How to Repair Gutters and Downspouts

Gutters are the unsung heroes of your home's exterior, acting as the first line of defense against water damage, wood rot, and basement flooding. When they sag, leak, or clog, they stop funneling rainwater toward the downspouts and start dumping it exactly where you don't want it: directly against your siding and foundation. A well-maintained gutter system should move water silently and efficiently, leaving no trace behind after a storm. Repairing them isn't glamorous work, but it is one of the highest-impact chores a homeowner can perform. You don't need expensive equipment, just a steady ladder and a keen eye for where the water goes when it leaves the roof. By tightening connections and sealing seams before the rainy season hits, you effectively extend the life of your entire roof and protect the structural integrity of your home for pennies on the dollar.

  1. Remove All Debris First. Remove all leaves, silt, and twigs by hand or with a plastic gutter scoop. Start at the downspout and work your way outward, dumping debris into a bucket rather than onto your garden beds.
  2. Test Water Flow Path. Use a garden hose to run water through the gutters toward the downspout. Observe the flow to see if there are any low spots where water pools or leaks that were previously hidden by debris.
  3. Seal Leaks With Polyurethane. Dry the leaky joints thoroughly with a rag. Apply a generous bead of gutter-specific polyurethane sealant inside the seam and smooth it out with a putty knife.
  4. Restore Proper Gutter Pitch. If a gutter section is sagging, remove the old spikes or screws. Reinstall the hangers using longer gutter screws to bite into the fascia board, ensuring you maintain a slight downward pitch toward the downspout.
  5. Tighten Downspout Connections. Check the straps connecting the downspout to the wall. If they are loose or missing, install new brackets or drill a small pilot hole to drive a screw through the strap into the siding.
  6. Verify Complete Drainage. Run the hose one final time to verify that every drop of water is captured and diverted through the downspout. Check that no drips persist at the repaired seams.