Gutters & Drainage
Leaking Gutter Repairs in Sydney
We find where the water is really getting in, not just where it drips out.
A leaking gutter rarely leaks where you see the drip. Water tracks along metal and timber before it lets go, so the visible drip is often a metre from the actual fault. We trace it back to the source — a failed joint, a rust pinhole, a gap behind the gutter, or water backing up over the rear edge — and fix that, so the leak doesn't just move down the run.
Front leaks versus back leaks
Water coming off the front of the gutter usually means overflow — too much water, a blockage, or lost fall. Water appearing behind the gutter, staining the fascia or running down the wall, usually means the gutter is overflowing over its rear edge or the roof sheet or tile isn't kicking water into the gutter properly. These have completely different fixes, so we work out which one you have before touching anything.
Back-of-gutter leaks are the ones that quietly rot fascia and get into wall cavities, so we take them seriously even when the volume seems small.
Joints, seams and pinhole rust
The classic slow drip is a lap joint where the old sealant has hardened and cracked, or a pinhole where rust has eaten through. We strip failed sealant back to clean, dry metal, re-rivet if needed and re-seal with a proper neutral-cure product. Rust pinholes get patched if the surrounding metal is sound, or flagged for section replacement if it's peppered with them.
Leaks that aren't actually the gutter
Sometimes the water blamed on a gutter is coming from failed valley flashing, a lifted roof sheet, or missing pointing above the eaves. We check the roof line feeding into the gutter so we don't seal a joint that was never the problem while the real leak keeps soaking your ceiling.
What's Included
- Tracing the leak back to its true source, not just the drip point
- Diagnosis of front (overflow) versus rear (back-of-gutter) leaks
- Stripping and re-sealing of failed joints and laps
- Patching of rust pinholes where the surrounding metal is sound
- Check of adjacent valleys, flashings and roof edge feeding the gutter
- Water test to confirm the leak is genuinely gone
Frequently Asked Questions
Why is water leaking behind my gutter and down the wall?
That's a back-of-gutter leak — water is getting over the rear edge, often because the gutter overflows or the roof edge isn't directing water into it. It's the type that rots fascia and enters walls, so it's worth fixing quickly. We check the roof edge and fall, not just the gutter itself.
My gutter only leaks in heavy rain — is it still a problem?
Yes. Leaking only in heavy rain usually means overflow rather than a hole — the gutter or downpipes can't cope with the volume. Sealing joints won't fix that. The real answer is often clearing blockages, correcting fall, or adding capacity, and we'll tell you which applies.
Can a leaking gutter cause damage inside the house?
Absolutely. A back-of-gutter leak can wet the top plate, run into wall cavities and stain ceilings, and it rots fascia over time. The volume looks small but the water is constant every time it rains, so a persistent leak is worth attending to before it becomes a repair bill.
Is it worth sealing an old rusty gutter that leaks?
If it's one leak on otherwise solid metal, sealing is sensible. If the gutter is rusting through in multiple places, sealing one spot just shifts the leak along and you'll be back on the ladder next month. We'll give you the honest call on whether repair or replacement is smarter.
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