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CLASS 3/4 COMPLIANT
NEGATIVE PRESSURE SEAL
PVC SHEET MEMBRANE
MEMBRANE LIVE

Seal Forever. Live Rates.

Specialist liquid and PVC sheet membrane applications. From Class 3 internal wet areas to Class 4 external balconies and planter boxes. Compare live 2026 bidding for certified protection.

WATERPROOFING QUOTE
Internal Wet Area Class 3 Bathroom
Live $ Room Rates
Structural Fix Negative Pressure Seal
Bidding Open
High Exposure Class 4 Balcony
Direct Engage

Structural repairs, creak and protect coats

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The Remedial Builders P/L
VERIFIED Remedial Builder

Waterproofing Balcony, Roof, Wall, Basement

VERIFIED Remedial Builder

The Remedial Builders P/L

Service Area & Location Eastwood 2122
Waterproofing & Tile work | concrete cancer
Cement render, Paint, Concrete, Retaining wall, Fence
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$1,120 Total
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Balcony & Podium

Complete Balcony Waterproofing & Tile Removal System

Strip existing tiles, grind screed, apply class-III polyurethane torch-applied or liquid membrane, flood test, and re-screed to fall.

Balcony Area: 25 Sqm
Basement & Retaining Wall

Negative Pressure Basement Waterproofing Tanking

Crystalline active capillary waterproofing slurry applied to subterranean concrete walls to arrest rising damp and hydrostatic water ingress.

Wall Area: 40 Sqm
Structural Crack Repair

Deep-Chase Polyurethane Epoxy Crack Injection

Low-viscosity structural epoxy and expanding polyurethane pressure injection for sealing leaking and structurally compromised concrete cracks.

Crack Length: 15 Linear Metre
Balcony & Podium

Roof Membrane Liquid Applied Reinforcement System

Seamless elastomeric UV-stable polyurethane liquid roofing membrane reinforced with polyester matting for flat and skillion roof decks.

Roof Area: 50 Sqm
Structural Repair

Concrete Spalling Remediation & Polymer Patching

Chipping back unsound concrete, treating corroded reinforcing steel with zinc-rich primer, and rebuilding with high-build structural repair mortar.

Patch Area: 10 Sqm
Basement & Retaining Wall

Retaining Wall Drainage & Waterproof Tanking Membrane

Heavy-duty bitument/polyurethane membrane application with protective drainage cell board and slotted agricultural pipe installation.

Wall Span: 30 Sqm
Structural Repair

Façade Wall Anti-Carbonation Protective Coating

Breathable elastomeric acrylic anti-carbonation coating protecting exterior concrete and rendered brick facades from CO2 and moisture ingress.

Façade Area: 80 Sqm
Balcony & Podium

Balcony Expansion Joint Sealing & Flashing Replacement

Saw-cutting, clearing failed silicone, installing compressible backer rod, and applying premium polyurethane architectural joint sealant.

Joint Run: 20 Linear Metre
Basement & Retaining Wall

Sub-Floor Drainage Sump Pump & Channel System

Supply and installation of polyethylene sump pit, submersible automatic pump with non-return valve, internal ag lines, and electrical connection.

Sump System Units: 1 Item
Structural Repair

Structural Carbon Fibre Plate & Wrap Strengthening

High-tensile carbon fibre reinforced polymer (CFRP) strip and fabric application with structural epoxy saturant for slab and beam load reinforcement.

Wrap Length: 10 Linear Metre
Selected Items 0 Items
Est. Subtotal (+GST) $0
BUNDLE & SAVINGS
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Colorbond Metal Roofing
METAL #01
ID: #TRB-ROOF1
STEEL | COLORBOND

Colorbond Metal Roof

Premium Australian steel re-roofing and insulation system.

150m² LIVE PACKAGE $22,941.18 ($152.94/m²) $19,500.00 ($130.00/m²)
SAVE 15% +GST
Scope: Sheet supply & fit.
Excl: Structural battens.
*T&Cs apply.
Roof Tile Restoration
TILES #02
ID: #TRB-ROOF2
RESTORATION | TILES

Tile Roof Restoration

Pressure clean, re-pointing, ridge capping & heat coating.

150m² LIVE PACKAGE $11,470.59 ($76.47/m²) $9,750.00 ($65.00/m²)
SAVE 15% +GST
Scope: Pointing & membrane.
Excl: Major tile replacement.
*T&Cs apply.
SAVE 15% BUNDLE
Flat Roof
COMMERCIAL #03
ID: #TRB-ROOF3
COMMERCIAL | FLAT ROOF

COMMERCIAL Flat Roof

Premium Australian steel re-roofing and insulation system.

