Commercial & Industrial Waterproofing Solutions NSW

Reliable commercial waterproofing contractors across NSW u2014 flat roofs, carparks, lift pits, podium decks, and civil structures, with full DBP Act compliance documentation.

Commercial Waterproofing: A Different Class of Work

Commercial and industrial waterproofing projects are categorically different from residential work in terms of scale, complexity, compliance obligations, and the consequences of failure. A leaking balcony in an apartment is a serious problem for one household. A leaking podium deck in a commercial building may affect dozens of tenants, render common areas unusable, and create significant liability for the building owner. A failing carpark deck coating may cause structural deterioration in a $50 million asset.

The Design and Building Practitioners Act 2020 (DBP Act) has significantly increased the compliance obligations on contractors carrying out waterproofing on class 2 buildings (multi-residential) in NSW. Licensed waterproofing contractors must now make formal declarations of compliance for waterproofing work on these buildings, backed by documentation that can withstand scrutiny from building owners, owners corporations, and the courts. Econyc’s documentation standards for commercial work are designed to meet these requirements fully.

For industrial and civil structures u2014 water treatment facilities, tunnels, retaining structures, and heavy infrastructure u2014 the performance requirements for waterproofing exceed residential standards, and the product specifications must reflect the specific exposure conditions, chemical environment, and service life requirements of the structure.

Our Commercial Waterproofing Services

Econyc delivers the full range of commercial and industrial waterproofing services across NSW:

Flat roof waterproofing u2014 liquid-applied polyurethane membrane systems (Tremco TREMproof, Sika Sikalastic) for commercial flat roofs. We assess the existing roof substrate, specify the correct membrane system for the exposure and drainage conditions, and apply with documented coverage rates and inspection records.
Carpark deck waterproofing u2014 trafficable polyurethane deck coatings for exposed carpark decks (top decks subject to direct sun and rain) and non-trafficable systems for internal carpark floors subject to spill and wash-down. Products include Sika Sikafloor and Tremco’s TREMproof deck coating range.
Lift pit waterproofing u2014 crystalline and cementitious negative-side systems (Sika WT-200 W, SikaTop 122 Plus) for lift pits in existing buildings, combined with PU injection (Normet TamPur) for active joint and crack failures. We carry confined space entry competencies and manage all required safety planning for lift pit access.
Podium deck waterproofing u2014 protection of structural slabs beneath landscaping, paving, and planting on commercial podium decks. Full assembly design including membrane, root barrier, drainage, and filter systems.
Below-grade civil waterproofing u2014 retaining walls, basements, tunnels, water retention structures, and underground plant rooms. Products selected to meet the specific hydrostatic pressure, chemical exposure, and service life requirements.
Remedial commercial waterproofing u2014 investigation, specification, and rectification of failed waterproofing in commercial buildings. Written condition reports, remediation programmes, and DBP Act-compliant documentation.

Our Commercial Project Process

Econyc’s commercial waterproofing projects follow a structured process designed to meet head contractor, owner, and regulatory requirements:

Condition assessment u2014 for remedial projects, a thorough site inspection with written report and photographic record. For new projects, a review of the project specification and drawings to confirm scope and product suitability.
Product specification u2014 a written specification documenting the waterproofing system selected, the basis of selection, the applicable Australian Standard, and the expected performance outcome. This specification forms part of our contract and is provided to the building owner or principal contractor.
Submission of product data sheets and safety data sheets u2014 all products to be used are submitted with full technical and safety documentation before work commences, in accordance with head contract requirements.
Site setup and traffic management u2014 for occupied commercial buildings, we develop a detailed traffic management plan and occupant notification schedule in consultation with the building manager.
Application u2014 carried out by our own licensed contractors. We do not subcontract waterproofing application. Coverage rates and application conditions are recorded as work proceeds.
Inspection and testing u2014 flood testing, moisture reading, or electronic leak detection depending on the system type. All test results are documented.
Completion documentation u2014 a full package including application records, product batch numbers, coverage rates, test results, and waterproofing compliance certificate. For class 2 buildings under the DBP Act, compliance declarations are prepared and lodged as required.

Products We Use u2014 Normet, Sika & Tremco

Econyc’s commercial waterproofing product specification draws on the full ranges from Normet, Sika, and Tremco u2014 three of the world’s leading construction waterproofing manufacturers with strong local Australian presence and technical support.

