Waterproofing and Water Ingress Repairs

Is Your Property Struggling with Leaks or Water Ingress?

Leaking basements, balconies, rooftops, or facades aren’t just inconvenient — they signal a breakdown in your building’s protective envelope. Left unresolved, water penetration leads to structural damage, rising maintenance costs, and loss of asset value.

What Happens When Waterproofing Fails?

When waterproofing systems break down, water doesn’t just “seep in” — it penetrates, spreads, and damages everything it touches. The longer it’s ignored, the more destructive (and expensive) the outcome.

1. Structural Damage

Water is relentless. Once it breaches a failed membrane, it corrodes reinforcement, weakens concrete, rots timber, and damages finishes. What begins as a damp patch can evolve into concrete spalling, steel corrosion, or even structural instability.

In underground basements, hydrostatic pressure can force water through the smallest gaps, leading to major failures.

2. Health & Safety Risks

Leaks don’t stay hidden. They create mould, mildew, and poor air quality, impacting occupant health. Wet areas and water ingress also increase slip hazards — especially in car parks, podiums, and stairwells.

In severe cases, leaks compromise fireproofing, electrical systems, or lift shafts — turning a maintenance issue into a real safety hazard.

3. Escalating Costs & Disruption

Every month of delay increases the cost of remediation. Early-stage leaks can often be fixed with targeted repairs, but neglected ingress usually demands full membrane replacement or large-scale invasive works.

This means longer downtime, higher budgets, and disruption for tenants, owners, and managers. In insurance and compliance terms, ignoring waterproofing issues often leads to disputes, higher premiums, and regulatory headaches.

Fix Waterproofing the Smart Way – Our Approach

We don’t just seal leaks — we solve the roof cause and protect the whole property for the future..

1. Diagnose the Source.

Waterproofing failures often show up far from the entry point. We use testing and investigation to find the true cause before any repair begins.

2. Match the Repair to the Environment

Every building faces unique pressures — from rooftop UV exposure to below-ground hydrostatic pressure. We match systems to your actual conditions.

3. Integrate Repairs with the Whole Property

We don’t do “band-aid” patching. Our repairs tie into surrounding structure and drainage, ensuring protection across the whole system.

4. Cut Costs by Avoiding Rework

We select premium engineered systems, proven detailing, and correct installation to stop repeat failures.

5. Prove It with Evidence

Every project is backed by QA reporting, moisture testing, and photos — so you know your building is watertight and future-ready.

Types of Waterproofing & Remediation Services We Provide

Our waterproofing solutions cover every scale of need — from small leak repairs to full building remediation — ensuring durability, compliance, and long-term performance.

Basement & Negative Waterproofing
Specialised waterproofing solutions applied to the internal face of concrete walls and slabs to stop water ingress where positive-side access is impossible, such as basements, lift pits, and retaining walls.
Balcony & Terrace Waterproofing
Installation of high-performance waterproofing systems for balconies and terraces to prevent leaks, structural damage, and costly repairs — ensuring long-term protection and compliance with Australian Standards.
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.
Podium & Roof Deck Waterproofing
High-performance waterproofing systems for podium slabs, rooftop terraces, and communal open spaces to protect against water ingress, thermal movement, and long-term weather exposure.
Bathroom & Wet Area Waterproofing
Installation and remediation of waterproofing systems in bathrooms, laundries, and other wet areas to protect structures from moisture damage, ensure compliance with Australian Standards, and extend the lifespan of finishes.
Sealant Replacement & Joint Remediation
Removal and replacement of failed, cracked, or deteriorated sealant in façades, windows, expansion joints, and other critical interfaces to restore weatherproofing and movement capability.
Waterproofing for Heritage Structures
Design and installation of discreet, high-performance waterproofing systems for heritage-listed and historically significant buildings — protecting against water ingress while preserving architectural authenticity.

Success Stories

See how we’ve turned complex building defects into lasting value — with minimal disruption and maximum confidence.

Explore our projects

A Remedial Waterproofing Transformation: From Leaks to Luxury.

Heritage Facade and Colorbond Roof Replacement Success Story.

Colorbond Roof Replacement: Defying Downpours.