150m² LIVE PACKAGE $25,588.24 ($170.59/m²) $21,750.00 ($145.00/m²)
SAVE 15% +GST
Scope: Sheet supply & fit.
Excl: Timber / Steel structural .
*T&Cs apply.
VERIFIED COSTS & LOCATIONS
RECENT WORK
REAL PRICING

RECENT JOBS & PROJECTS

2 featured major projects and 5 recent builds with costs, locations, and reviews.

100% WATERPROOF & STRUCTURAL GUARANTEE

Looking for professional balcony waterproofing, tile leak repairs, or heavy-duty decorative concrete driveways? Check out our certified remedial & conceting projects across Sydney & NSW! Built leak-free, perfectly sloped, and engineered to last.

5.0 Star Rated (210+ Reviews)
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Balcony Waterproofing & Concrete Driveways

Recent Jobs Done

Balcony Waterproofing & Re-tiling
Balcony Remedial

Complete Balcony Membrane & Re-Tiling

Stripped failed tiles, applied dual-layer polyurethane waterproof membrane with perimeter bond breakers, screeded to falls, and laid anti-slip outdoor porcelain tiles.

David L.

“No more water leaks in the room underneath! Professional testing before re-tiling gave us complete peace of mind.”

Exposed Aggregate Concrete Driveway
Decorative Concrete

Exposed Aggregate Concrete Driveway

Excavated, reinforced with heavy SL82 steel mesh, poured 32MPa custom aggregate concrete mix, surface-etched, and sealed with UV-resistant acrylic gloss.

Sarah & Mark

“Transformed our home front completely! The stone exposure is perfectly even and looks premium.”

Strata Balcony Waterproofing Repair
Strata Waterproofing

Commercial Balcony Efflorescence & Seal

Remediated efflorescence staining, regrouted with flexible epoxy grout, replaced joint sealants with polyurethane polyurethane mastic, and deep sealed.

Jason K. (Strata Manager)

“Prompt report and remediation on multi-unit balconies. Solved complex water ingress fast.”

Coloured Stencil Concrete Driveway
Driveway Replacement

Coloured Stencil & Broom Finish Driveway

Demolished cracked old asphalt, poured thick N32 concrete with integrated slate grey colour hardener, decorative border header, and expansion joint cuts.

Peter R.

“Replaced our crumbling old driveway in just 3 days. Clean cuts, smooth finish, super heavy-duty.”

Concrete Spalling & Waterproof

Cantilever Balcony Slab Repair & Membrane

Treated rusted internal steel rebar, rebuilt structural edges with polymer patch mortar, integrated drip groove tray, and applied elastic waterproofing coat.

Michelle B.

“Fixed the concrete spalling underneath and made the top completely water tight. Top class job!”

The Remedial Builders Balcony Waterproofing
MOST POPULAR #01
ID: #TRB-WP-CS1
THE REMEDIAL BUILDERS | BALCONY WATERPROOFING

Complete Balcony Waterproofing & Membrane Restoration

Protect your property from stubborn leaks and structural concrete spalling! We strip back damaged screed, apply high-performance dual-layer waterproofing membranes, and restore full sub-floor drainage.

SCOPE OF WORK
  • Substrate Prep: Removal of old tiles, damaged screed & surface grinding.
  • Fillet Sealing: Perimeter joint sealing & polyurethane bond breaker installation.
  • Dual Membrane: Heavy-duty class III elastic polyurethane membrane coats.
  • Flood Testing: 24-hour water ponding test & full compliance certificate.
INDICATIVE PROJECT COST $24,100.00 (Standard) $22,000.00 (Fixed Scope)
15% PACKAGE DISCOUNT
FREE SITE MEASURE & QUOTE
CONTACT NOW
Important Terms: Covers complete sub-floor membrane application and screed re-pitching up to 25m². Excludes: Architectural perimeter glass balustrade replacement or structural beam repairs. *T&Cs apply.
The Remedial Builders Basement Waterproofing
COMMERCIAL SPEC #02
ID: #TRB-WP-CS2
THE REMEDIAL BUILDERS | BASEMENT WATERPROOFING

Sub-Ground Basement Tanking & Negative Side Injection

Stop groundwater ingress permanently! We inject high-grade liquid elastomeric membranes and apply structural negative-side cementitious coatings to keep sub-ground walls dry and damp-free.

