Concrete pool shells require mechanical scarification or high-pressure water blasting to remove laitance and contaminants, followed by two coats of ARDEX WPM 300 (HydrEpoxy). This creates a heavy-duty moisture barrier that prevents negative hydrostatic pressure and efflorescence from rising through the concrete substrate.

• Substrate Preparation: Mechanical grinding/blasting ensures a clean, sound, open-pored surface.
• Moisture Barrier: Apply two coats of water-based epoxy ARDEX WPM 300 to block ground moisture.
• Hydrostatic Defense: Prevents negative-side water vapor from debonding the tile system.

ARDEX WPM 002 is a fast-drying, two-component, fiber-reinforced elastomeric membrane specifically engineered for continuous water immersion, such as swimming pools. It creates a flexible, seamless undertile barrier that will not re-emulsify or degrade when submerged long-term in treated water.

• Immersion-Rated: Formulated specifically for permanent underwater performance under tiles.
• Fiber-Reinforced: Built-in microfibers increase tensile strength and eliminate separate reinforcing mesh.
• Non-Re-emulsifying: Advanced acrylic-polymer technology resists continuous water pressure.

Internal corners and wall-to-floor junctions are waterproofed using ARDEX STB Tape (Sealing Tape Band). Installed after priming, this self-adhesive butyl tape features a fleece face that absorbs structural movement and acts as a flexible bond breaker prior to encapsulating it with ARDEX WPM 002.

• Movement Control: Serves as a flexible bond breaker across high-stress change-of-direction joints.
• Self-Adhesive Butyl: Adheres firmly to primed substrates with a minimum 50mm overlap at joiners.
• Fleece Face Keying: Polypropylene fleece allows liquid ARDEX WPM 002 to lock directly onto the band.

Epoxy grout (such as ARDEX EG 15 or ARDEX WA) is mandatory because standard cement-based grouts erode rapidly when exposed to chlorine, salt sanitizers, and acid dosing. Epoxy grout forms a 100% solid, non-porous chemical barrier that prevents chemically treated water from reaching the tile adhesive.

• Chlorine & Chemical Resistance: Protects joints against pool sanitizers, salt, and pH balancers.
• Zero Porosity: Prevents water migration behind tiles and stops algae penetration inside grout lines.
• High-Pressure Resistance: Resists degradation from automatic pool cleaners and pressure washing.

The complete system includes mechanical substrate preparation, two coats of ARDEX WPM 300 epoxy moisture barrier, ARDEX STB Tape across junctions and penetrations, two coats of ARDEX WPM 002 flexible membrane, polymer-modified tile adhesive, and chemical-resistant epoxy grout.

• Primary Vapor Barrier: 2 coats of ARDEX WPM 300 over raw concrete.
• Flexible Membrane & Detailing: ARDEX STB Tape at joints encapsulated by 2 coats of ARDEX WPM 002 (1.2mm total DFT).
• Tiling & Chemical Finish: Class C2S2 polymer-modified tile adhesive finished with ARDEX epoxy grout.

Allow 16 to 24 hours after applying ARDEX WPM 002 before installing tiles. Once tiling and epoxy grouting are complete, the entire pool system requires a minimum 7-day full cure at 23°C before flood testing or filling the pool with chlorinated water.

• Inter-Coat Drying: 1–4 hours between coats of WPM 300 and WPM 002.
• Tiling Window: 16–24 hours post-membrane application.
• Full Submersion Cure: 7 days minimum before initial water filling or pond testing.

Pipe penetrations and skimmer box flanges must be mechanically cleaned, primed, and sealed using a neutral-cure sealant. ARDEX STB Tape is molded tightly around the fitting using an ARDEX brass roller, then fully encapsulated under two coats of ARDEX WPM 002 membrane.

• Joint Preparation: Clean and seal perimeter gaps between PVC/steel penetrations and concrete.
• Tape Detailing: Wrap self-adhesive ARDEX STB Tape around pipe collars with 50mm overlaps.
• Membrane Overcoating: Apply ARDEX WPM 002 over the fleeced surface to complete the seal.

