stain sets into the surface over repeated wet-dry cycles.
How often gutters actually need cleaning
Most homes in Metro Vancouver’s climate do well with two cleanings a year: once in spring after trees have finished dropping seed pods and catkins, and again in fall after leaf drop. Properties with heavy tree cover, or in areas that see more rain, often need a mid-season check as well — the frequency depends more on what’s dropping into the gutter than on a fixed calendar.
Regular cleaning is also the cheaper option compared to the alternative: a gutter that’s been ignored for a few seasons usually needs more time on-site to clear, and any water damage that’s already started costs more to fix than the cleaning would have.
If it’s been more than six months since yours were checked, a gutter cleaning now is worth it ahead of the next wet stretch.