Reviving a Concrete Pool: From Bad to Brilliant

Why Atomic is the best in
Waterproofing & Water Ingress Repairs  

It’s not just how we build — it’s the confidence we deliver. Our results maximise value, minimise disruption, and guarantee durability.

Specialist Focus

Remedial building is all we do — not an add-on service.

Engineer & Strata Partnerships

Trusted by leading remedial engineers and strata managers across Sydney.

Premium Quality

Tier 1 standards without Tier 1 overhead.

Proven Track Record

Successful delivery across residential towers, commercial sites, heritage buildings, and insurance works.

Client Care

We prioritise minimal disruption, clear reporting, and accountability from start to finish.

Take the next step.

Let’s Build Something That Lasts

If you’d like to speak with our team, we’re ready to help.


‍Phone: Call us at 0410 515 509
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‍Email: Send us a message at hello@atomicprojects.com.au
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Frequently Asked Questions

Q1: Why does waterproofing fail?

A: Most failures come down to poor installation or ageing systems. Common causes include:

• Incorrect substrate preparation or detailing at junctions.

• Movement in the structure not accommodated with joints.

•Cheap or incompatible membranes and sealants.

• Blocked or inadequate drainage.

• Sun, traffic, or chemical exposure degrading the system over time.

When waterproofing fails, it quickly leads to leaks, corrosion, structural damage, and disputes.

Q3: What does waterproofing remediation involve?

A: True remediation is not a patch job. It requires:

• Investigation & testing to confirm leak paths.

• Full membrane removal where systems have failed.

• Substrate rectification (screed, falls, drainage points).

• New waterproofing system installation — liquid, sheet, or combination.

• Protective finishes (tiles, topping slabs, coatings).

At Atomic Projects, every system is installed under ITPs and manufacturer specifications, ensuring DBP compliance.

Q5: How much does waterproofing remediation cost?

A: Costs vary with size, system type, and finishes:

• Small balconies/bathrooms: $10k–$50k+.

• Podium or roof membranes: $200k–$1m+.

• Basement injection/lining systems: $100k–$500k+.

We always provide itemised, transparent scopes, backed by engineer or manufacturer certification.

Q7: What warranties are provided?

A: Waterproofing is only as good as its certification. We provide:

• Manufacturer system warranties (10–20+ years depending on system).

• Workmanship warranties on installation.

• Defects liability periods as standard.

• DBP compliance packs including test results, ITPs, and photographic records.

This ensures owners and strata managers have a defensible record for future protection.

Q2: What are the signs of failed waterproofing?

A: Clear indicators include:

• Water ingress into apartments, basements, or car parks.

• Efflorescence (white salts) on walls or slabs.

• Peeling paint, mould, or damp smells in internal areas.

• Ponding or bubbling membranes on rooftops or podiums.

Tile cracking or grout failure on balconies and wet areas.These are not cosmetic issues — they’re warning signs of systemic membrane failure.

Q4: How long will waterproofing repairs take?

A: Timelines depend on location and access:

• Balconies or bathrooms: 1–4 weeks per area.

• Podiums or rooftops: 2–6 months depending on scale.

• Basements & car parks: staged programs over several months.

We plan sequencing to minimise downtime for residents while ensuring full curing and compliance.

Q6: What is the impact on residents and tenants?

A: Waterproofing remediation can be disruptive — we manage it with care:
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• Restricted use of balconies, bathrooms, or rooftops during works.

• Noise and dust from demolition and substrate prep.

• Temporary relocation in cases of wet area rebuilds.

Atomic Projects uses staged handovers, clear communication, and strict safety measures to keep disruption minimal.

Q8: Who should I contact for waterproofing remediation in Sydney?

A: Contact Atomic Projects — Sydney’s remedial waterproofing specialists.

We diagnose leak paths, rebuild substrates, and install engineered, certifiable systems that protect buildings long-term.

📞 Call us: 0410 515 509 | ✉️ hello@atomicprojects.com.au

Ph: 0410 515 509hello@atomicprojects.com.au11A Tangarra St EastCroydon Park NSW 2133Contact Us
Core Services
Facade RemediationConcrete & Structural RepairsWaterproofing RemediationBrickwork & Render RepairsBalcony RemediationCladding ReplacementRoof Repairs & ReplacementBuilding Investigations
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