Frequently Asked Questions

About Your Wall

  • The property owner is generally responsible for maintaining the revetment wall along their canal frontage, not the council. Local councils including Gold Coast City Council and Moreton Bay Regional Council have requirements relating to waterfront property maintenance.

    If a wall fails and causes damage to neighbouring properties or waterways, the owner may be liable. Regular inspection and maintenance help identify issues before they become major repairs.

  • Some warning signs include cracking, spalling concrete, uneven ground behind the wall, gaps forming between the wall and slab, blocked weepholes, or leaning wall panels.

    However, many important issues develop below the waterline or behind the wall and are not visible from your yard. Regular inspections are the best way to understand the true condition of your wall.

  • A revetment wall is the structure that protects your waterfront property from tidal movement and erosion. It holds the land behind the wall in place and manages water pressure through drainage systems such as weepholes.

    Most canal walls across South East Queensland are now decades old and require regular maintenance to remain in good condition.

  • Weepholes are drainage points built into canal walls that allow water pressure behind the wall to escape as the tide drops.

    When they become blocked by marine growth, sediment or failed filters, pressure builds behind the wall. Annual weephole cleaning and filter replacement is one of the most important maintenance tasks for extending the life of a canal wall.

  • Spalling occurs when concrete begins to crack and break away from the wall surface. It is usually caused by saltwater reaching the reinforcing steel inside the concrete.

    As the steel corrodes and expands, it causes the surrounding concrete to crack and deteriorate. Early repairs are much simpler than repairing advanced concrete failure.

  • Construction joints are the gaps between concrete wall panels that allow movement and expansion. Over time, the original sealant can deteriorate due to age, marine growth and tidal exposure.

    When joints fail, soil can escape from behind the wall, increasing the risk of subsidence. Resealing joints restores the barrier and helps protect the material behind the wall.

About The Inspection

  • We inspect your wall from our AMSA-approved commercial punt at low tide, allowing us to assess the full wall face including areas below the waterline.

    The inspection covers the key condition areas for revetment walls, including weepholes, joints, spalling, cracking, subsidence, footing condition and panel movement.

    After the inspection, we provide a written condition report with photographs and a fixed-price quote for any recommended work.

  • Most inspections take approximately 15 to 30 minutes on site. Your written report is generally emailed within a few days.

  • No. We complete inspections from the water side of the wall and do not need access through your property.

    As long as we can access the canal frontage, the inspection can proceed without you being home.

  • We recommend annual inspections and maintenance for most canal walls.

    Some walls in good condition may require less frequent inspections, while walls with existing issues or a history of deferred maintenance may need closer monitoring.

  • Our busiest Bribie Island maintenance period is generally between March and October when weather and tidal conditions are more predictable.

    Urgent inspections and buyer's reports can be arranged outside this period where conditions allow.

  • Our work is tide and weather dependent. If conditions prevent us from completing a scheduled job, we contact you as soon as possible and arrange a new time.

About Buyer's Reports

  • A buyer's report is an independent assessment of a canal wall before purchasing a waterfront property.

    It identifies the current condition of the wall, recommended repairs and potential future maintenance requirements so buyers can make an informed decision before settlement.

  • A buyer's report is $450 plus GST.

    If you proceed with recommended repair work within three months of settlement, $225 plus GST of the inspection fee is credited towards your first invoice.

  • Yes, where scheduling allows.

    When you contact us, provide your contract deadline and we will confirm whether we can complete the inspection and report within that timeframe.

  • Yes. We are happy to discuss the findings, explain recommended repairs and answer any questions about the report.

About Canal Wall Doctor

  • Our main service areas are Bribie Island and the Gold Coast canal systems, including Banksia Beach, Bongaree, Sovereign Islands, Runaway Bay, Mermaid Waters and Paradise Point.

    We also assist with enquiries from other South East Queensland waterfront areas.

  • Canal Wall Doctor is the specialist canal wall inspection and maintenance division of Gold Coast Barges, a Queensland marine construction company established in 2007.

    Canal Wall Doctor focuses on inspections, annual maintenance, joint resealing, spalling repairs and related wall services. Gold Coast Barges provides larger marine construction capability for major structural works when required.

  • Yes. Canal Wall Doctor is fully insured, and our vessels and equipment comply with Australian Maritime Safety Authority requirements.

Who We Work With

  • Yes. We provide inspection, maintenance and reporting services for waterfront body corporates across Bribie Island and the Gold Coast.

  • Yes. We assist councils with canal wall maintenance services including weephole maintenance, joint resealing and spalling repairs on council-managed waterfront infrastructure.

  • Yes. We work with property managers, developers and real estate professionals requiring ongoing maintenance programs, wall assessments and buyer's reports.

About Repairs and Costs

  • Annual weephole cleaning and filter replacement starts from $300 plus GST for smaller frontages and $450 plus GST for most standard residential properties. For larger frontages, our weephole maintenance costs $600 plus GST.

    Repair costs vary depending on the inspection findings. All recommended works are quoted upfront with fixed pricing and no obligation to proceed.

  • Routine maintenance such as weephole cleaning, joint resealing and minor concrete repairs generally does not require approval.

    Larger structural repairs may require engineering involvement and approvals. We will advise you if your repair requires additional certification.

  • Contact us as soon as possible on 0427 949 163.

    If there is a risk of immediate failure, we prioritise urgent assessments. Until the wall has been inspected, avoid placing heavy loads close to the wall edge.

About the Annual Maintenance Program

  • After your initial inspection and any required repairs, we can add your property to our annual maintenance schedule.

    Each year we remind you when your service is due. The annual service includes weephole cleaning, filter replacement and a condition check of the wall.

  • After completing initial works, customers are automatically added to our annual reminder schedule.

    If you would like to join the program, contact us and we can add your property to the next available service schedule.

  • Weephole plugs and filters are warranted for 5 years, and joint reseals are warranted for 3 years, subject to ongoing annual maintenance.

    Keeping your weepholes maintained helps protect your repairs and ensures warranty conditions are met.