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Planter Box Waterproofing
Specialised waterproofing systems for planter boxes to prevent water leaks, soil saturation damage, and structural deterioration, ensuring plant health while protecting surrounding building elements.

Planter boxes may look like harmless landscaping features, but they are one of the most common sources of water ingress in modern buildings. Over time, water seeps through poorly detailed or deteriorated membranes, causing leaks into apartments, corrosion of reinforcing steel, and rot in timber framing.

At Atomic Projects, we approach planter box waterproofing as a structural protection system — not just a landscaping finish. Our solutions balance water retention for plant health with controlled drainage to protect the building.

Our Planter Box Waterproofing Process

  1. Assessment & Diagnosis
    • Inspect for existing leaks, drainage failures, and substrate damage.
    • Identify root ingress or chemical attack from fertilisers and soils.
  2. Demolition & Substrate Preparation
    • Remove all soil, plants, and existing lining materials.
    • Clean surfaces thoroughly to remove dust, efflorescence, and loose coatings.
    • Repair cracks, voids, and surface defects in the substrate.
  3. Drainage System Installation
    • Install or upgrade drainage outlets with puddle flanges to prevent leaks.
    • Fit protection layers such as drainage cell sheets to allow water flow while protecting the membrane.
  4. Membrane Application
    • Apply a root-resistant, chemical-resistant waterproof membrane system — either liquid-applied or sheet-based depending on the design.
    • Reinforce all joints, corners, and penetrations with bond breaker tape or fabric reinforcement.
    • Apply multiple coats to achieve full manufacturer-specified dry film thickness.
  5. Protection Layer & Refill
    • Install geotextile fabric above the drainage layer to separate soil from drainage cells.
    • Refill with appropriate soil media designed for planter boxes to prevent excessive water retention.
  6. Final Quality Control
    • Conduct flood testing before soil reintroduction to ensure watertightness.
    • Provide a full photographic QA record for compliance and warranty purposes.

Common Planter Box Waterproofing Failures We Repair

  • Missing or inadequate drainage outlets leading to pooling water.
  • Membranes damaged by root penetration.
  • Use of non-root-resistant membranes.
  • Under-thickness or single-coat membrane applications.
  • Soil placed directly on membranes without protection layers.

Why Atomic Projects for Planter Box Waterproofing

  • Root & Chemical Resistance: Systems designed to withstand fertiliser chemicals and aggressive root systems.
  • Compliant Detailing: All outlets, corners, and joints reinforced to prevent leaks.
  • Holistic Approach: Balances plant health with complete building protection.
  • Proven Track Record: Experience in podium gardens, rooftop landscaping, and ground-level planters.

Planter boxes are beautiful but dangerous when waterproofing is neglected. Our root-resistant, drainage-focused systems protect your building from hidden structural decay while keeping your landscaping thriving.

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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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