No, ARDEX WPM 002 must not be applied directly over damp or green concrete. High residual moisture or hydrostatic pressure must first be sealed using two coats of ARDEX WPM 300 (HydrEpoxy), which provides a dry, stable substrate for the elastomeric membrane to bond to.

• Damp Substrates: Require ARDEX WPM 300 to stop moisture vapor transmission from behind.
• Prevents Delamination: Stops water pressure from blistering or debonding the top membrane.
• System Integrity: Creates a two-part moisture and waterproofing barrier combination.

A concrete swimming pool requires a total Dry Film Thickness (DFT) of at least 1.2mm for the flexible membrane layer. This is achieved by applying two even coats of ARDEX WPM 002 over the cured ARDEX WPM 300 primer base.

• Application Rate: Apply approximately 0.6mm DFT per coat across pool floors and walls.
• Kit Yield: One 40kg kit of ARDEX WPM 002 covers approximately 16m² to 24m² (two coats).
• Consistency Check: Use a wet-film gauge during application to avoid under-gauge thin spots.

Standard cement grout absorbs water, allowing dissolved salts and chlorine to migrate into the adhesive layer and corrode the bond coat. Epoxy grout creates a completely impermeable, chemical-proof joint seal that locks out pool water and holds tiles firmly in place despite active water circulation.

• Impermeable Seal: Prevents chlorinated water from soaking behind tiles and breaking down adhesive.
• Acid & Alkali Resistance: Withstands frequent chemical balancing without cracking or chalking.
• Structural Longevity: Maintains rigid edge support for tiles under dynamic hydraulic loads.

Yes, planter boxes and green roofs require specialized root-resistant waterproofing. Standard membranes can be easily punctured by aggressive plant roots, causing severe structural leaks. Premium systems like ARDEX Root Repell™ are specifically engineered with built-in inhibitors to protect these high-risk garden areas.

• Root Penetration Risk: Standard membranes cannot withstand root pressure over time.
• Specialized Systems: Require membranes specifically designated for subterranean or garden use.

To prevent root damage, you must install a membrane that features a chemical or physical root barrier. ARDEX Root Repell™ utilizes a premium built-in root inhibitor called Preventol® B2, which actively repels roots away from the membrane before they can penetrate.

• Active Protection: Repels roots on contact rather than just acting as a physical wall.
• Long-Term Security: Ensures the watertight integrity of the membrane is never compromised.

No, a high-quality root-repelling membrane will not kill your plants. The ARDEX Root Repell™ system is chemically formulated to safely turn root growth away from the waterproof lining without harming the overall root system or affecting the health of your plants.

• Plant Safe: Uses localized repellents, not widespread systemic herbicides.
• Eco-Friendly: Ideal for sustainable green roofs and organic planter boxes.

The most reliable waterproofing for green roofs is a heat-welded sheet membrane with built-in root resistance. ARDEX Root Repell™ is a highly recommended 1.2mm thick, polypropylene-lined sheet membrane that is heat-welded at the seams, providing a consistent, impenetrable barrier.

• Consistent Thickness: Guaranteed 1.2mm thickness across the entire roof surface.
• Heat-Welded Seams: Eliminates weak points where roots typically force entry.

While traditional liquid membranes require bond breakers at junctions, advanced flexible sheet systems do not. ARDEX Root Repell™ provides exceptional flexibility and elongation, which completely eliminates the need to install fillets or bond breakers in planter box corners.

• Faster Installation: Skips the curing time needed for traditional bond breakers.
• High Flexibility: Naturally accommodates structural movement in 90-degree corners.

Yes, professional planter box waterproofing must comply with national building codes. ARDEX Root Repell™ is fully compliant with AS4654.1, the Australian Standard for external waterproofing materials, ensuring your project meets all regulatory and certifier requirements.

• Compliance Code: AS4654.1 (External above-ground non-exposed membranes).
• Certifier Approval: Guarantees materials have been strictly tested for structural use.

Sheet membranes provide a guaranteed, uniform thickness that liquid membranes cannot always achieve over rough surfaces. ARDEX Root Repell™ delivers a consistent 1.2mm barrier with heat-welded seams, offering superior defence against root pressure, tearing, bubbling, and soil chemicals.

