Membrane & Coating Systems for Exposed and Below-Ground Structures
Floortek installs liquid-applied waterproofing membranes across South Australia. We waterproof concrete slabs, blockwork, CFC sheet substrates, and below-ground structures — car parks, rooftop decks, balconies, basements, lift pits, and podiums. System selection is driven by exposure class, traffic type, movement tolerance, and substrate condition — not by catalogue defaults.
We work with polyurethane coatings, two-part PU elastomers, and moisture-cure PU tanking systems. All installations are self-delivered with our own crew.
Waterproofing Systems
- 1-part PU coating — exposed pedestrian decks & balconies
- 2-part PU elastomer — trafficable car parks & ramps
- Moisture-cure PU — below-ground tanking
- Liquid-applied rooftop membranes
- Cementitious waterproofing — wet areas
- MMA/PMMA membrane — rapid-cure for time-critical programmes
Applications
Car Parks & Ramps
2-part PU elastomer, trafficable to heavy vehicles. Chemical resistant to fuels, oils, and de-icing salts
AS 4654.1 Class III | >350% elongationRooftop Decks
Liquid-applied membranes, UV stable, thermally tolerant. Trafficable or pedestrian finish available
Vehicle or pedestrian trafficableBasements & Lift Pits
Moisture-cure PU tanking — root resistant, applied to green or damp concrete. No moisture barrier required
>550% elongation | Class III crack bridgingBalconies & Terraces
1-part PU coating for exposed residential and commercial balconies. BRANZ Class II rated. Applied under tiles or as finished surface
320% elongation | UV resistantPodiums & Planter Boxes
High-elongation systems for complex podium geometry. Accommodates structural movement and thermal cycling
AS 4858 compliantStadiums & Public Infrastructure
2-part PU systems rated to AS 4858 Class III. High-pedestrian exposed areas, UV and thermally stable
Class III cyclic crack bridgingOur Process
Substrate Assessment
Concrete condition, crack mapping, moisture content, and drainage fall assessed before system selection. Existing membranes tested for compatibility or removed.
Surface Preparation
Diamond grinding, shot blasting, or scarifying to the specified CSP. The prepared surface is vacuumed and inspected — CSP achieved is documented and signed off before handover to the following trade. All cracks and penetrations are then detailed before membrane application begins.
Detail Coat
Reinforcing membrane applied to all junctions, upstands, drains, and penetrations before the field coat. Detailing is where most waterproofing fails — it gets full attention here.
Membrane Application
Full field coat applied to specified dry film thickness (DFT). Broadcast finish, aggregate, or protective overlay applied where trafficable finish is required.
Inspection & Handover
DFT testing and visual inspection prior to handover. System documentation provided: product data sheets, compliance certificates (AS 4654.1, AS 4858), and maintenance schedule.
Quote Your Waterproofing Project
Tell us the structure, exposure class, and traffic type — we’ll specify the right system and quote it properly.
Get a QuoteFrequently Asked Questions
What waterproofing system do I need for a trafficable carpark deck?
Trafficable carpark decks require a flexible polyurethane elastomeric membrane rated for vehicle loading, or an MMA/PMMA trafficable membrane system where a fast return to service is required. The system must accommodate structural movement and provide AS 4654-compliant waterproofing. Anti-slip texture and line marking are integrated into the topcoat specification.
What Australian Standards does commercial waterproofing need to meet?
Floortek specifies and installs systems compliant with AS 4654.1-2012 (waterproofing membranes for external above-ground applications) and AS 4654.2 (design requirements). For wet areas and below-ground tanking, applicable standards depend on the application type. All Floortek waterproofing installations are documented to specification and carry a workmanship warranty.
What’s the difference between PU and MMA waterproofing membranes?
PU (polyurethane) membranes are the industry standard for most waterproofing applications — proven, cost-effective, and suitable for most construction programmes. MMA (methyl methacrylate) trafficable membrane systems cure in approximately 1 hour per coat, allowing a complete multi-coat system to be installed and handed back in a single day. MMA is specified where programme constraints make a multi-day PU installation impractical.
Can waterproofing be applied to blockwork and fibre cement sheet, not just concrete?
Yes. Floortek installs waterproofing systems over concrete slabs, masonry blockwork, and fibre cement (CFC) sheet — all common commercial substrates. The membrane system and detailing method is selected to suit the substrate. Primer selection is critical to achieving bond over non-concrete surfaces, and all substrate preparation and detailing is completed by Floortek as part of the installation.
How does Floortek verify a completed waterproofing membrane has no defects?
Floortek uses an electronic spark tester — also called a holiday tester or porosity detector — for post-installation integrity testing. The device delivers a stabilised DC voltage via a phosphor-bronze brush along the completed membrane surface. Any pinhole, void, or discontinuity causes the current to arc to the conductive concrete substrate, triggering an immediate alert so the defect can be located and repaired before handover. For large or high-risk installations, Floortek can also engage an independent specialist to conduct Electric Field Vector Mapping (ELD) — a non-destructive method that traces electrical current across a wetted membrane surface to precisely pinpoint breaches. ELD can be conducted at practical completion or as part of periodic maintenance inspections to identify the source of any post-completion leak.
Does Floortek provide quality assurance documentation on waterproofing projects?
Yes. Floortek maintains Inspection and Test Plans (ITPs) and QA records on all commercial waterproofing installations. Before application begins, calibrated instruments record ambient conditions, substrate surface temperature, and moisture content. During application, wet film thickness (WFT) is checked at each coat. Post-cure, dry film thickness (DFT) is confirmed using ultrasound testing. Holiday testing results are documented alongside application records and provided to the head contractor or superintendent as part of our quality management package.
