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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.

START WATERPROOFING QUOTE
Internal Wet Area Class 3 Bathroom
Live $ Room Rates
Structural Fix Negative Pressure Seal
Bidding Open
High Exposure Class 4 Balcony
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High-Performance Liquid Waterproofing Membranes

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TRB DBP CLASS - 2 Waterproofer
VERIFIED Waterproofer

Structural Joint Sealing Systems

VERIFIED Waterproofer

TRB DBP CLASS - 2 Waterproofer

Service Area & Location Eastwood 2122
Epping: Exterior concrete deck membrane
Baulkham Hills: Balcony waterproof sealing
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$1,120 Total
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24/7 Auto-Book & Strata

24/7 Strata Class 2 Emergency Leak Investigation & Thermal Scoping

Rapid diagnostic service including electronic moisture meter testing, thermal imaging camera scoping, and immediate mitigation report for strata managers.

Inspection Count: 1 Inspection
Strata CLASS - 2 Waterproofer

Class 2 Balcony Waterproofing Membrane Tear-Up & Replacement

Complete strip-out of failed tiles and waterproofing, screed re-fall correction, application of Class III compliant torch-on or liquid membrane system.

Balcony Area: 25 Sqm
Structural Joint Sealing Systems

Structural Expansion Joint Sealing & Elastomeric Waterstop

Routing, backing rod insertion, and high-movement polyurethane / silicone hybrid joint sealant injection for dynamic building movement joints.

Joint Length: 20 Linear Metre
High-Performance Liquid Membranes

High-Performance Liquid Waterproofing Membrane (Class III)

Multi-coat reinforced polyurethane liquid membrane applied to flat roofs, podium decks, and wet areas with 400% elongation elasticity.

Membrane Area: 50 Sqm
Basement & Subterranean

Below-Ground Basement Negative Pressure Tanking & Slurry

Crystalline and polymer-modified cementitious tanking slurry applied to retaining walls and basement slabs to withstand negative hydrostatic water pressure.

Tanking Area: 60 Sqm
Roof & Membrane Systems

Roof Membrane Torch-On Bituminous Two-Layer System

Heavy-duty APP/SBS modified torch-applied mineral cap sheet membrane with slate chip UV protection for commercial and strata flat roofs.

Roof Area: 80 Sqm
Basement & Joint Sealing

Polyurethane Injection Curtain Grouting for Retaining Walls

Advanced pressure injection of expansive hydrophobic polyurethane resins behind concrete block or diaphragm walls to seal subterranean water ingress.

Grouting Area: 30 Sqm
High-Performance Membranes

Remedial Box Gutter Waterproofing & Silicone Lining

Rust treatment, joint sealing, and heavy elastomeric liner installation inside commercial or strata roof box gutters to prevent internal overflows.

Gutter Length: 25 Linear Metre
Strata CLASS - 2 Waterproofer

Shower Hob & Recess Waterproofing Waterproof System

AS3740 compliant wet area waterproofing including floor wastes, hob angles, wall joints, and class-3 liquid membrane with bond breaker tape.

Bathroom Count: 1 Bathroom
Strata CLASS - 2 Waterproofer

Planter Box Waterproofing & Root-Barrier Protection System

Heavy-duty bitumen/polyurethane tanking with chemical root-inhibitor additive, protection board, and drainage cell installation for strata planters.

Planter Area: 20 Sqm
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Est. Subtotal (+GST) $0
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# Most Popular Choice
Liquid Waterproofing Application
LIQUID #01
ID: #TRB-WP-LQ01
LIQUID POLYURETHANE | SEAMLESS COATING

Liquid Membrane Waterproofing

Flexible liquid coating applied directly to prevent water leaks on flat surfaces.

120m² COMPLETE PACKAGE $12,000.00 ($100.00/m²) $10,200.00 ($85.00/m²)
SAVE 15% +GST
Scope of work: Surface cleaning, primer layer, and two coats of waterproof liquid.
Not included: Repairing cracked concrete under the surface.
*Standard conditions apply.
# Heavy-Duty Protection
Sheet Membrane Waterproofing Application
SHEET #02
ID: #TRB-WP-SH02
TORCH-ON SHEET | DOUBLE LAYER

Sheet Membrane Waterproofing

Strong rolled sheet layers welded together for extra thick water protection.

