How to Clear Clogged Exterior Downspouts

Downspouts are the unsung heroes of your home's exterior, silently funneling gallons of rainwater away from your foundation. When they clog, water backs up, spills over the gutters, and eventually finds its way into places it doesn't belong, like your siding or basement floor. A clean, free-flowing system is the easiest insurance policy you can buy for your home's structural integrity. Getting this done right isn't about fancy tools; it's about persistence and pressure. You are looking for a clear path from the gutter outlet all the way to the discharge point at the ground level. Done well, the water should exit the pipe with force, and your gutters should stay dry long after the rain stops.

1. Clear the Gutter Outlet First. Place your ladder securely on level ground. Remove all leaves, shingle grit, and twigs from the gutter outlet where it meets the downspout opening.
2. Blast Water Through the Pipe. Insert a high-pressure nozzle into the top of the downspout. Run the water on high to attempt to force out loose debris.
3. Break Up Stubborn Blockages. If the water backs up, feed a manual plumber's snake into the opening. Rotate the handle as you go to break up compacted leaves or mud nests.
4. Extract Debris from the Elbow. Check the bottom discharge end of the downspout. If the blockage is near the elbow or splash block, pull it out manually from the bottom.
5. Verify Clear Water Flow. Run the hose one last time at full blast from the top of the downspout. Ensure water exits freely at the base.
6. Tighten All Fasteners. Check the fasteners holding the downspout to the wall. Tighten any loose screws to ensure the pipe doesn't vibrate during heavy rain.