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How to Clean Gutters and Downspouts — Bothell, Washington

Complete checklist with climate-adjusted recommendations for Bothell, Washington

Overview

Remove debris, flush with water, check for proper drainage away from foundation.

DIY FriendlyEasy~60 min

Step-by-Step Guide

Set up your ladder safely

Place an extension ladder on firm, level ground. The base should be 1 foot away from the wall for every 4 feet of height (the 4-to-1 rule). Use a ladder stabilizer or standoff to prevent damage to the gutter and provide a more stable platform.

Remove large debris by hand

Working in 3-foot sections, scoop out leaves, twigs, and compacted sediment with a gutter scoop or garden trowel. Drop debris into a bucket hung from the ladder or onto a tarp below. Work away from the downspout outlet so you push debris toward the open end.

Scrub stubborn buildup

For caked-on grime or the black streaks of asphalt runoff, use a stiff-bristle brush and a bucket of warm water with a squirt of dish soap. Scrub the inside of the gutter trough, paying attention to corners and seams where silt collects.

Flush gutters with a hose

Starting at the end opposite the downspout, run a garden hose at full pressure along the length of the gutter. This washes out fine sediment and confirms the gutter slopes correctly toward the downspout — water should flow steadily, not pool.

Clear downspouts

Insert the hose into the top of each downspout and run water at full pressure. If water backs up, you have a clog. Feed a plumber's snake or downspout auger into the top opening and work it through the clog. For stubborn blockages, disconnect the bottom elbow and work from both ends.

Check gutter slope and hangers

Gutters should slope approximately 1/4 inch per 10 feet toward the nearest downspout. If water pools, adjust the hangers. Tighten any loose gutter screws or spikes and replace hangers that are bent or pulling away from the fascia.

Verify drainage away from foundation

Run water through the full system and observe where it exits the downspout. Water should discharge at least 4–6 feet from the foundation. If it pools near the house, add downspout extensions or splash blocks. Consider underground drain lines for chronic drainage problems.

What You'll Need

Tools

- Extension ladder with stabilizer
- Gutter scoop or garden trowel
- Garden hose with spray nozzle
- Work gloves (heavy-duty)
- Safety glasses
- Bucket or tarp
- Plumber's snake or downspout auger (for clogs)

Materials

- Downspout extensions (if needed, $5–$15 each)
- Replacement gutter screws or hangers (if any are loose)
- Gutter sealant (for minor leaks at seams)

Cost Estimates

DIY Cost

$0–$30 (extensions and sealant if needed)

Professional Cost

$100–$250 for a single-story home; $150–$400 for two stories

Safety Tips

Never lean a ladder against the gutter itself — use a ladder stabilizer that rests against the fascia or roof edge.
Wear heavy work gloves — gutters often contain sharp metal edges, screws, and debris.
Do not overreach from the ladder. Move the ladder frequently instead.
Avoid cleaning gutters near power lines. Call your utility company if lines are within 10 feet of your work area.

When to Call a Professional

Call a professional if your home is more than two stories, the roof pitch is steep, gutters are sagging or pulling away from the fascia, or if you are not comfortable working from a ladder. Also call a pro if you discover rust holes or sections that need replacing.

Pro Tip

Clean gutters at least twice a year: once in late spring and once in late fall after most leaves have dropped. If you have overhanging trees, consider installing gutter guards — they won't eliminate cleaning entirely but can reduce it to once a year.

Common Mistakes to Avoid

Using a pressure washer inside the gutter — it can dent aluminum gutters and blast water behind the fascia board.
Ignoring downspout clogs — a clean gutter with a blocked downspout overflows just as badly.
Failing to check drainage at the ground level — water pooling against the foundation is the most expensive problem gutters are meant to prevent.
Cleaning gutters before all the leaves have fallen in autumn, requiring a second cleaning weeks later.