120m² COMPLETE PACKAGE $15,600.00 ($130.00/m²) $13,260.00 ($110.50/m²)
SAVE 15% +GST
Scope of work: Primer coat, heavy sheet layer, sealed edges, and corner details.
Not included: Removing old tiles or deep drainage work.
*Standard conditions apply.
VERIFIED COSTS & LOCATIONS
RECENT WORK
REAL PRICING

RECENT JOBS & PROJECTS

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

Friendly Local Services

Recent Jobs Done

Waterproofing Contractor

Balcony Waterproof Sealing & Membrane Repair

Applied dual-layer polyurethane waterproof membrane to leaking tiled balcony floor with reinforced corner flashing seals.

Waterproofing Contractor

Exterior Concrete Deck Liquid Membrane Coating

Prepped substrate surface, ground expansion joints, and coated large outdoor concrete deck with heavy-duty elastic waterproofing.

Waterproofing Contractor

Structural Wall Polyurethane Injection Sealing

High-pressure chemical resin injection into deep concrete basement wall cracks to stop rising damp and active water ingress.

Waterproofing Contractor

Retaining Wall Negative-Side Waterproofing

Sealed brick retaining wall with crystalline tanking slurry membrane to prevent moisture seepage into garden rooms.

Waterproofing Contractor

Rooftop Concrete Slab Sheet Membrane Seal

Torch-on bitumen sheet waterproofing membrane application across exposed flat concrete roof deck for weatherproofing.

Waterproofing Contractor

Planter Box Sheet Membrane & Drainage Cell

Lined brick garden planter box with root-resistant sheet membrane and installed subterranean drainage protection sheet.

Waterproofing Contractor

Commercial Basement Floor Epoxy Damp Seal

Coated underground carpark floor slab with moisture-barrier epoxy coating to prevent rising water vapour damage.

Waterproofing Contractor

Sub-Floor Concrete Slab Sealing & Joint Cure

Applied heavy-duty hydro-active sealer around internal plumbing floor penetrations and perimeter edge joints.

Strata Balcony Waterproofing
STRATA FAVORITE #01
ID: #TRB-WP-CS1
STRATA & RESIDENTIAL | BALCONY & WET AREA MEMBRANE

Strata Balcony & Tile-Over Waterproofing

Complete commercial-grade balcony waterproofing rejuvenation system. High-performance polyurethane membrane application over existing tiles or exposed concrete substrate across 80m² with full perimeter band sealing.

FULL SCOPE OF WORK (80m² TOTAL SCOPE)
  • Surface Prep: High-pressure wash, tile grinding, and joint cleanout across 80m².
  • Membrane System: 2x coats UV-stable elastic polyurethane membrane with fabric reinforcement.
  • Perimeter & Joints: Class III polyurethane sealant along wall junctions and expansion joints.
  • Certification: Full AS4654.2 waterproofing compliance certificate & 10-year warranty.
FULL WATERPROOFING PACKAGE COST $11,200.00 ($140.00/m²) $9,600.00 ($120.00/m²)
SAVE 15% SPECIAL +GST INCLUDED AT CHECKOUT
Important Terms: Includes high-grade UV membrane, joint sealants, labor, and warranty certificate. Excludes: Major structural concrete repairs or full balcony balustrade removal. *Site inspection required. T&Cs apply.
Commercial Basement & Roof Waterproofing DBP
CLASS 2 DBP REGISTERED #02
ID: #TRB-WP-CS2
COMMERCIAL & CLASS 2 STRATA | ROOF, BASEMENT & WALLS

Class 2 Roof, Wall & Basement Waterproofing

DBP-compliant structural waterproofing remediation for rooftop slabs, retaining basement walls, and negative-side groundwater leaks. Designed for multi-residential and commercial assets requiring declared designs.

FULL SCOPE OF WORK (250m² TOTAL SCOPE)
  • Basement Grout Injection: High-pressure polyurethane resin injection to stop active leaks.
  • Roof Sheet Membrane: 250m² torch-on dual layer bituminous / liquid sheet membrane system.
  • Retaining Wall Tanking: Crystalline slurry coating & drainage cell layer protection.
  • DBP Compliance: Works declared under the Design and Building Practitioners Act 2020.
FULL WATERPROOFING PACKAGE COST $36,250.00 ($145.00/m²) $31,250.00 ($125.00/m²)
SAVE 15% SPECIAL +GST INCLUDED AT CHECKOUT
Important Terms: Includes DBP Practitioner lodgement fees, leak injection, membrane systems, and labor. Excludes: Structural steel beam installation & deep site excavation. *Site inspection required. T&Cs apply.
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The Remedial Builders P/L

LIC: Builder 283896C • ABN 34 160 847 736

Mobilisation $550.00
01 Balcony Waterproofing Estimate Options (Save 15%)
A. Waterproofing System Bundles
SAVE 15%

Type A: Concrete Slab / Board

Surface prep, primer & polyurethane membrane.