SCOPE OF WORK
  • Wall Prep: High-pressure wash, salt neutralizer & efflorescence treatment.
  • Deep Injection: Polyurethane crack injection for active water seepage points.
  • Liquid Tanking: Multicoat SEMCO liquid membrane & negative side barrier.
  • Drainage Check: Sub-soil drainage line review & perimeter channel check.
INDICATIVE PROJECT COST $17,000.00 (Standard) $14,500.00 (Fixed Scope)
15% PACKAGE DISCOUNT
FREE SITE MEASURE & QUOTE
CONTACT NOW
Important Terms: Covers interior basement wall tanking up to 60m². Excludes: Sump pump electrical installation or exterior excavation work. *T&Cs apply.
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4.7 / 5 Stars (500+ Jobs Done 💛)
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Licensed & Ready 283896C ✨
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The Remedial Builders P/L

LIC: Builder 283896C • ABN 34 160 847 736

Mobilisation $550.00
01 Select Core Remedial Package (Save 15%)
A. Structural & Waterproofing Bundles
SAVE 15%

Concrete Cancer & Spalling

Breakout, rebar treatment & structural mortar.

$161.50 /m² (+GST) $190
SAVE 15%

Balcony Waterproofing

Multi-layer polyurethane membrane & testing.

$85.00 /m² (+GST) $100
SAVE 15%

Structural Epoxy Crack Injection

High-pressure epoxy resin bonding.

$93.50 /lm (+GST) $110
SAVE 15%

External Wall Crack Stitching

Helical bar reinforcement & grout bonding.

$76.50 /lm (+GST) $90
02 Additional Repair & Protective Services
Service Task & Specification
Service Task & Specification Promo Rate Area / Qty
Polyurethane Water Leak Injection (Basements & Retaining Walls)
High-pressure PU foam injection to stop active water ingress through joints and porous concrete.
$110.50
SAVE 15%
External Wall Control Joint Sealing & Silicone Replacement
Removal of degraded sealant, backing rod installation and high-grade polyurethane joint sealant.
$38.25
SAVE 15%
Anti-Carbonation Protective Facade Coating
Breathable elastomeric membrane coating preventing CO2 ingress and future concrete spalling.
$29.75
SAVE 10%
Access scaffold tower
Aluminumn mobile tower at max 10m height in single tower (2 weeks rate).
$2,750
SAVE 10%
Material + Site setup allowance
Min 5-rate each project cover; Projecting, Site clean...
$700
SAVE 10%
03 Professional Guarantee & Compliance
Licensed Builder Structural & Waterproofing Compliance
Structural engineering compliance checks, defect reports & $20M Public Liability Insurance.
Included
04 Client & Site Details
Notice & Safety

You contract directly with the trade business (Build-Surety is not a party). Plus, never share ID or payments online—we will never ask.

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Frequently asked questions

Clear, honest answers for builders, strata, and property owners.

BALCONY WATERPROOFING

Balcony Waterproofing (10 Key Answers)

Simple answers to leaking balconies, cracked tiles, and keeping your outdoor areas completely watertight.

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01 LEAK CAUSES

Why do balconies leak into the rooms downstairs?

Failed membranes, cracked grout, or poor drainage allow water to seep through the subfloor into ceilings below.

02 TILE TRACTS

Do I always have to rip up all my balcony tiles?

Not always. Minor leaks can be treated with clear waterproof sealants, but severe structural leaks require tile removal.

03 POOLING WATER

How does pooling rainwater destroy balcony edges?

Standing water breaks down tile grout, rots fascia timbers, and causes concrete cancer along structural edges.

04 MEMBRANES

What waterproofing membrane system do you install?

We apply Class III high-flexibility polyurethane membranes engineered for extreme Australian weather exposure.

05 DRAINAGE FALLS

How do you fix incorrect drainage slopes on balconies?

We re-screed the concrete subfloor to create positive drainage falls towards main waste outlets before tiling.

06 BALUSTRADES

Do handrails and posts need to be removed during repairs?

Handrail fixings are core-drilled or base-plated and sealed with specialized flashings to prevent post-hole leaks.

07 STRATA APPROVALS

Do balcony waterproofing repairs require Strata permission?

Yes. Balconies are common property. We supply full DBP Act documentation and compliance packs for your strata board.

08 PROJECT DURATION

How many days does a complete balcony repair take?

Full strip-and-seal jobs take 3 to 7 days to allow proper membrane curing and flood testing between stages.

09 WARRANTY

What warranty covers balcony waterproofing works?

All complete balcony remediation projects carry a full 6-year statutory warranty and membrane certificate.

10 NEXT STEP

Ready to fix your leaking balcony?

Contact Us Now for a friendly site inspection, leak assessment, and fixed-price quote.

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Waterproofing / Tilers specialist for swimming pool
Score: 4.7 / 5.0
ABN 34160847736 • Lic 283896C
WHO WE ARE Friendly Local Experts
Welcome to The Remedial Builders P/L. We are Australia's trusted, specialists in Class-II: structural repairs, waterproofing, and building restoration. Driven by engineering excellence and modern techniques, we protect and restore your property's value, delivering durable solutions with complete transparency, reliability, and precision on every project across the nation.
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