No-dig pipe relining (also called cured-in-place pipe lining or CIPP) is one of the more important plumbing innovations of the last 20 years. It allows damaged sewer drains to be repaired without excavation, preserving driveways, landscaping, slabs and structures while delivering a new pipe within the old one. We use it regularly on Gold Coast jobs.
How relining works
- Camera survey to map the damaged drain section and confirm it is suitable for relining.
- Cleaning the existing drain via jet-rodding to remove debris, scale and root material.
- Measurement of length, diameter and any bends.
- Preparation of the liner, a flexible fabric tube saturated with epoxy resin, cut to length.
- Insertion of the liner into the drain through an access point (existing inspection point or temporary access).
- Inversion / inflation of the liner so it pushes against the inside of the drain wall.
- Curing via UV light, hot water, or ambient temperature depending on the system. Typically 1-4 hours.
- Reinstating lateral connections with internal cutting equipment.
- Final camera inspection to confirm the new pipe is sound.
What relining can fix
- Cracked joints in vitrified clay or PVC drains
- Root invasion points
- Minor cracks in pipe walls
- Pipe corrosion (galvanised drains)
- Pinhole leaks in the drain itself
- Sections where general pipe condition is degraded but not collapsed
What relining cannot fix
- Fully collapsed pipe sections (cannot insert a liner into a collapsed pipe)
- Major bends or angle changes (some systems handle these, some do not)
- Significantly undersized or oversized pipes (liner needs to match the host pipe)
- Sags in the drain (low spots, the liner takes the shape of the host so the sag persists)
- Pipes that need to be replaced for other reasons (e.g., to allow major renovation)
Cost
- Per-metre installed price: $300-500 typical on the Gold Coast
- Minimum job cost: often $1,500-2,500 for setup and mobilisation regardless of length
- 3-5 metre repair: $1,500-3,000
- 10-15 metre repair: $3,500-7,500
- 30+ metre repair: $10,000-15,000
Cost depends on diameter, accessibility, and total length. Larger diameter and difficult access increase per-metre cost.
Lifespan and warranty
Cured epoxy liners have a 25-50 year design life. Most systems carry a 25-year manufacturer warranty on the liner itself. The cured liner is structurally strong, often stronger than the original pipe.
How it compares to dig-and-patch
| Factor | Relining | Dig-and-Patch |
|---|---|---|
| Cost (5m repair) | $1,500-3,000 | $1,500-4,500 |
| Cost (15m repair) | $5,000-7,500 | $4,500-12,000+ |
| Garden / driveway disruption | Minimal | Significant |
| Reinstatement cost | Negligible | $500-5,000+ |
| Time on-site | 1-2 days | 1-4 days |
| Suitable for collapsed pipe | No | Yes |
| Lifespan | 25-50 years | 50+ years |
When relining wins
- Drain runs under driveway, slab, paving, or established landscaping
- Long run (10+ metres) where excavation cost would dominate
- Limited site access for excavation equipment
- Structural features above the drain (deck, pool, building)
- Time-sensitive (relining is faster than dig-and-patch)
When dig-and-patch wins
- Short repair section (1-3 metres) with easy access
- Pipe is fully collapsed and cannot be relined
- Major bends or angle changes that the liner system cannot handle
- Pipe needs to be replaced rather than repaired (e.g., undersized for current use)
Common Gold Coast scenarios where we recommend relining
- Older coastal homes (Burleigh, Palm Beach, Currumbin) with vitrified clay sewer drains running under landscaped front yards. Avoid garden destruction.
- Inland suburban (Robina, Mudgeeraba, Carrara) with original 1970s-80s drains running under driveways. Avoid driveway breakup and re-laying.
- Premium canal-front homes (Mermaid Waters, Paradise Point) with extensive landscaping and high reinstatement costs. Avoid disruption to premium gardens.
- Apartment buildings where stack drains run inside walls between floors. Relining accesses through existing inspection points without opening structure.
What we do
We coordinate the camera survey, the relining specialist (typically a sub-contractor with the specialist equipment), and the final inspection. You get a single quote covering everything. Job typically takes 1-2 days end-to-end.
The liner materials we install and why
Not all pipe liners are the same product. The two systems we install most often on Gold Coast jobs are Brawoliner (German manufactured, fabric tube saturated with epoxy resin, cured ambient or with hot water, suited to bends and changes in diameter) and various epoxy-based fibreglass systems cured with UV light. Brawoliner is our default choice for residential sewer applications because of its flexibility through bends and lateral connections, which is exactly where most Gold Coast residential drains fail (root entry at junction points and bends). The fibreglass systems are stronger structurally and slightly stiffer, better suited to long straight runs under commercial properties. Both deliver 25-50 year design life when installed correctly, both carry manufacturer warranty around 25 years. The cost difference between systems is marginal on residential jobs, the bigger cost driver is access and setup. We choose the system based on the diagnosed drain condition, not based on what we have on the van that day. Worth asking any quoting plumber which system they propose and why, an operator who cannot answer or just offers whatever is cheapest is not running the diagnosis properly. Liner specification matters because a mismatched system to the drain condition will either fail prematurely (too thin or wrong material for the loading) or be unnecessarily expensive (over-specified for a simple residential application).
