Certified Waterproofing Services for Wet Areas
Preventing costly structural moisture damage through multi-tier polyurethane membranes, reinforced bond-breakers, shower recess sealing, and hydrostatic flood testing.
Specialized Capabilities and Proven Craftsmanship
Every stage executed by trade-certified specialists adhering to Australian building standards.
Class III Polyurethane Membrane
High-extensibility liquid polyurethane curing into a flexible seamless waterproof skin.
Perimeter Bond-Breakers
12mm elastomeric bandage tapes accommodating normal building settlement without tearing.
Pond Leak Testing
24-hour hydrostatic flood testing of shower bases validating watertight integrity.
Balcony & Planter Barriers
UV-stabilized dual-sheet membranes engineered for exterior exposure and ponding water.
Precision Engineering and Architectural Detailing
Built with uncompromising structural integrity, premium materials, and obsessive attention to detail.
We eliminate trade shortcuts. Our project directors oversee every dimensional cut, substrate preparation, and finishing detail, guaranteeing that your space delivers luxury aesthetics and long-term durability.
Australian Standards and Code Compliance
Certified compliance across national construction codes and trade manufacturing benchmarks.
Statutory Builder Warranties
Covered by mandatory 6-year structural and 2-year non-structural statutory warranties backed by the Home Building Act and HBCF insurance.
Rigorous Tolerance Controls
All installations adhere to the NSW Guide to Standards and Tolerances, ensuring laser-straight junctions, plumb walls, and uniform joint gaps.
Master Builders Membership
Proud active members of the Master Builders Association, upholding the highest standards of professional conduct, safety, and trade ethics.
Our Streamlined Five-Stage Delivery Methodology
A seamless, disciplined construction journey keeping your project on time and within scope.
Substrate Preparation
Grinding, vacuuming, and priming concrete or timber substrates to ensure maximum adhesion.
Bond-Breaker Installation
Affixing continuous flexible bond-breaker tapes to all internal 90-degree floor-wall corners.
First Membrane Coat
Applying heavy-duty elastomeric polyurethane across floors and 150mm upstands.
Cross-Hatched Second Coat
Applying orthogonal second coat to achieve certified dry film thickness (DFT).
Hydrostatic Flood Test
Filling shower pans for 24 hours to prove zero water penetration before tiling commences.
Advanced Substrate Preparation and Execution
Guarding timber substructures and ceiling cavities against severe exterior weather events.
Exterior balconies and roof decks require specialized UV-resistant, root-resistant, and high-movement waterproofing membranes. We install certified drainage mats, drip edges, and multi-tier sheet membranes designed to endure harsh Australian climate extremes.
- AS 4654.2 External Waterproofing Membrane Standard Compliance
- Pressure Sealed Termination Bars & Counter-Flashing Upstands
- Puddle Flanges Integrated with Drainage Subfloor Outlets
- Full Warranty Documentation for Strata & Private Owners
Fast Track Council Approvals Management
Waterproofing in residential buildings is strictly regulated under NCC Volume Two and AS 3740. Every project completed by AR Developments Group receives a formal Certificate of Compliance (Form 15/16).
Frequently Asked Service Questions Answered
Clear, honest advice regarding project scheduling, approvals, and material warranties.
Why is waterproofing the most critical component of a wet area build?
Water damage is the leading residential construction defect in Australia. Even minor leaks rot structural subfloor joists, attract termites, and cause mold infestations, costing tens of thousands in repairs.
How many coats of membrane do you apply?
We apply a minimum of two heavy-duty cross-hatched coats of Class III elastomeric polyurethane, achieving a cured dry film thickness exceeding Australian Standard minimums.
What are bond-breakers and why are they mandatory?
Bond-breaker tapes and reinforced fillet angles allow the membrane to stretch across wall-to-floor junctions during normal building settlement without tearing or delaminating.
Do you issue a compliance certificate for council or certifiers?
Yes. We provide complete Form 15/16 compliance certificates and photographic documentation validating that every stage complied with AS 3740 and NCC specifications.
Complementary Building and Renovation Services
Enhance your property by pairing this service with our licensed residential construction offerings.
Luxury Bathroom Renovations
Complete turnkey design and tiling over certified waterproof barriers.
Custom Functional Laundry Renovations
Floor and wall upstand sealing preventing washing machine floods.
Structural Carpentry & Framing
Repair rot-damaged subfloor bearers before membrane application.
Duplex & Granny Flat Builds
Inter-floor acoustic and waterproofing barriers for duplexes.
Active Regional Coverage and Dispatch
Operating across key Australian metropolitan and regional territories with certified site supervisors.
New South Wales
Sydney Metro, Hills District, Parramatta, Wollongong & Central Coast.
Licensed NSW Building TeamQueensland
Greater Brisbane, Gold Coast, Moreton Bay & Sunshine Coast.
Certified QLD Building TeamAustralian Capital
Canberra Central, Belconnen, Gungahlin, Woden & Tuggeranong.
Accredited ACT Building TeamSouth Australia
Adelaide Metropolitan, Adelaide Hills, Norwood & Coastal Hubs.
Master SA Building TeamStart Your Next Building Consultation
Connect with our licensed building directors for an honest site assessment, engineering feasibility, and detailed scope of work.