• Guaranteed Coverage: No risk of the membrane being applied too thinly.
• Chemical Resistance: Highly resistant to aggressive fertilizers and soil acidity.

Premium sheet membranes like ARDEX Root Repell™ are installed by heat-welding the overlapping laps and seams together. This fuses the material into a continuous, heavy-duty waterproof lining that allows for quick installation and immediate backfilling.

• Heat Welding: Fuses the seams into one continuous watertight sheet.
• Quick Turnaround: No extended drying time between coats like liquid systems.

Yes, certain advanced root-resistant membranes integrate perfectly with exterior tiling. ARDEX Root Repell™ is highly versatile and fully compatible with selected ARDEX tiling systems and water-based liquid applied membranes for seamless transitions to tiled terraces.

• Seamless Transitions: Easily connect a soil-filled planter box to a tiled balcony.
• System Compatibility: Works perfectly with standard ARDEX adhesives.

ARDEX Root Repell™ is a permanently flexible WeldTec™ membrane designed specifically for any soil-facing structure. It is the ideal waterproofing solution for residential and commercial planter boxes, basement retaining walls, and expansive rooftop green gardens.

• Primary Uses: Planter boxes, green roofs, and retaining walls.
• Property Types: Suitable for both residential homes and large commercial strata buildings.

Waterproofing a standard Sydney bathroom costs between $900 and $1,500, or $50 to $100 per square metre for internal wet areas. Final pricing varies based on substrate preparation, shower configuration, membrane type, and compliance certification requirements under AS 3740.

• Ensuite / Small Bathroom: $600–$750
• Standard Bathroom: $800–$1,100
• Large Bathroom / Wet Room: $1,200–$3,000+

Yes, NSW building regulations require a licensed waterproofer to issue a Compliance Certificate upon completing residential wet area work. This certifies compliance with Australian Standards (AS 3740/4654) and is required by certifiers, insurers, and local councils before issuing an Occupation Certificate.

• Legal Requirement: Mandatory under NSW Fair Trading for works over statutory thresholds.
• Insurance Protection: Essential for home warranty insurance and valid property damage claims.

No, residential waterproofing in NSW must be completed by a licensed waterproofing contractor holding a valid NSW Fair Trading licence. Unlicensed DIY waterproofing violates building codes, voids property insurance, and prevents certifiers from issuing an Occupation Certificate.

• Licensing: Requires a NSW Trade Contractor Licence in Waterproofing.
• Risks: Uncertified work results in failed council inspections and denied insurance claims.

Most liquid-applied waterproofing membranes require 24 to 48 hours of total cure time before tiling or flood testing. Drying between individual coats takes 2 to 4 hours, though elevated Sydney humidity can extend full curing times.

• Between Coats: 2–4 hours drying time.
• Full Curing: 24–48 hours before screeding, tiling, or water testing.

Waterproofing in NSW is governed by two primary standards under the National Construction Code (NCC): AS 3740 for internal wet areas (bathrooms, laundries) and AS 4654 for external above-ground areas (balconies, rooftops).

• AS 3740-2021: Regulates internal shower vertical heights, floor gradient falls, and waste seals.
• AS 4654.2: Regulates UV exposure resistance, flashing details, and external drainage terminations.

Balcony waterproofing in Sydney typically costs between $1,200 and $3,000 for a standard residential balcony, averaging $80 to $150 per square metre. Complex remedial projects or structural membrane teardowns range from $3,000 to $10,000+.

• Small Balcony: $800–$1,100
• Standard Residential Terrace: $1,200–$2,000
• Remedial Balcony Repair: $3,000–$10,000+

Minor surface leaks caused by degraded grout can be treated temporarily using epoxy sealants or penetrating barriers. However, if the underlying waterproof membrane is torn or missing, full tile removal and membrane replacement under AS 3740 is required.

• Sealer / Grout Repair: Temporary surface barrier (1–2 year typical life).
• Full Membrane Replacement: Permanent solution involving tile removal, re-sheeting, and membrane re-application.

Common signs of waterproofing failure include peeling or bubbling paint on adjacent walls, swollen timber door frames, tile grout cracking, persistent damp odours, and white mineral deposits (efflorescence) along balcony edges or shower bases.

