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Clogged Downspouts

Stop Water Damage Before It Starts. Clear Your Downspouts.

Nobody thinks about their downspouts. Until it rains, that is. Then suddenly that little pipe becomes the most important thing on your property.

Here’s the truth: a clogged downspout doesn’t just mean water overflowing. It means water pooling against your foundation. It means moisture seeping into your crawlspace. It means damage that costs thousands to fix.

That’s where Fox Window & Gutter Cleaning comes in. We’ve spent nearly two decades clearing downspouts across San Mateo County, CA. We know exactly what clogs them, why they matter, and how to get them flowing again.

Why Clogged Downspouts Are a Big Deal

Rain here isn’t like rain elsewhere. We get maybe 10-15 inches a year in Millbrae, but it all arrives between November and April. When it comes, it comes hard.

Check this out: if your downspout is blocked and you get a solid winter storm, that water needs somewhere to go. It doesn’t just disappear. It backs up your gutters, spills over the edges, and dumps water right next to your foundation. Older homes in the Taylor Estates or Lomita Park neighborhoods often sit on sloped lots, which makes the problem even worse. Water that should be channeled away ends up running toward your basement or crawlspace instead.

You don’t notice it when it’s dry. But when February rolls around and you hear water dripping somewhere it shouldn’t be, that’s your downspout telling you it needs help.

Book Clogged Downspout Service

Our downspout clearing service helps you:

  • Prevent foundation damage from water pooling
  • Stop overflow that stains siding and exterior walls
  • Avoid mosquito breeding grounds in standing water
  • Protect your landscaping from erosion
  • Keep your gutter system working the way it was designed to

Residential Downspout Clearing

We clear downspouts on all sorts of homes — those classic mid-century ranches in Millbrae, split-levels in Hillsborough, two-story places in Burlingame. And honestly, the type of home matters less than what’s clogging the pipe.

Around here, it’s usually a mix of things. Pine needles from those mature eucalyptus trees dropping onto your roof. Granules from aging asphalt shingles. Sometimes even a tennis ball or kids’ toy that somehow found its way in.

Our process is straightforward. We start at the top, remove the gutter screen or leaf guard, and work down. We use a high-pressure water jet to break up stubborn blockages, then flush the system clean. If we spot a dip in the pipe where water collects, we’ll let you know. We’ve seen it all — from crushed pipes to separated joints — and we’ll give you an honest assessment of what’s going on.

One more thing. We’re careful about wastewater. Some of the older sewer lines in the Green Hills area are sensitive, so we make sure runoff from our flushing goes where it should. It’s a small detail, but it matters.

We Handle:

  • Complete downspout unclogging and flushing
  • Gutter debris removal at the source
  • Downspout extensions and outlet repositioning
  • Standing water elimination after heavy rain
  • Second-story downspout service with safety equipment
  • Post-construction or move-in windows, often with stubborn debris from nearby eucalyptus trees

Commercial Window Cleaning for San Mateo County Businesses

A clean storefront, office, or building exterior reflects the professionalism of your business. Clients notice when glass is sparkling clean—and they notice when it’s not. We work around your business hours to minimize disruption, and we’re fully insured for your peace of mind. Whether you’re on Broadway in downtown Millbrae or managing an office complex near the 101, we show up when we say we will. For more on what we can do for you, check out Our Services.

Our commercial window cleaning services are ideal for:

  • Retail storefronts along El Camino Real
  • Office buildings and tech campuses
  • Restaurants and cafes
  • Medical clinics and professional offices
  • HOA and apartment complexes in Hillsborough and Burlingame

Our Window Cleaning Process

We follow a detailed, multi-step cleaning process designed for long-lasting, streak-free results. And honestly, it’s the little things that make the difference. Here’s how we tackle it:

1. Assessment

Every job starts with a quick walkthrough. We assess the number, size, and accessibility of your windows and note any problem areas like hard water spots or oxidation—which, by the way, is super common here. The mineral-rich tap water in Millbrae leaves that chalky white residue on glass, and we’ve seen it on homes in Taylor Estates and Lomita Park. We spot it early so it doesn’t become a bigger issue.

