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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.

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Internal Wet Area Class 3 Bathroom
Live $ Room Rates
Structural Fix Negative Pressure Seal
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High Exposure Class 4 Balcony
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Residential Balconies & External Decks (AS 4654)

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TRB WATERPROOFER AS 3740, 4654
VERIFIED Creak & structural 

Internal Wet Areas (AS 3740 Compliance)

VERIFIED Creak & structural 

TRB WATERPROOFER AS 3740, 4654

Service Area & Location Welby st Eastwood 2122
Internal Wet Areas (AS 3740 Compliance)
Residential Balconies & External Decks (AS 4654)
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$1,120 Total
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Internal Wet Areas (AS 3740)

AS 3740 Internal Wet Area Waterproofing System (Bathroom/Ensuite)

Complete Class III polyurethane membrane application includingbond breaker tape to wall-floor junctions, hob angles, puddle flange seals, and two full coats.

Wet Area Size: 15 Sqm
$55.00/Sqm +GST $825 Total
Balconies & Decks (AS 4654)

AS 4654 Residential Balcony & External Deck Waterproofing

UV-stable exterior membrane system complying with AS 4654 requirements, including drainage screed falls, flashing terminations, and protection boards.

Balcony Area: 20 Sqm
$75.00/Sqm +GST $1,500 Total
Balconies & Decks (AS 4654)

Class 2 Strata Remedial Balcony Waterproofing Injection & Overlay

Specialised tile-over or breathable membrane overlay for leaking strata unit balconies without full tile removal, including perimeter flashings.

Remedial Area: 25 Sqm
$95.00/Sqm +GST $2,375 Total
Balconies & Decks (AS 4654)

Planter Box & Retaining Wall Waterproofing System

Root-resistant heavy-duty torch-on or liquid membrane with geocomposite drainage cell backing, filter fabric, and weep-hole detailing.

Wall/Planter Area: 30 Sqm
$85.00/Sqm +GST $2,550 Total
Subsurface & Injection

Below-Ground Basement Negative / Positive Waterproofing Tanking

Crystalline capillary waterproofing and multi-coat cementitious tanking for subterranean concrete walls and lift pits experiencing hydrostatic pressure.

Tanking Area: 40 Sqm
$110.00/Sqm +GST $4,400 Total
Subsurface & Injection

Polyurethane Hydrophilic Resin Crack & Joint Injection

High-pressure packer injection of expanding polyurethane foam to permanently stop active water leaks through concrete cracks and construction joints.

Injection Length: 15 Linear Metre
$65.00/Linear Metre +GST $975 Total
Internal Wet Areas (AS 3740)

Shower Leak Remedial Leak Sealing & Grout Re-injection

Non-destructive shower leak repair including deep epoxy grout sealing, silicone replacement, hob sealing, and penetrative clear membrane coating.

Showers: 1 Item
$450.00/Item +GST $450 Total
Balconies & Decks (AS 4654)

Roof & Parapet Wall Flashing Liquid Membrane Detailing

Reinforced fleece polyester and elastomeric liquid flashing application around roof penetrations, parapet walls, and box gutters.

Flashing Run: 20 Linear Metre
$50.00/Linear Metre +GST $1,000 Total
Internal Wet Areas (AS 3740)

Waterproofing Compliance Certification & Inspection Report

Licensed builder and waterproofing practitioner inspection, photo documentation log, and statutory compliance certificate issuance for council/certifiers.

Certificates: 1 Item
$350.00/Item +GST $350 Total
Balconies & Decks (AS 4654)

Electronic Leak Detection (ELD) / High-Voltage Integrity Testing

Non-destructive high-voltage vector mapping and impedance testing to pinpoint pinholes and breaches in newly installed waterproofing membranes.

Testing Area: 50 Sqm
$28.00/Sqm +GST $1,400 Total
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BUNDLE & SAVINGS
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OUR BEST OFFER

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Bathroom Waterproofing Membrane
FULL WET AREA #01
ID: #TRB-WP101
MOST POPULAR TRADE PACKAGE | NEW BUILD SPECIAL

2 Bathrooms & Concrete Balcony Package

Complete liquid waterproofing membrane for 2 full bathrooms, shower recesses, laundry, powder room, and 1 concrete balcony.

FULL HOUSE WET AREA PACKAGE $3,200.00 Standard Rate $2,720.00 (Full Scope)
SAVE 15% +GST
Included Scope: Full membrane application + 6-Year Warranty Certificate.
Exclusions: Major surface grinding, screeding & old tile removal.
*Site inspection required prior to application. Standard T&Cs apply.
Torch On Roofing Membrane
TORCH-ON ROOF #02
ID: #TRB-WP102
COMMERCIAL & RESIDENTIAL | HEAVY DUTY

Torch-On Concrete Roof Membrane

Dual-layer bitumen torch-on membrane protection designed for flat concrete roofs, decks, and exposed structural slabs up to 80m².