• Internal Indicators: Blistering paint on walls backing onto showers, mould in skirting boards.
• External Indicators: Water staining on lower-level ceilings or salt crusts leaking from balcony soffits.

A professionally installed waterproofing membrane compliant with Australian Standards lasts between 15 and 25+ years. Work completed by a licensed contractor includes statutory workmanship warranties, along with manufacturer material warranties ranging from 10 to 20 years.

• Workmanship Warranty: Mandated by NSW Fair Trading under licensed trade contracts.
• Material Warranty: 10–20 years depending on liquid polyurethane or sheet membrane selection.

A standard waterproofing flood test requires sealing floor wastes and filling the area with water to a depth of 20mm for a minimum of 24 hours. This step verifies membrane integrity before laying screed or floor tiles.

• Test Duration: 24-hour continuous water retention.
• Inspection Timing: Conducted post-membrane cure and prior to tiling.

Concrete roof slabs must be clean, structurally sound, and mechanically prepared to remove laitance. Apply two coats of ARDEX WPM 300 (HydrEpoxy) as a moisture barrier to prevent negative hydrostatic pressure and rising damp from blistering the top waterproofing membrane.

• Substrate Prep: Mechanical grinding or high-pressure washing removes dust, release agents, and laitance.
• Moisture Defense: ARDEX WPM 300 seals residual dampness in new or unsealed concrete slabs.
• Bonding Surface: Creates an ideal, non-porous keying coat for ARDEX WA 98 contact adhesive.

Use ARDEX WPM 715 for exposed, trafficable concrete roofs requiring direct UV resistance. Use ARDEX WPM 1000 for non-exposed concrete roofs that will receive a directly adhered tile finish, screed, or pedestal paving system.

• ARDEX WPM 715: 1.5mm UV-resistant, synthetic rubber sheet membrane designed for direct weather and foot traffic.
• ARDEX WPM 1000: Fleece-lined WeldTec sheet membrane engineered for high-strength tiling and screed adhesion.
• Shared Technology: Both feature 40mm heat-welded lap joints compliant with AS 4654.1.

ARDEX WA 98 is a heavy-duty, solvent-based contact adhesive designed specifically for bonding ARDEX WeldTec sheet membranes (WPM 715 and WPM 1000) to horizontal concrete slabs, vertical upturns, brickwork, and timber parapets.

• Application Method: Apply evenly by brush or roller to both the concrete substrate and the sheet underside.
• Open Time: Allow 15 to 60 minutes tack time depending on ambient temperature before joining.
• High Bond Strength: Delivers an instant, high-tack bond across structural transitions and vertical faces.

Corners require prefabricated ARDEX WeldTec corner accessories or specialized flashing tape. Apply ARDEX WA 98 contact adhesive to dress the membrane tightly into the 90-degree junction, followed by hot-air welding all overlaps using a hand nozzle and brass roller.

• No Fillet Required: The extreme flexibility of WeldTec membranes eliminates the need for concrete fillets or bond breakers.
• Pressure Rolling: Utilize an ARDEX brass roller to eliminate air pockets in tight corner geometry.
• Welded Seams: Hot-air weld all 40mm corner overlaps for permanent watertight integrity.

Under AS 4654.2, vertical membrane upturns must extend a minimum of 40mm to 180mm above the finished roof surface, depending on the building’s wind class. For solid parapet walls, turn the membrane up the wall, over the top, and down the exterior edge.

• Wind Class Standard: Minimum 40mm in low wind zones (N1), increasing for higher exposure.
• Full Adhesion: Bond the upturn continuously using ARDEX WA 98 adhesive to eliminate sagging.
• Parapet Wrapping: Complete coverage over parapet tops prevents moisture ingress from masonry caps.

Secure the top edge of the upturned membrane using an aluminium pressure-seal termination bar mechanically fastened to the structure. Apply a continuous bead of ARDEX CA 20 P sealant along the top channel to lock out wind-driven rain.

• Mechanical Fixing: Anchor the aluminium bar at maximum 200mm centers into the concrete wall.
• Sealant Bead: Apply silane-modified polymer ARDEX CA 20 P into the upper capping reglet.
• AS 4654.2 Compliance: Ensures the membrane edge cannot peel, sag, or allow water behind the system.