Site setup and what your driveway looks like during a reline
Despite being called no-dig, relining still requires significant on-site equipment and access. A typical residential reline job has us bringing a service van, a curing trailer or rig, a separate jet-rod truck for pre-cleaning, and sometimes a sub-contractor specialist if the curing equipment is hired in. Total on-site footprint is usually two vehicles plus a working zone of roughly 4 by 8 metres around the primary access point. We need power (we run off generator or off-site mains via long lead), water supply for the jet-rod and for hot-water cured systems, and a clear path between the access point and our equipment. On suburban Robina or Mudgeeraba blocks this is straightforward, the front yard or driveway accommodates it easily. On acreage in Tallai or Bonogin with long driveways and remote access points, we may need to set up closer to the work zone and trail extended hoses and cables. On narrow Surfers or Broadbeach unit complexes with restricted vehicle access, we coordinate with body corp or council to get permission for short-term parking and equipment placement. Site setup typically adds 1-2 hours to the start and end of each job day. We plan this at quote stage so you know what to expect, and we do not promise driveway-clear access without confirming the realistic site layout.
What goes wrong with cheap or rushed relining
Done correctly, a reline is one of the most reliable structural plumbing fixes you can buy. Done poorly, it creates problems that are worse than the original issue. The failure modes we have inherited from other operators' work include incomplete cure (liner sets only partially, especially in cold weather or with ambient-cure systems pushed past their working time), wrinkling at bends (liner doesn't seat properly against the host pipe, creates flow restriction and catch points for future blockages), missed lateral connections (liner blocks off a branch drain that wasn't reopened with internal cutting), and host pipe collapse during installation (rare but happens if the host pipe was structurally too weak to support the inflation pressure). The cost of a failed reline is significant, you've paid $3,000-7,000 for the reline, then need to either reline-the-reline (more difficult and expensive) or excavate and dig-and-patch to remove the failed liner. Our quality assurance process includes pre-reline camera survey of the cleaned pipe, photographic record of liner specification and resin batch, monitoring of cure conditions and time, post-cure camera verification of the full liner length and every lateral, and a written installation report with all data. If a quoting plumber cannot describe their QA process in similar detail, you are at risk of paying for work that may not hold. Ask the question at quote stage, the better operators will welcome it.
The body corp and apartment angle
For apartment buildings and townhouse complexes across Broadbeach, Surfers, Main Beach and Burleigh, reline is often the only viable structural fix for failing common sewer stacks. Excavating through a ground-floor unit or basement plant room to access a vertical stack is not realistic in most circumstances, but lining from existing inspection points is. Body corp committees considering reline scope on a shared stack should think about three things. First, the work coordination across multiple units, the stack serves all the units above it and the work needs to align with reasonable disruption windows (usually we run reline on weekdays during business hours with notice given to all affected units, total disruption 1-2 days for a typical 10-unit stack). Second, the cost allocation under the body corp agreement, common-stack work is usually funded from the sinking fund or via special levy across all owners, not just the unit experiencing the blockage symptoms. Third, the after-life of the reline, with documentation handed to the body corp managers for the records and the warranty registration in the body corp's name. We have run reline jobs for several Gold Coast body corps across Broadbeach, Surfers and Burleigh, and the pattern is the same, the upfront cost is significant ($15,000-40,000 typical for a 10-15 unit stack) but the alternative is recurring sewage incursion into ground-floor units with cleanup costs and owner-corp liability that quickly exceeds the reline cost.
Reline warranty and what it actually covers
The 25-year manufacturer warranty on most cured-in-place liners is real but worth understanding in detail before you bank on it. The warranty typically covers the liner material against structural failure (delamination, cracking, separation from the host pipe) for the warranty period, conditional on the liner being installed by a manufacturer-approved installer following the specified procedures. The warranty does not cover damage from external factors (heavy vehicle loading over the drain, ground movement that exceeds the design tolerance, future excavation work that damages the liner), and it does not cover blockages or maintenance issues unrelated to the liner itself. The warranty is transferable to subsequent property owners in most cases, which adds value at sale time, document the warranty paperwork with the property records. We register the warranty in the homeowner's name at installation and supply the paperwork as part of the completion handover, the warranty is then valid against the manufacturer regardless of whether we remain trading. The installer warranty (our workmanship guarantee) is separate, typically 12-24 months, covering install defects that show up early. The combination of the two warranties provides good coverage, but the practical track record matters more than the paperwork. Properly installed liners typically perform well beyond the warranty period, we have inspected lined drains 15-20 years old on the Gold Coast that are still in excellent condition with no degradation visible.