Roots do not break into pipes, they find openings that already exist
A sewer pipe is the best-watered, best-fertilised spot on any block, and tree roots are extremely good at finding it. But roots cannot drill through sound pipe. What actually happens is that the pipe offers them a way in first: a joint that has moved, a mortar or rubber seal that has perished, or a hairline crack from ground movement. Moisture escaping from that defect creates a gradient in the soil, fine feeder roots follow it to the source, and a root thinner than a hair enters the gap. Once inside, it has unlimited water and nutrients, so it thickens, expands the opening, and grows a mat of fine roots downstream of the entry point. That mat is what catches paper and waste and gives you a blockage. The tree did not attack the pipe. The pipe invited it.
Why Gold Coast homes from the 60s to the 80s are the main victims
Housing built before roughly the mid 1980s on the Gold Coast mostly drains through earthenware pipe laid in short lengths, which means a joint every 600mm or so, and every joint is a candidate entry point after decades of ground movement and seal decay. Modern PVC drains have far fewer joints, solvent-welded and slightly flexible, so root problems in post-90s homes are much rarer and usually trace to a damaged fitting rather than systemic decay. Add the Gold Coast's growing climate, where figs, umbrella trees, jacarandas and camphor laurels never really stop growing, and an older earthenware line without root history is the exception, not the rule.
Cutting roots out is a treatment, not a cure
An electric eel or high-pressure jetter will cut the root mat out and restore full flow, and for $250 to $400 as of 2026 it is the right immediate response to a blockage. But be clear about what it does: it prunes the root back to the pipe wall and leaves the entry point wide open. The root system responds to pruning the way your hedge does, with vigorous regrowth, and in our experience the same line blocks again in 6 to 12 months, sometimes faster after a wet summer. There is nothing wrong with choosing an annual clear as a strategy, and for some owners on a budget it is the rational choice, but you should choose it knowing it is a subscription, not a fix.
Your options, honestly compared
| Option | Typical Gold Coast cost as of 2026 | How long it lasts |
|---|---|---|
| Machine clear of the root blockage | $250 to $400 | Typically 6 to 12 months before regrowth |
| CCTV inspection to map every entry point | $200 to $350, or $120 to $180 added to a clear | Diagnosis, not a fix |
| CCTV plus jetting plus condition report | $500 to $900 | Clean pipe plus the evidence to decide properly |
| Spot repair of one bad section | $800 to $1,800 | Permanent for that section |
| Relining the compromised run | $400 to $600 or more per metre installed | Permanent, seals every joint in the lined run |
| Full excavation and replacement | $5,000 to $15,000 plus | Permanent, the fallback where lining is unsuitable |
Relining stops roots because it removes every joint at once
A cured-in-place liner is a resin-saturated sleeve pulled or inverted through the existing pipe and cured hard against its walls, creating a continuous jointless pipe inside the old one. Roots lose every entry point in the lined section in one operation, with no excavation through your driveway, slab or landscaping. That is why it is the standard permanent answer for root-affected earthenware. The honest caveats: badly collapsed or fully deformed pipe cannot be lined and needs excavation, junctions need proper reinstatement by someone who knows what they are doing, and a liner is only as good as the cleaning and inspection before it goes in. We line off recorded footage, and you get before and after video, not just an invoice.
Do not bother with the folk remedies
Copper sulphate down the toilet, root-killing foams and planting rules of thumb all circulate as advice. The chemicals knock back roots inside the pipe temporarily, do nothing about the entry points, and are unkind to the tree and everything downstream. Removing a mature tree often does not help either, because the root mass keeps drawing on the moisture source for years. Fix the pipe and the roots become irrelevant, which is the only version of this that stays fixed. In Queensland, drain repair and relining is licensed drainage work, so whoever you use, check the licence before the van arrives.
Sick of clearing the same drain every year? Call Hills Plumbing & Gas on 0472 657 042 for a camera inspection and a fixed relining quote from the footage, or book through our pipe relining service page. QBCC licence 15243081.
Sources: Plumbing and Drainage Act 2018 (Qld) and QBCC drainage licensing; AS/NZS 3500.2 sanitary drainage requirements. Drainage repair and relining is licensed work in Queensland, check credentials before you book anyone.