Cut the ARDEX sheet membrane tightly around penetrations and wrap the pipe collar using pre-formed WeldTec sleeves. Bond the sleeve to the pipe using ARDEX CA 20 P sealant and heat-weld the membrane flange to the main roof sheet.

• Pipe Prep: Clean and abrade PVC or metal pipes before applying ARDEX CA 20 P adhesive sealant.
• Flashing Detailing: Heat-weld a 40mm flange surrounding all roof drains, scuppers, and plumbing pipes.
• Flexible Seal: Maintains an elastomeric seal under thermal expansion and dynamic roof movement.

Seams and laps are joined using an approved automatic or manual hot-air welding tool. Overlap adjacent sheets by a minimum of 40mm and fuse the thermoplastic layers together, creating a seamless, homogeneous bond stronger than the sheet itself.

• Minimum Overlap: Maintain 40mm side and end laps across all roof sheets.
• Hot-Air Fusion: Weld at controlled temperatures without naked flames or solvent glues.
• Quality Check: Probe all welded seams with a blunt seam tester to verify complete thermal fusion.

Yes, ARDEX WPM 1000 features a polypropylene fleece surface designed specifically for direct bonding of polymer-modified tile adhesives (e.g., ARDEX X 18) or bonded screeds mixed with ARDEX WPM 405 slurry, just 1 hour post-installation.

• Rapid Turnaround: Commence screeding or tiling 1 hour after completing sheet installation.
• Direct Adhesion: Micro-fleece backing anchors directly into Class C2 tile adhesives.
• Protection Layer: Eliminates wait times and protects the underlying waterproof core during construction.

ARDEX CA 20 P is a single-component, silane-modified polymer (SMP) sealant with exceptional UV, weather, and vibration resistance. It adheres aggressively to wet or dry concrete, metals, and waterproofing membranes without shrinking, cracking, or degrading under direct sunlight.

• Zero Shrinkage: 100% solids formulation maintains full volume in expansion joints and flashing beads.
• UV & Weather Resistance: Engineered for long-term exposure on flat concrete rooftops.
• Multi-Substrate Bond: Bonds aluminium, stainless steel, cured membranes, and raw concrete.

Waterproofing PVC permanent formwork requires sealing interconnecting panel snaps, tie-cone holes, and slab-to-wall kickers. While PVC panels resist water, joint seams can allow moisture penetration, requiring external tanking with ARDEX WPM 3000X or internal joint filling with ARDEX RA 050 hybrid polymer sealant.

• External Tanking: Apply self-adhesive ARDEX WPM 3000X sheet membrane over external PVC faces.
• Joint Sealing: Tool ARDEX RA 050 hybrid sealant into panel interconnecting seams and corners.
• Footing Detailing: Tool a 15x15mm ARDEX RA 050 fillet along the slab-to-wall kicker interface.

Negative-side waterproofing involves applying a hydrostatic pressure-resistant barrier coat to the interior face of a subterranean wall. It is used when external soil excavation is impossible, such as along boundary walls, zero-lot lines, or retrofitting existing leaky basements experiencing rising damp.

• Primary System: Utilizes two coats of heavy-duty water-based epoxy ARDEX WPM 300 (HydrEpoxy).
• Hydrostatic Pressure: Prevents water vapor and ground moisture from pushing through from behind.
• Substrate Suitability: Ideal for interior concrete slabs, masonry, blockwork, and prepared PVC walls.

ARDEX WPM 300 (HydrEpoxy 300) is applied in two coats to damp or green concrete to create a non-porous moisture barrier. Once cured, it blocks water vapor, prevents efflorescence, and stops negative hydrostatic pressure from causing internal dampness or wall finish failure.

• Application Rate: Apply two coats achieving a total coverage rate of 30m² per 20L kit (15m²/coat per kit).
• Damp Concrete Compatible: Can be applied directly over green, unprimed, or damp concrete substrates.
• Cure Time: Allow 4 hours drying time between coats and 7 days for a complete hydrostatic cure.