80m² FLAT ROOF PACKAGE $6,400.00 Standard Rate $5,440.00 ($68.00/m²)
SAVE 15% +GST
Included Scope: Primer, dual-layer torch-on application & detail sealing.
Exclusions: Structural slab repair & substrate moisture drying.
*Site inspection required. Standard T&Cs apply.
SAVE 15% BUNDLE
Remedial Leak Waterproofing Injection
REMEDIAL BUNDLE #03
ID: #TRB-WP103
HIGH DEMAND REPAIR | LEAK STOPPER

Remedial Basement & Subfloor Bundle

High-pressure resin injection leak sealing, negative side membrane treatment, and joint sealing for active underground water ingress.

COMPLETE REMEDIAL BUNDLE $4,800.00 Standard Rate $4,080.00 (Full Bundle)
SAVE 15% +GST
Included Scope: Crack injection, negative hydrostatic barrier & joint seal.
Exclusions: Structural underpinning & external excavation.
*Site inspection required. Standard T&Cs apply.

*This offer is currently available through our email marketing. Promotional rates exclude difficult site access or non-standard materials and are subject to final inspection.

VERIFIED COSTS & LOCATIONS
RECENT WORK
REAL PRICING

RECENT JOBS & PROJECTS

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

6 YEAR WARRANTY GUARANTEE

Check out our recent waterproofing projects across Sydney! We keep your bathrooms, balconies, and roofs dry and safe for years to come.

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Certified Work
Certified Waterproofing

Recent Jobs Done

Bathroom Waterproofing

Full Bathroom Membrane Seal

Complete leak protection for floor and shower walls with 6-year warranty certificate included.

Popular Price $1,850 Safe and clean work! 🛁
Eastwood
Balcony Repair

External Balcony Seal & Tile Over

Stopped balcony leaks into lower rooms using heavy duty outdoor liquid membrane.

Popular Price $3,200 No more outdoor leaks! ☀️
Epping
Shower Leak Repair

Ensuite Shower & Wall Base Seal

Sealed shower floor and wall joints without removing good tiles. Clean and fast job.

Popular Price $1,250 Quick 1-day turn around! 💧
Ryde
Rooftop Protection

Flat Roof UV Waterproof Coating

Applied tough solar-reflective membrane on concrete roof deck. Fully sun and water resistant.

Popular Price $4,800 Guaranteed for 6 full years! 🛡️
Parramatta
Laundry Floor Seal

Laundry Room Under-Tile Membrane

Protected laundry floor and drain edges against heavy water overflows and dampness.

Popular Price $1,400 Keep your laundry dry! 🧺
Baulkham Hills
Planter & Wall Waterproofing

Retaining Wall Underground Barrier

Coated back wall with flexible rubber bitumous membrane to block soil moisture and damp.

Popular Price $2,450 Heavy duty soil protection! 🌿
Strathfield
Commercial Amenities

Multi-Cubicle Floor & Wall Seal

Upgraded commercial washroom floor seal with full council compliance and 6-year certificate.

Popular Price $5,200 Certified & compliant! ✨
Auburn
Basement Waterproofing

Internal Basement Wall Crack Seal

Injected waterproof resin into concrete wall cracks to stop rising damp and basement water seepage.

Popular Price $2,900 Dry basement guaranteed! 🏡
Chatswood
Case Study Project Image
FEATURED PROJECT #01
ID: #TRB-CS1
REMEDIAL SERVICES | STRUCTURAL REPAIR

Structural Remediation & Waterproofing Package

Comprehensive structural repair and waterproofing solution designed to eliminate water ingress and restore full structural integrity.

FRIENDLY SCOPE OF WORK (STANDARD PACKAGE)
  • Demolition: Removal and disposal of affected structural elements and damaged substrates.
  • Preparation: Surface grinding, high-pressure washing, and concrete substrate preparation.
  • Application: Full installation of multi-layer waterproof membrane and concrete treatment.
  • Site Cleanup: Thorough site washdown, waste cartage, and final quality inspection.
FULL REMEDIAL PACKAGE COST $5,000.00 (Standard) $4,250.00 (Fixed Scope)
SAVE 15% SPECIAL +GST INCLUDED AT CHECKOUT
Important Terms: Includes full site setup and fixed structural scope. Excludes: Major unforeseen structural steel beam replacements or major underpinning. *Site boundary line verification required. T&Cs apply.
Case Study Project Image
SECURITY SPEC #02
ID: #TRB-CS2
SPECIALIST TRADE | BUILDING REPAIR

Balcony Remediation & Tiling Package

Complete balcony waterproofing overhaul including membrane re-application, polymer patching, and durable external tiling.