Normet provides our injection systems for active crack and joint repair in commercial structures. The Normet TamPur range covers polyurethane foam injection for active water ingress, and the Normet Vaeamat range covers cementitious grout injection for ground treatment and large void filling. Normet’s injection equipment u2014 including high-pressure packers, pumps, and monitors u2014 is maintained to manufacturer specification by our teams.

Sika provides our liquid membrane, crystalline, cementitious, and floor coating systems for commercial work. Key products include Sika Sikalastic-590 and Sika TREMproof for liquid membrane systems, Sika WT-200 W for crystalline below-grade waterproofing, and Sikafloor for trafficable carpark deck coatings. Sika’s commercial team provides technical support, approved applicator status, and extended product warranties for qualifying projects.

Tremco provides our sealant systems, below-grade membrane products, and roof waterproofing range. Key products include Tremco TREMproof 250GC (reinforced polyurethane membrane), Tremco Paraseal LG (below-grade bentonite membrane), Tremco Dymonic 100 (high-movement sealant), and Tremco Vulkem 350 (trafficable polyurethane sealant for expansion joints). Tremco is used on hospitals, schools, tunnels, and major commercial projects throughout Australia.

Warranty on Commercial Waterproofing

Econyc provides workmanship warranties on all commercial waterproofing work, scaled to the application type:

Roof waterproofing systems: 10-year workmanship warranty
Podium deck and balcony membrane systems: 10-year workmanship warranty
Carpark deck coatings: 7-year workmanship warranty
Below-grade and basement waterproofing: 7-year workmanship warranty
Civil and infrastructure waterproofing: 7-year workmanship warranty (project-specific conditions apply)

All commercial warranties are documented in writing with our NSW licence number, scope of work, product specifications, and contact details for warranty claims. Manufacturer warranties from Sika, Tremco, and Normet apply in addition to our workmanship warranty when products are installed by an approved applicator. Extended manufacturer warranties (up to 15 years for qualifying Sika and Tremco products) are available for large commercial projects that meet specific application criteria u2014 contact us to discuss eligibility.

Frequently Asked Questions u2014 Commercial Waterproofing NSW

What documentation do you provide for DBP Act compliance?
nFor waterproofing work on class 2 buildings (multi-residential) in NSW, we provide: a written scope of works, product data sheets and safety data sheets for all products used, application records documenting coverage rates and conditions, flood test or other test records, a waterproofing compliance certificate referencing the applicable Australian Standard, and a DBP Act compliance declaration where required by the project. All documentation is provided in digital format and is archived by Econyc for the duration of our records retention period.

Can you work around tenants and building occupants?
nYes. Commercial waterproofing in occupied buildings requires careful planning. We develop a traffic management and occupant impact plan for every occupied commercial project, provide advance notice to affected tenants or residents, and stage works to minimise the duration of any disruption. We have experience working in operating hospitals, hotels, schools, and occupied strata buildings.

Do you handle large-scale strata remediation programs?
nYes. We have managed multi-building strata remediation programs involving dozens of units and multiple building elements. We provide a programme of works, progress reporting, staged invoicing, and a single point of contact for the strata manager or owners corporation throughout the project.

What is electronic leak detection and when is it used?
nElectronic leak detection uses an electrical potential difference between the membrane and the substrate to identify breaches in the membrane that may not be visible to the naked eye. It is used on high-value waterproofing applications u2014 podium decks, planter boxes over occupied spaces, and green roofs u2014 where the cost of a post-construction leak remediation significantly exceeds the cost of the detection test. We can arrange electronic leak detection as part of our quality assurance on qualifying projects.

Can you provide a single waterproofing contractor for a large mixed-use development?
nYes. Econyc can act as the single waterproofing subcontractor for large mixed-use developments, covering all waterproofing elements across the project: basement, podium deck, balconies, bathrooms, and roof. Single-contractor waterproofing simplifies coordination, eliminates interface disputes between trades, and produces consistent documentation for the head contractor and building certifier.

Ready to Get Started?

Contact Econyc today for a free site inspection and fixed-price quote. Licensed, insured, and fully compliant with Australian waterproofing standards.