ARDEX WPM 3000X is a 1.5mm thick, cold-applied SBS self-adhesive sheet membrane engineered for positive-side (external) below-ground tanking. It self-seals on contact around minor installation punctures and provides a continuous barrier against acidic ground water and soil chemicals.

• No Open Flames: Cold-applied self-adhesive installation eliminates on-site torch hazards.
• Self-Sealing Core: Flexible SBS rubber modified bitumen seals against nail punctures and backfill pressure.
• Substrate Priming: Applied over concrete or masonry surfaces primed with ARDEX WPM 240 or ARDEX WPM 300.

ARDEX WPM 1500 is a 1.5mm fleece-lined WeldTec sheet membrane loose-laid against shoring walls or under slab blinding before pouring concrete. As wet poured concrete cures, its matrix mechanically locks into the membrane’s fleece face, eliminating water tracking behind the membrane.

• Blindside Tanking: Installed against soil retention systems (shotcrete, secant piles) prior to concrete pour.
• Mechanical Interlock: Synthetic fleece anchors permanently into the structural concrete slab or wall face.
• Heat-Welded Laps: Overlaps (50mm–100mm) are hot-air welded to form a continuous, seamless seal.

Basement floor-to-wall junctions are prepared by mechanically cleaning the cold joint, applying a continuous 15x15mm bead of ARDEX RA 050 hybrid polymer sealant as a coving fillet, and tooling it flat before encapsulating the junction under your primary liquid or sheet membrane.

• Damp Substrate Adhesion: Adheres firmly to green, unprimed, or damp concrete substrates without a primer.
• High Flexibility: Delivers 400% elongation at break to absorb dynamic structural floor-to-wall movement.
• Rapid Overcoating: Can be overcoated immediately by approved ARDEX liquid waterproofing membranes.

No, negative-side coatings cannot bond to smooth, glossy PVC formwork without surface preparation. You must abrade the PVC face using 40–60 grit sandpaper to create a mechanical key, apply ARDEX P 82 Ultraprime, and follow with two coats of ARDEX WPM 300.

• Mechanical Keying: Sand the PVC panel surface to achieve a CSP1 equivalent roughness profile.
• Specialized Primer: Apply ARDEX P 82 Ultraprime synthetic resin primer (allow 3 to 24 hours dry time).
• Negative Barrier: Apply two coats of ARDEX WPM 300 over the primed surface to seal joint lines.

When zero-lot line restrictions prevent external excavation behind basement walls, use a pre-applied blindside sheet (ARDEX WPM 1500 placed against the shoring wall) or an internal negative-side epoxy barrier (ARDEX WPM 300 over structural concrete) paired with internal sub-floor drainage channels.

• Pre-Applied Option: Install ARDEX WPM 1500 against shoring or piling prior to fixing rebar and pouring concrete.
• Post-Applied Option: Apply ARDEX WPM 300 internally directly to structural concrete or masonry walls.
• Drainage Integration: Combine internal negative seals with sub-floor perimeter ag-drains and sump pumps.

Form tie-cone holes and pipe penetrations must be cleaned of release agents, filled flush with non-shrink structural repair mortar, and detailed using ARDEX RA 050 hybrid polymer sealant before overcoating with a continuous liquid or self-adhesive tanking membrane.

• Tie-Cone Cavities: Fill solidly with non-shrink repair mortar and seal external faces with ARDEX RA 050.
• Pipe Collars: Tool a flexible, continuous bead of ARDEX RA 050 around metal or PVC penetrations.
• Membrane Overlap: Extend ARDEX WPM 3000X or WPM 300 a minimum of 100mm past all penetration collars.

External tanking membranes like ARDEX WPM 3000X must be protected prior to backfilling using high-density polyethylene dimple drainage sheets (e.g., ARDEX Geo-Drain) or rigid protection boards to prevent sharp backfill aggregate from puncturing the membrane.

• Protection Layer: Fix dimpled drainage sheet or protection board immediately post-membrane inspection.
• Hydrostatic Relief: Dimple boards channel ground water downward into perimeter sub-soil drainage lines.
• Mechanical Safety: Protects the membrane from tearing during backfilling, compaction, and site settling.