Signs Your Gutters Need Replacing, Not Just Cleaning

Cleaning won't fix these problems

A lot of overflow issues come down to leaves and silt, and a good clean sorts them out. But some gutters are past that point, and no amount of clearing will stop the water going where it shouldn't. Here's how to tell the difference.

Rust holes, especially at the corners

Once rust has eaten through at a joint or corner, water finds that hole before it finds the downpipe. Kylie B.'s gutters were "rusted through at the corners" — that's a replacement job, not a cleaning one, and it tends to get worse through a wet winter if it's left.

Joints that drip after rain has stopped

If water is still coming through a seam an hour after the rain has eased, the joint has failed rather than just being blocked. Cleaning might reduce the amount briefly, but the seal itself needs replacing.

Gutters that hold water after the rain stops

This usually means the fall is wrong — the gutter isn't angled enough to drain to the downpipe. On older homes, this often happens gradually as the fascia moves or the brackets sag. You'll see standing water or watermarks well after the sky has cleared.

Overflow that happens every time it rains, not just in heavy storms

If your gutters overflow in ordinary rain, not just downpours, the problem is usually structural rather than a buildup of debris.

Box gutters backing up into the eaves

On period homes, a box gutter that overflows into the eaves rather than running off cleanly is often an ageing lining issue rather than a blockage. Mark H.'s Edwardian had exactly this, and relining the box gutter and adding a rainhead sorted it, rather than repeated cleaning.

What to do about it

Our rule of thumb matches the obvious signs: rust holes, joints that drip, or gutters that hold water after rain are the usual indicators that replacement is worth looking at ahead of another clean. If you're not sure which camp your gutters fall into, send a few photos from the ground, including close-ups of any rust or staining under the gutter line. That's usually enough for us to give an initial view before anyone needs to get up on a ladder.

If it does turn out to be a cleaning job rather than a replacement, that's a far simpler fix, and worth ruling out first.