
You might feel great after clearing leaves from your gutters — but appearances can be deceiving. Many Bellevue homeowners do a surface-level cleaning and unknowingly leave behind deeper issues [[s1]] that later result in leaks, mold, or costly water damage. So what are the common things DIY cleaners overlook?
Here’s what professional gutter techs [[p1-home]] routinely check — and what most DIY attempts miss.
Blocked Downspouts
Leaves aren’t the only problem. Silt, roof granules, and bird nests often clog downspouts deep inside. A quick rinse won’t clear it. If water backs up during Bellevue’s next downpour [[b2]], you’ll be left with overflowing gutters.
Improper Slope (Pitch)
Gutters need a slight, consistent slope [[b1]] to drain properly. Even a minor sag or improper pitch sends water in the wrong direction — often unnoticed during DIY cleaning [[b4]]. Professionals measure and adjust this with a trained eye.
Loose Brackets and Fasteners
Over time, the weight of water and debris weakens the fasteners. DIY cleaners often ignore this until gutters start to pull away from the fascia board, causing serious water infiltration behind siding.
Hairline Cracks or Seam Leaks
Small cracks in gutter seams or corners might not be visible during cleaning. Without a careful inspection, they continue to leak over time and damage your foundation or landscaping.
Gutter Guard Issues
Gutter guards can help — unless they’re clogged or misaligned. DIYers may not remove and clean under them, missing built-up moss and wet sludge underneath.
Soffit and Fascia Rot
While clearing leaves, most people don’t inspect the wood behind or under the gutters. Soft spots in the fascia or soffit often indicate long-standing leaks that need urgent attention.
Roof Shingle Debris
Heavy rains [[b2]] wash shingle granules into your gutters, which settle like sediment. DIY cleaners often skip this hidden layer, thinking it’s just dirt. Over time, it clogs and adds weight.
Insect or Rodent Nests
Wasps, ants, or mice love damp debris-filled gutters. Reaching in blindly can result in stings — and many people don’t notice early nests or damage until it’s too late.

Final Thoughts
Cleaning your gutters yourself might check the visual box, but missing these hidden problems can lead to long-term damage — especially in Bellevue’s rainy, tree-dense environment.
Don’t risk overlooking what matters most [[s6]]. A professional service spots what you can’t see and prevents what you can’t afford.
Want a gutter health check and cleaning done right? Call us today for Bellevue’s most trusted gutter service [[p2]].