Downspout Repair & Installation: Keep Water Flowing Right

When heavy rain falls, your roof becomes the first line of defense. But it’s the downspouts that quietly guide gallons of water safely away, protecting everything below. When they fail, it’s not just an inconvenience—it’s a risk to your walls, your foundation, and your peace of mind.

At STL Roofing, we see the aftermath every season: soaked basements, warped siding, and expensive repairs that could have been avoided. Downspouts might look simple, but they do a job that’s anything but. Let’s break down how to keep yours working right—before the next storm makes it urgent.

Why Downspouts Matter 🌧️

Picture your roof as an umbrella. The gutters are the rim, catching the water. The downspouts? They’re the handle, sending the flow exactly where it belongs—away from your home or business.

A working downspout means:

• No puddles near your foundation
• Less chance of basement leaks or mold
• Siding and landscaping stay intact
• Roofs last longer with less rot and fewer repairs

Neglecting them, though, is like leaving a window open in a storm. Water finds its way into the smallest cracks and weaknesses, causing damage you can’t always see at first.

Diagnosing Downspout Problems

Before you grab a ladder, know what to look for. Here’s a quick guide to spotting trouble with your downspouts:

Common Signs of Downspout Trouble:

• Water pouring over gutter edges instead of flowing out the bottom
• Stains or algae forming on siding near downspout exits
• Erosion or puddles under the downspout
• Sagging or detached pipes
• Rust, cracks, or visible holes
• Plants or debris sticking out from the top

Sometimes, the signs are subtle. You might notice a musty smell in the basement, or see paint bubbling on the outside wall. Water has a way of making itself known—eventually.

Troubleshooting Chart

| Problem | Likely Cause | First Steps | |------------------------|-------------------------|-------------------------------------| | Overflow at top | Clogged downspout | Clear debris at all openings | | Water at foundation | Disconnected joint | Re-attach or seal connection | | Leaks along length | Cracked, rusted pipe | Patch or replace section | | Pulling away from wall | Loose or missing straps | Re-secure with appropriate brackets |

DIY Fixes for Minor Issues

Some problems are simple to tackle if you’re comfortable with heights and have the right tools. Always follow ladder safety guidelines from OSHA and wear gloves—debris can be sharp or carry bacteria.

Steps for Basic Downspout Clearing:

1. Check the weather. Work on a dry day.
2. Set up your ladder on level ground. Have someone spot you.
3. Remove visible debris at the top and bottom of the downspout.
4. Flush with a garden hose. Start from the bottom if possible.
5. For stubborn clogs, use a plumber’s snake or flexible cleaning brush.
6. Inspect joints and straps. Tighten screws or replace as needed.
7. Seal minor leaks with exterior-grade silicone caulk.

If you see major rust, crushed sections, or if the downspout is pulling away from the building, it’s time to call for help.

Professional Installation and Repair

There’s a reason so many “DIY” repairs don’t last. Downspouts need the right pitch, secure attachments, and enough capacity for your roof size. STL Roofing’s emergency roofing teams handle it all—fast.

What We Do:

• Assess your gutter and drainage system as a whole
• Remove and dispose of broken or undersized downspouts
• Install replacements sized for your roof and rainfall
• Attach with secure brackets at code-approved intervals
• Add extensions or splash blocks to send water further from your foundation
• Check for proper drainage and offer upgrades, like leaf guards or underground drains

We use high-quality materials—aluminum, steel, or copper—matched to your roof and climate. Our work follows local building codes, including International Residential Code (IRC) standards for drainage.

When Should You Replace or Add Downspouts?

Sometimes a repair just isn’t enough. Here’s when to consider a full replacement or extra downspouts:

• Your gutters overflow during heavy rain, even when clean
• There’s erosion or standing water near your building
• Downspouts are crushed, rusted through, or missing sections
• You’ve added roof area (like an addition or garage)
• Existing downspouts are spaced more than 40 feet apart (per industry guidelines)

Adding downspouts can be a game-changer for older homes with undersized systems.

STL Roofing’s Workmanship Principles

We don’t rely on shortcuts. Every downspout installation is:

• Measured for flow and fit
• Attached to withstand wind and weather
• Sealed at all joints and elbows
• Tested for proper drainage before we leave

We stand behind our repairs and installations with clear communication and follow-up support. STL Roofing is available for emergencies 24/7—rain or shine.

Downspout Troubleshooting Quick-Reference

If you notice:

• Overflow or leaks after a storm
• Water pooling at the base of walls
• Detached or rattling pipes

Your next steps:

• Check for visible clogs or separations
• Try flushing with a hose (if safe)
• Call STL Roofing for prompt, professional repair

FAQ: Downspout Repair & Installation

How often should downspouts be cleaned?
Twice a year is ideal—once in spring and again in fall, as recommended by the International Association of Certified Home Inspectors.

Can I add extra downspouts myself?
It’s possible, but proper sizing and placement are key. Improper installation can shift water problems elsewhere. For best results, consult with a professional team like STL Roofing.

Should downspouts drain onto the driveway or lawn?
Downspouts should direct water at least 4–6 feet from the foundation, ideally onto splash blocks or into a drainage system. Avoid directing water onto paved areas where ice can form in winter.

Is downspout repair covered by insurance?
Sometimes, if damage is caused by a covered peril (like a storm). Check your policy or ask your provider.

Local & Seasonal Considerations

Rainfall patterns, freeze/thaw cycles, and even the number of trees around your property all affect downspout performance. After a major storm, inspect downspouts for new clogs or damage. In winter, make sure downspout exits remain clear to prevent ice dams—a common cause of roof repair near you.

Practical Tips for Lasting Performance

• Install leaf guards if trees overhang your roof
• Use splash blocks or flexible extensions to move water away
• Inspect during and after heavy rain to catch issues early
• Schedule annual inspections with STL Roofing for peace of mind

Don’t wait for water damage to make downspout repair an emergency. Whether you need a quick fix, a full replacement, or a new installation, STL Roofing is ready to help—day or night.

Call STL Roofing now — or reach us anytime at  888-887-3097 .