2. Prep & Protection

We protect your flooring, furniture, and landscaping as needed. Our team is respectful of your space and always takes care not to leave a mess behind. That’s a promise we make on every single job, from single-family homes in San Bruno to multi-story office buildings in South San Francisco.

3. Screen & Track Cleaning

We remove and clean screens with a soft brush and solution, then vacuum and wipe down the tracks and sills—details many companies skip. If you’ve got aluminum-frame windows from the 60s or 70s, we handle them carefully. Those frames corrode fast with the salty air from the Bay and SFO nearby, so we don’t use harsh tools that could scratch or strip the finish.

4. Glass Cleaning (Interior & Exterior)

We use eco-friendly, ammonia-free cleaning solutions and high-quality applicators to lift grime from the glass, followed by professional-grade squeegees to achieve a flawless finish. When wildfire smoke from the North Bay or Santa Cruz Mountains settles over the county, that fine ash clings to glass. Our solutions break that down without leaving streaks—something we’ve gotten pretty good at over the years. If you’re looking for a team that pays this much attention to detail, learn more About Us.

5. Final Inspection

Before we finish up, we'll walk the property with you and check each downspout together. We want you to see the water flowing freely — not just take our word for it. If anything's still not right, we fix it on the spot.

Types of Downspout Clogs We Handle

Clogged downspouts come in all shapes and sizes. Whether it’s a single downspout behind a gutter or a whole system that’s backed up, we’ll clear it out—quickly and safely. We’ve worked on everything from old galvanized downspouts on mid-century ranches to modern seamless gutters on newer builds, including:

We Clear Clogs In:

  • Standard metal downspouts
  • Vinyl and PVC downspouts
  • Square and rectangular downspouts
  • Corrugated and flexible downspouts
  • Downspouts with leaf guards or screens
  • Underground downspout drains
  • Decorative or historical downspouts on older homes

What’s Included in Every Downspout Unclogging Appointment?

We don’t just poke at the clog and call it done. When you book with Fox Window & Gutter Cleaning for clogged downspouts, here’s what you get:

  • Full inspection of your downspouts and gutter outlets
  • Removal of leaves, pine needles, and debris from the downspout opening
  • Flushing with water to locate and verify the clog
  • Clearing the blockage using specialized tools (no damage to your pipes)
  • Rinsing the downspout and testing water flow from the gutter to the ground
  • Advice on preventing future clogs, especially with those eucalyptus and pine trees near your roofline

How Often Should You Clear Your Downspouts?

Let’s be real—nobody wakes up on a Saturday morning thinking, “Gee, I can’t wait to check my downspouts.” But if you live in Millbrae or anywhere across San Mateo County, ignoring them is a gamble you don’t want to take. Between the morning fog that rolls in from the Pacific and the leaves from those big eucalyptus trees dropping in Lomita Park, your downspouts take a beating. We get it. That’s why we offer simple recurring service plans—so you don’t have to keep track of it yourself. We’ll set the schedule, send you a reminder, and honestly, you’ll barely have to think about it. When should you have your downspouts checked? It really depends on your property, what’s growing around it, and how the weather’s been treating you. Here’s our general rule of thumb: if you’re unsure where to start, learn more about How to Choose the Best Window Cleaning Service in Millbrae, CA or read our guide on How to Choose the Best Window Cleaning Service in San Mateo County. If you have questions, don’t hesitate to Contact Us.

  • Every 3–6 months for homes in coastal areas or spots with heavy tree cover—think the Taylor Estates or anywhere near the bay where that salty air speeds up wear and tear.
  • Quarterly for businesses, storefronts, or older commercial buildings downtown along Broadway where clogs can cause real headaches for upstairs tenants.
  • Twice per year for standard home maintenance, which works well for most ranch-style and split-level homes built in the 50s and 60s that dot Millbrae's hillsides.
  • Before special events, listing your home, or when the rainy season hits—because November through April brings all of San Mateo County's 10-15 inches of rain in a span of a few months, and that's exactly when a clogged downspout goes from annoying to disastrous.
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