$85.00 /m² (+GST) $100
SAVE 15%

Type B: Timber Board / Yellow Tongue

Board upgrade, structural bonding & membrane.

$135.00 /m² (+GST) $158.80
02 Project Compliance & Engineering
Compliance & Site Access Item Cost / Rate Selection
A - Class-2 Strata Project (DBP Act Design Practitioner Details Required)
Mandatory compliance consultation, lodgement and design practitioner coordination.
$950.00
MANDATORY
B - Scaffold & Access (Recommended protecting internal area) Level 2
External scaffolding setup, safety netting and protection for level 2 access.
$2,850.00
WEEKLY RATE
03 Demolition & Preparation Options
Demolition Task & Specification Rate Area / Qty
Full Tile Removal & Surface Prep Ready for Waterproofing
Complete tile lifting, adhesive grinding, and substrate cleaning.
$42.00
PER M²
Full Yellow Tongue Timber Board Removal & Replacement with New Concrete Board Upgrade
Demolition of rotten timber and installation of structural concrete sheet flooring.
$115.00
PER M²
04 Tiling & Screeding Options
Tiling Task & Specification Rate Area / Qty
300x300mm New Tile Screeding & Tile Finish (Installation cost only)
Sand-cement fall screeding and professional tile installation (labor only).
$95.00
PER M²
600x600mm New Tile Screeding & Tile Finish (Installation cost only)
Specify format preference for layout alignment and setting. Select 1 unit for 300x300mm or 600x600mm.
$120.00
FORMAT SPEC
05 Client & Site Details
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Frequently asked questions

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

WATERPROOFING & CLIENT COMMUNICATIONS

Waterproofing & Client Relations (10 Key Answers)

Professional answers regarding pre-contract terms, site access constraints, and how we professionally handle difficult words or site disputes.

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01 PRE-CONTRACT TERMS

What key details are clarified before signing a waterproofing contract?

We review total job scope, membrane specifications, fixed pricing, payment stages, and exact project timelines so everything is clear upfront.

02 SITE ACCESS

How do you handle restricted site access and busy common areas?

We coordinate access hours with owners and strata, lay protective floor coverings, and keep walkways clear and safe every day.

03 DISPUTE RESOLUTION

How do you handle unexpected site disputes or tough client feedback?

We respond calmly and professionally, listen directly to concerns, and refer to documented engineering plans to resolve issues fairly.

04 DAILY COMMUNICATION

How will I stay updated on daily site progress?

You receive concise, regular photo and message updates so you always know what stage of waterproofing or curing is underway.

05 MEMBRANE SELECTION

How do you select the correct waterproofing membrane system?

We choose Class III high-extensibility liquid or sheet membranes specifically rated for balconies, planters, rooftops, or wet areas.

06 MEMBRANE TESTING

How do you verify the waterproofing is 100% leak-free before tiling?

We perform mandatory flood testing or electronic leak detection to confirm a watertight seal prior to laying screed or tiles.

07 CHANGE ORDERS

What happens if hidden structural damage is discovered during works?

We stop, document the issue with photos, present clear repair options, and obtain written approval before doing any additional work.

08 WORKPLACE CONDUCT

What standards of conduct do your site tradespeople follow?

Our team adheres to strict noise controls, non-smoking policies on site, polite communication, and daily rubbish cleanup.

09 CERTIFICATION

Do you provide formal waterproofing compliance certificates?

Yes. Upon completion, we issue a formal Certificate of Compliance (AS 3740 / AS 4654) backed by statutory warranty guarantees.

10 NEXT STEP

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Contact Us Now for a clear pre-contract consultation, site review, and fixed-price quote.

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Expert structural brick and blockwork.

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Handyman TRB

Complete Property Repairs and Upkeep

Sam's Royal tile

A. Certified Subfloor and Wall Waterproofing

Fencing, Gate, Retaining wall TRB

Timber Fencing & Boundary Walls

Epoxy wash & paint TRB

epoxy coating, professional wash, and paint services.

Flooring Installation

Laminate, Hybrid SPC & Vinyl Plank Flooring
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TRB DBP CLASS - 2 Waterproofer

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