A gutter leak almost always shows up the same way. You look out the window in a rainstorm and there is a steady drip coming off the gutter where there should not be one.
Where that drip is coming from tells you almost everything about the fix. Gutters leak in four or five predictable places, and each one has a different repair.
Some of them are a twenty minute job with a tube of sealant. Others are a sign the gutter is done, and no amount of sealant will change that. This is how we sort them on a professional gutter repair visit, so you can do the same from the ground.
Step one: find where it is actually leaking
Do this on a dry day. Run a garden hose into the gutter at the far end from the downspout and watch.
Water dripping from underneath the gutter is a true leak. Water spilling over the front or back edge is overflow, which is a clog or a pitch problem, not a hole.
Look for the tells. Dark streaks or tiger striping on the outside of the gutter, white mineral crust at a joint, peeling paint on the fascia behind it, or a clean spot in the dirt below where drips have been landing.
Seam leaks
If your gutters were installed in ten foot sections, every joint is a seam held together with a connector and sealant. Sealant is a consumable. It hardens, shrinks, and pulls away after several winters, and the seam starts to weep.
The fix is to clean the joint down to bare metal, dry it completely, scrape out the old sealant, and apply a fresh bead of gutter-grade sealant on the inside of the seam. Done right, that buys a few more years.
Seamless gutters do not have these joints. The only seams are at the corners and the end caps, which is the main reason they leak so much less.
End cap leaks
End caps are crimped onto the gutter and sealed. They are also where water sits deepest when the pitch is slightly off, so they fail more often than people expect.
Reseal the same way as a seam, from the inside. If the cap is loose or the crimp has opened up, replace the cap rather than gluing a bad one back on.
Downspout joints and outlets
The outlet is the hole where the gutter meets the downspout, and it is the busiest part of the whole system. Leaks here usually come from one of three things.
The outlet drop was never sealed properly. The elbows below it have pulled apart at the joints. Or the downspout is clogged, water is backing up into the gutter, and it is finding every weak spot around the outlet at once.
Clear the downspout first. Then reseal the outlet flange from inside the gutter and re-secure loose elbows with screws, not just friction.
Hangers, sag, and pitch
Some “leaks” are gutters that no longer slope toward the downspout. A hanger pulls loose, a section sags, water pools in the low spot, and it spills over the back edge onto the fascia.
Fix the pitch. Reset or add hangers so the gutter drops about a quarter inch for every ten feet toward the downspout, with a hanger at least every two feet. If the hanger screws will not bite because the fascia is soft, stop, because that is a rot problem and it comes before any gutter work.
Holes and corrosion
Aluminum gutters pit and pinhole where two metals meet or where wet debris sat for years. Steel gutters rust from the inside out.
A small hole can be patched with a piece of aluminum flashing set in sealant on the inside of the gutter. It is a stopgap. Once a gutter has one hole, more are coming.
What is reasonable to do yourself
Resealing a seam or an end cap on a single story home with a stable ladder is a fair homeowner job. Anything on a second story, anything near a power line, and anything that involves re-hanging gutters is worth a call.
The other honest caveat is that sealant is temporary. If you are resealing the same joint for the second or third time, you are maintaining a gutter that has already failed.
When a leak means replace, not repair
We tell homeowners to stop repairing when two or more of these are true.
The gutters are sectional and leaking at multiple seams. There is rust or corrosion you can see through. The gutters are pulling away from the house or the fascia behind them is soft. Or the system is more than twenty years old and you have already paid for a repair in the last two.
At that point a seamless gutter replacement is usually the cheaper path over the next ten years. New seamless aluminum gutters with downspouts typically run $10 to $20 per linear foot installed, and they remove the seams that caused the problem in the first place.
Get a straight answer before you buy sealant
Most leaks are cheap to fix once you know which kind you have. The expensive mistake is patching a gutter that should have been replaced, or replacing one that just needed a downspout cleared.
High Point Gutter is family owned, founded in 2016, with in-house crews working out of Woodinville and Federal Way for homeowners from Bellingham to Olympia. We are licensed, bonded and insured, we hold 600+ Google reviews at 4.9 stars, and our work carries a 10 year workmanship and 20 year manufacturer’s warranty.
Call 425-449-6622 or book a free gutter repair estimate. An estimator will find the leak, tell you whether it is a repair or a replacement, and put the price in writing. No pressure, no obligation.
Always on Point.