Remedial waterproofing in Sydney – defect rectification with new membrane installation on balcony surface.

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Wet Area Defect Repairs
Identify, rectify, and prevent failures in bathrooms, laundries, kitchens, and other wet areas by restoring waterproofing integrity, surface finishes, and drainage performance in full compliance with Australian Standards and NCC requirements.

Wet areas are among the most high-risk zones for building defects. A failed waterproofing system can lead to persistent leaks, structural deterioration, mould growth, and expensive litigation. Most failures stem from improper detailing, non-compliant installation, or substandard materials — all of which are avoidable when systems are installed and repaired correctly.

Atomic Projects delivers end-to-end wet area defect rectification, combining forensic investigation with Tier 1 installation standards to ensure failures are resolved permanently.

1. Investigation & Defect Diagnosis

Our process begins with a detailed inspection that includes:

  • Moisture mapping to trace the spread of leaks beyond visible areas.
  • Tile and substrate testing to identify hollow spots, drummy tiles, and adhesive failure.
  • Membrane integrity testing using electronic leak detection or flood testing.
  • Assessment of falls to floor wastes for compliance with AS 3740.

We determine whether the issue is isolated (e.g., a cracked tile) or systemic (e.g., membrane breach across the entire floor).

2. Safe Demolition & Containment

Failed surfaces and substrates are removed with strict dust control and occupant protection measures. This often includes:

  • Removal of tiles, screeds, and compromised bedding layers.
  • Isolating work zones to prevent dust and debris spread.
  • Salvaging and protecting fixtures where possible.

3. Substrate Repair & Preparation

A new waterproofing system can only perform as well as the surface it’s applied to. We ensure:

  • Concrete or fibre cement sheeting is structurally sound and securely fixed.
  • Any cracks are repaired with epoxy injection or patching compounds.
  • Falls are corrected during re-screeding to direct water to the waste.

4. Installation of New Waterproofing System

We install fully compliant Class III waterproof membranes, selecting liquid-applied, sheet, or hybrid systems based on site conditions. Our method includes:

  • Priming all substrates with manufacturer-approved primers.
  • Installing bond breakers at all junctions.
  • Wrapping membranes up vertical surfaces to the correct height.
  • Forming waterproof junctions at floor wastes, hob junctions, and wall penetrations.

5. Tiling & Finishing

Once the membrane has cured, we:

  • Install tiles using flexible adhesives to accommodate movement.
  • Grout with mould-resistant formulations.
  • Apply silicone sealant at all movement joints and junctions.

6. Quality Assurance & Compliance Certification

We issue:

  • Membrane manufacturer warranty documents.
  • Photographic QA records of each installation stage.
  • Waterproofing compliance certificates in line with Australian Standards.

Outcome:

Our wet area defect repairs restore your bathroom, laundry, or kitchen to full compliance and watertight integrity, eliminating ongoing leak risks while improving functionality and aesthetics. We don’t just patch symptoms — we rebuild the system so it performs flawlessly for the next 20+ years.

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If you’re ready to get started, we're ready to help.

Take the next step and let’s build something that lasts.

 

📞 Call Us: 0410 515 509

✉️ Email Us: hello@atomicprojects.com.au

 

— Ben Tran, General Manager, Atomic Projects

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