First check for signs of standing water and sagging.
Gutter downpipe leaking.
See below for a shopping list and tools subscribe to this old house.
If that doesn t work use drain rods to unblock it from the top.
Do not apply silicone on top of silicone or on top of the old gutter sealant.
Rain gutters take a lot of abuse.
Water will eventually find its way under both layers of silicone and back to the original leak location.
Standing water in gutters eventually will rust galvanized steel seams or seep through the seams in aluminum gutters.
Rushing water during rainstorms exposure to weather extremes heavy loads of snow in the coldest climes clogs of fallen leaves and the general ravages of time.
Gutter leaks usually start at rusty spots or seams that have opened up because of expansion and contraction.
See pic for reference.
Household gutter systems are prone to leakage caused by separated or leaking gutter downspouts a gutter downspout is in the form of a hollow pipe like tube that collects the drainage water from the gutter and drains it away into the drainage or water renewal system.
If your gutters are leaking the prime suspects are the joints between sections.
Here s two ways to not repair a leaky gutter and one solid way to do the job correctly so that it holds for years not weeks.
This guide will teach you a few simple repairs that will keep your downspout joints tight and reliably leak free for many years.
How to fix leaking rain gutters.
Adjust or add gutter hangers as needed see more about hangers.
Over time gravity can cause joints to open up or they can get jostled from below and come loose.
Cover the drain turn on the water in a garden hose and push it up the pipe to dislodge the debris.
This old house general contractor tom silva has a fast fix for a dripping rain gutter.
We would never recommend replacing just the seal rather than the whole fitting.
If your gutter is still basically sound the easiest way to stop the leak is by covering the damaged area with roof and gutter repair tape available at home centers and hardware stores.
If the downpipe is blocked try unblocking it from ground level.
On an old plastic gutter system any type of outside force or interference on the gutter or fittings can cause a breakdown in the seals that will manifest itself as a leak.