Project Eastwood NSW / basement leaking
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Basement Wall & Ceiling Waterproofing Solutions

(Professional Remedial Waterproofing for Enclosed, Hard-to-Access Areas)

Basement waterproofing

Case - study

Negative-Pressure Waterproofing System 2025

What it is:
A surface-applied internal membrane that resists negative water pressure pushing through the concrete. check details below

Cost from $455m2
Final pricing may vary depending on wall layout, access, and the type of brick construction.
6years warranty
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1
Applied directly to the affected wall
Basement side wall showing damp patches and efflorescence.
2
Multi-coat system (primer + waterproof slurry + flexible membrane)
Applied multi-layer negative-pressure membrane.
3
Bonds into the concrete substrate and blocks moisture movement
Result: 100% moisture block, surface ready for paint.
4
Ideal for basements, lift pits, retaining walls
Benefit:Stops water seepage without external excavation.
Seriouse case used waterproofed render wall applied as based wall treatment

As wall based, may require to apply a waterproofed render wall system (Cement Render + Effelock Additive).
This creates a high-strength waterproof barrier when the existing wall is too damaged or too damp for standard coatings. It ensures a stable, long-lasting finish and prevents the leak from returning.

Case - study

Crack Injection Repair system2025

What it is:
Pool Deck Crack Leak Repair North Narrabeen NSW

The owner noticed water leaking into the garage every time the pool was in use or after heavy rain. After inspection, we found a structural crack running through the concrete pool deck.
Cost from $725P/M
6years warranty
Result: The leak stopped immediately and has not returned.
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The homeowner contacted us after seeing water stains on the garage ceiling below the pool deck. The leak was getting worse, and they were worried about damage to the concrete and electrical fittings. The area could not be accessed from above without damaging the pool tiles and waterproofing.

  • Risk if Left Untreated:
    -
    Worsening structural deterioration
    - Long-term moisture damage to finishes
    - Mould growth and indoor air quality issues
    -Increased repair cost if delayed

Over time, natural movement in the concrete caused a crack to form in the pool deck slab. Once the crack opened, pool water and rainwater began flowing through it. Because this crack ran through the full thickness of the concrete, surface sealing alone was not enough to stop the leak.

We installed injection ports along the crack and injected an expanding waterproof resin under pressure. The resin filled and sealed the crack internally through the full depth of the slab. After curing, the ports were removed and the surface was made good.

✅ Final Result: Water leak stopped immediately with no need to remove pool tiles.

3. Case - study

Wall creak & Penetration 2025

What it is:
A surface-applied internal membrane that resists negative water pressure pushing through the concrete. check details below

Cost from $455m2
Final pricing may vary depending on wall layout, access, and the type of brick construction.
6years warranty
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Basement side wall showing damp patches and efflorescence.

  • Applied multi-layer negative-pressure membrane.
    Result: 100% moisture block, surface ready for paint.

Active water leak through vertical crack.

  • Resin injection performed to seal crack through full depth.
    Result: Leak stopped immediately.

Concrete ceiling with moisture blistering.

  • Applied internal crystalline waterproof coating.
    Result: Water migration stopped, ceiling reinstated.

Frequently Asked Questions

How a Cavity Wall Works
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A brick veneer wall has a gap (cavity) behind the bricks. This gap collects any rainwater that seeps through the bricks and then drains it out through:

  • Flashing (a waterproof layer)
  • Weep holes (small drainage openings)

When these parts fail or weren’t installed properly, moisture starts entering your home.

The Main Causes (Simple & Easy)
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Missing or Incorrect Flashing:

  • The flashing is what catches water inside the cavity and directs it out through the weep holes.
  • If no flashing was installed, water has nowhere to go and ends up leaking inside the wall.
Blocked Weep Holes
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Weep holes allow water to escape.When they become blocked by mortar, dirt, spider nests, paving or render, water becomes trapped and forces its way indoors. What customers usually notice:

  • Damp smell near skirting boards
  • Bulging paint
  • Efflorescence on bricks
Soil or Garden Beds Too High
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If soil, mulch, pavers or decking are built above the weep-hole height, water cannot escape naturally. Why this matters:

  • Water floods back into the cavity
  • Weep holes become completely useless
  • Continuous rising damp issues
Site research plan

Get a quote

Cost-Effective Solution
Recommended approach balancing quality and budget.

Water penetration or Structural issue

$250+GST 

RISK-FREE RESEARCH: Your site inspection fee is fully CREDITED BACK to you when the project contract is signed. 

Category A:
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In-depth site-investigation;

comparative quote for the defined scope.

Detailed Scope of Work

Alternative Solution: Suggestion for a viable alternative if applicable (e.g., phased repair vs. full replacement).

On-Site Session:
- Time Management Planning & Risk Mitigation
- Scheduling & Project Protection Review

Most Popular

Detailed Defect Report:

$750+GST

Analysis of issues and clear, expert solutions.

Category B
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Complex Assessment: Inspection of multiple units, common property, and complex strata defects.

Vertical Access Included:
Roofs and Balconies
requiring ladder access (up to 7M/two stories).

Concealed Spaces: Comprehensive review of Basements, Sub-floors, and confined areas.

Separate Quote: Provides an independent, comparative quote for the defined scope.

Clarity on Inspection & Report
FAQ
Service area: "Northern Sydney, the Inner West, and Greater Parramatta." more
1. What does Structural Access cover?
2. How do you perform leak and water testing?
3. When is a Structural Engineer required?
4. How quickly will I get my report?
5. Can I use this report for insurance claims?
6. Does the cost cover complex testing like jackhammering?
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Basement dampness
Ceiling creak & leak
Wall creak & Penetration