FRIENDLY SCOPE OF WORK (FULL REPAIR PACKAGE)
  • Substrate Prep: Strip existing tiles and inspect substrate for concrete spalling.
  • Membrane: Dual-layer Class III flexible polyurethane waterproofing application.
  • Tiling: Laying of slip-resistant external tiles with flexible joint sealants.
  • Handrail & Edge: Inspection, sealing, and repainting of perimeter handrail fixings.
FULL REMEDIAL PACKAGE COST $4,570.00 (Standard) $3,890.00 (Fixed Scope)
SAVE 15% SPECIAL +GST INCLUDED AT CHECKOUT
Important Terms: Includes full membrane seal, tile supply, and waste disposal. Excludes: Full structural slab replacement. *Site inspection required prior to sign-off. T&Cs apply.
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The Remedial Builders P/L

LIC: Builder 283896C • ABN 34 160 847 736

Mobilisation $550.00
01 Select Waterproofing Bundle
A. Core Waterproofing Packages
MOST POPULAR

Shower Shield (3-Stage)

Standard Shower: Strip-out + Class 3 Membrane + 24H Flood Test.

$3,850.00 /Pkg (+GST)
FULL SEAL

Complete Bathroom Seal

Full Floor + Wall-to-Ceiling Waterstop + Bond Breaker System.

$6,200.00 /Pkg (+GST)
02 Select Service Packages (Standard 10m²)
Waterproofing System & Specification
Waterproofing System & Specification Rate / Cost Select / Qty
Internal Liquid Membrane (Class 3)
High-flex elastomeric coating. Includes bond-breakers and corner reinforcement. 		$1,150.00
External UV-Stable System
Balcony/Deck protection. UV resistant and compatible with external adhesive. 		$1,850.00
Epoxy/Poly Injection (Leak Fix)
Structural crack injection to stop active water ingress from behind walls. 		$2,400.00
03 Verification & Certification Bundle
24H Flood Test + AS3740 Compliance Cert + 6-Year Warranty Pack
Mandatory statutory compliance package, rigorous flood testing & insured waterproofing warranty.
$650.00
04 Client & Site Details

AS3740 Waterproofing Specialist Standards

Licensed builder supervision, certified Class 3 membranes, and mandatory 24-hour flood testing protocols.

1. Surface Preparation Rigorous strip-out, substrate priming, and polyurethane bond-breaker installation.
2. Membrane Application Multi-stage liquid applied Class 3 membranes with full flange and corner detailing.
3. Certification & Warranty Issued with compliance certification, flood test verification, and 6-year warranty.
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Frequently asked questions

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

CERTIFIED WATERPROOFING COMPLIANCE

Waterproofing AS 3740 & Class III (10 Key Answers)

Internal wet areas, balcony membranes, Class III high-extensibility systems, and certified Australian Standards compliance.

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01 AS 3740 STANDARDS

Are your waterproofing installations compliant with AS 3740 and AS 4654?

Yes. All work strictly complies with AS 3740 (Internal Wet Areas) and AS 4654 (External Above-Ground Waterproofing) standards.

02 CLASS III MEMBRANES

What is a Class III high-extensibility waterproofing membrane?

Class III polyurethane membranes expand over 300% without tearing, bridging structural building movement to prevent leaks.

03 BALCONY LEAKS

How do you fix leaking balconies without ripping up all the tiles?

We evaluate sub-tile drainage, hydrostatic pressure, and offer complete re-sheeting or deep liquid injection membrane sealing options.

04 COMPLIANCE CERTIFICATE

Will I receive an official Waterproofing Certificate of Compliance?

Yes. Every completed job receives a licensed Waterproofing Compliance Certificate for occupation certificates and strata records.

05 SUBFLOOR PREP

Why is subfloor priming and screeding essential before waterproofing?

Proper screed falls toward floor wastes prevent ponding water, ensuring the liquid membrane cures smoothly with 100% adhesion.

06 BOND BREAKERS

How do you treat wall-to-floor junctions and drainage outlets?

We install flexible polyurethane bond breaker bandages and reinforced mesh around all corners, puddle flanges, and penetrations.

07 CURING TIME

How long must the liquid membrane dry before tiling can begin?

Membranes require 24 to 48 hours to fully cure, depending on humidity and ventilation, before flood testing or tiling.

08 FLOOD TESTING

Do you perform flood testing after applying the waterproofing membrane?

Yes. We plug floor drains and perform 24-hour water ponding tests on critical areas to verify zero moisture penetration.

09 WARRANTY

What warranty covers certified waterproofing applications?

All certified waterproofing works are backed by a full 6 to 10-year statutory warranty under Australian building regulations.

10 NEXT STEP

Need certified waterproofing?

Contact Us Now for site leak inspections, wet area assessments, and fixed-price membrane quotes.

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epoxy coating, professional wash, and paint services.
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Flooring Installation

Laminate, Hybrid SPC & Vinyl Plank Flooring
📍 NSW Inner West
📞 0433 379 576
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