A gutter leaking at the joint: what it usually means

Where exactly the water comes from tells you the cause

The precise point of the drip matters more than how much water there is. A steady drip from a straight seam or corner joint, especially one that only appears during or just after rain, points to a failed seal at that joint. If the drip appears well after the rain has stopped, the gutter is holding water somewhere upstream and slowly releasing it.

A leak that appears at a bracket, where the gutter is screwed to the fascia, usually means the fixing has worked loose and the gutter has dropped slightly at that point, letting water find a way out rather than flow past. A leak along a flat run rather than at a joint at all suggests a crack or a hole in the material, which is a different problem to a joint seal failure.

Before doing anything else, dry the area with a cloth on a dry day and watch what happens next time it rains. Seeing exactly where the first drop appears saves guesswork and, if you do call someone out, means the visit is quicker and cheaper.

Loose brackets and the wrong fall

Gutters are meant to run at a slight, continuous fall towards the downpipe, usually only a few millimetres per metre, so water never sits still in them. A bracket that has pulled away from the fascia, whether from age, rot in the timber behind it, or simply age of the fixing, lets that section sag out of line. Once a low point forms, water pools there instead of draining away, and the joint at that spot takes pressure it was never sealed to handle.

This is common on older wooden houses in Nõmme and Kalamaja, where the fascia board itself has softened with age and no longer holds a screw firmly, and on panel buildings where brackets were fitted decades ago and have simply corroded. In both cases the seal at the joint may be perfectly fine; it is failing because the gutter around it has moved.

A quick way to check is to look along the gutter from ground level on a dry day: any obvious dip or sag in an otherwise straight line usually marks the loose bracket, even before you see standing water there.

What you can check yourself before repairing anything

A few checks from a stable ladder, on a dry day, tell you most of what you need to know without any tools. Look for standing water sitting in the gutter well after rain, check whether brackets feel firm when you push gently on the gutter near them, and look at the joint itself for a visible gap, a cracked bead of old sealant, or a seam that has pulled apart slightly.

It is also worth checking that the problem is not simply blockage. Leaves and grit sitting at a joint can hold water against the seal and make a sound joint look like it is failing; clearing debris and testing again with a hose sometimes solves it outright.

• Run a hand along the inside of the gutter near the leak and clear any debris
• Check whether the section sags or holds a visible pool of water
• Press gently on the gutter near each bracket to feel for movement
• Look at the joint for a cracked, shrunk, or missing bead of sealant
• Note whether the drip appears during rain or only afterwards
• Check the fascia board behind the bracket for soft or rotten timber

When a reseal is enough and when a section needs replacing

If the gutter itself is straight, the brackets are firm, and the fault is a cracked or perished bead of sealant at a single joint, a reseal is usually enough. Old sealant is cut out, the joint is cleaned and dried, and new silicone sealant is applied; this is a job we quote from 45 € and it typically takes under an hour once access is sorted.

If the section sags because a bracket has failed, resealing the joint alone will not hold, since the movement that broke the seal is still there. The bracket needs refitting, and if the fascia behind it is soft, that timber needs attention too before a new fixing will hold anything. Only once the gutter runs true again does resealing the joint make sense.

A cracked or split length of gutter, rather than a joint problem, is different again: sealant will not hold a crack in the material itself, and that section needs replacing outright. If you are not sure which of these you are looking at, sending us a couple of photos of the joint and the run either side is usually enough for us to tell you which it is.

What is urgent and what can wait

A joint dripping onto a path or a bit of lawn is an inconvenience, not an emergency, and can wait for a convenient time, particularly outside the wettest months. A joint dripping directly against a wall, however, is worth dealing with sooner, since repeated wetting of the same spot on render or timber cladding can lead to damp finding its way into the wall build-up over time.

A gutter sagging badly enough to pull away from the fascia, or a bracket that has come away entirely, is worth treating as more urgent, since a full section can come down under the weight of water or ice. If you notice this, it is worth having it looked at before the next heavy rain rather than after.

How we usually go about fixing it

We start by finding the actual source of the leak from a ladder, checking the fall of the gutter and the condition of the brackets either side of the joint before touching anything. If it is a straightforward seal failure on a gutter that still runs true, we clean out the old sealant and reseal the joint on the spot, generally within the visit.

If a bracket needs refitting or the fascia behind it needs attention, that is hourly work, charged from 39 € with a 25 € call-out in Tallinn that comes off the bill if we go ahead. For a korteriühistu or a landlord managing several buildings, this kind of gutter check often sits naturally alongside our office and building maintenance service, from 49 € an hour, where we look at several items in one visit rather than one at a time.

While we are up there, it is often worth having the gutters cleaned out at the same time if they have not been done in a while, since trapped debris is what causes a lot of joint problems in the first place; that is a separate job, quoted from 120 €, but doing both together saves a second visit.