Repair Systems — 01
Reinforcing fabric and mesh — waterproofing
Technical product reference for reinforcing fabric and mesh used in balcony and terrace waterproofing remediation. Covers woven polyester fabric, non-woven polyester fabric, fibreglass mesh, and self-adhesive bandage tape — mandatory junction reinforcement locations, membrane system compatibility, installation method, and brand comparisons for Australian Class 2 strata building applications.
What are reinforcing fabric and mesh — waterproofing?
Reinforcing fabric and mesh are materials embedded into the wet waterproofing membrane at junctions, corners, changes of plane, cracks, and around penetrations during membrane application. Their function is to build membrane thickness and continuity at locations where the substrate geometry creates stress concentrations — internal and external corners, wall-to-floor junctions, construction joints, and pipe and drain penetrations. At these locations, a single coat of liquid-applied membrane is insufficient without reinforcement — the fabric or mesh carries the membrane across the junction and prevents cracking, splitting, and delamination under the thermal movement and substrate deflection that all external balcony and terrace slabs experience.
In liquid-applied membrane systems, the reinforcing fabric is embedded between coats — a first coat of membrane is applied to the junction, the fabric is pressed into the wet membrane so it is fully saturated from below, and a second coat is applied over the top to fully encapsulate the fabric. The result is a reinforced membrane layer at the junction that is significantly thicker and more crack-resistant than the field membrane alone. Reinforcing fabric used in this way is a mandatory component of all compliant liquid-applied membrane systems on external balconies — it is not optional and its omission is a common cause of membrane failure at junctions.
Different fabric types — woven polyester, non-woven polyester, fibreglass mesh, and self-adhesive bandage tape — suit different membrane systems and junction types. The correct fabric type must be specified to match the membrane system being applied. Each membrane manufacturer specifies which reinforcing fabric is approved for use in their system.
Product Reference
5 products — 2 brands — woven polyester, fibreglass mesh, non-woven polyester, and self-adhesive bandage — mandatory junction reinforcement for liquid-applied membrane systems on external balconies and terraces
ARDEX Deckweb
Woven polyester reinforcement cloth — ARDEX liquid-applied membrane systems
Woven polyester reinforcement cloth — 190mm wide — embedded at all junctions, corners, coves, and penetrations in ARDEX liquid-applied membrane systems — mandatory at all internal and external angles and changes of plane
System Description
ARDEX Deckweb is ARDEX Australia's woven polyester reinforcement cloth, used as mandatory junction reinforcement in ARDEX liquid-applied membrane systems on balconies, terraces, and wet areas. It is specified at all internal and external corners, wall-to-floor junctions, cove details, construction joints, cracks, and around all penetrations — wherever the substrate geometry creates a stress concentration that could cause the liquid membrane to crack or split without reinforcement. The 190mm width is the ARDEX-specified width for junction reinforcement — confirmed in ARDEX Technical Bulletin TB006 and ARDEX system specifications. At a typical wall-to-floor junction, the Deckweb is centred on the junction and extends minimum 100mm onto the floor and minimum 90mm up the wall. The fabric is embedded between the first and second coats of ARDEX liquid membrane, pressed into the wet first coat until the fabric is fully saturated, then overcoated with the second coat to fully encapsulate the fabric. ARDEX Deckweb is confirmed for use with ARDEX WPM 300 series, ARDEX WPM 7000, ARDEX WPM 7015, and other ARDEX liquid-applied membrane systems — confirm the current ARDEX system specification for the specific membrane being applied before specifying.
Technical Properties
- Woven polyester reinforcement cloth — compatible with ARDEX liquid-applied membrane systems
- 190mm wide — ARDEX-specified junction reinforcement width
- Embedded between first and second membrane coats — fully encapsulated
- Mandatory at all internal and external corners, wall-to-floor junctions, construction joints, cracks, and around all penetrations
- Available from ARDEX Australia and trade stockists
Limitations
- ARDEX membrane systems only — do not use ARDEX Deckweb as junction reinforcement in Mapei or other brand membrane systems without cross-brand compatibility confirmation
- Fabric must be fully saturated by the first coat before the second coat is applied — dry fabric edges or air pockets indicate incorrect installation
- 190mm width is the minimum ARDEX-specified width — do not cut narrower at junctions
- Confirm current product specification and width with ARDEX Australia before specifying
PROCUREMENT SOURCES
Confirm suitability with the current manufacturer TDS before specifying or applying.
Mapei Mapenet 150
Alkali-resistant fibreglass mesh — 150 g/m² — Mapei cementitious membrane systems
Alkali-resistant fibreglass reinforcing mesh — 150 g/m² — embedded in Mapei cementitious flexible membrane systems at junctions, corners, and penetrations — 1m wide roll, cut to required width — mandatory junction reinforcement
System Description
Mapei Mapenet 150 is an alkali-resistant fibreglass reinforcing mesh used as mandatory junction reinforcement in Mapei cementitious flexible membrane systems — including Mapelastic, Mapelastic Foundation, Mapelastic Smart, and Mapelastic AquaDefense. The mesh is embedded in the wet membrane coat at all internal and external corners, wall-to-floor junctions, construction joints, cracks, and around all penetrations, reinforcing the membrane layer at stress concentration points. Alkali-resistant fibreglass is specified for use with cementitious membrane systems because standard glass fibre degrades in the alkaline environment of cement-based products — Mapenet 150 is treated to resist alkali attack and maintain its reinforcing performance within the cured cementitious membrane layer. The 150 g/m² weight and 4×4.5mm mesh size are specified by Mapei to provide adequate reinforcement without preventing membrane penetration through the mesh apertures. Supplied in 1m wide, 50m long rolls — cut to the required width for the junction being reinforced. Embedded between membrane coats — first coat applied, mesh pressed into wet coat and allowed to saturate through, second coat applied to fully encapsulate. Confirm the current Mapei system specification for the specific membrane being applied before specifying.
Technical Properties
- Alkali-resistant fibreglass mesh — 150 g/m² ± 5% — 4×4.5mm mesh size
- Blue colour — confirms alkali-resistant treatment
- 1m wide × 50m long rolls — cut to required junction width
- Embedded between membrane coats — fully encapsulated in the cured cementitious membrane
- Compatible with Mapei cementitious flexible membrane systems — Mapelastic, Mapelastic Foundation, Mapelastic Smart, Mapelastic AquaDefense
- Mandatory junction reinforcement at all angles, changes of plane, and penetrations
Limitations
- Mapei cementitious membrane systems — confirm compatibility with Mapei PU or hybrid liquid-applied membrane systems with Mapei technical before using Mapenet 150 in non-cementitious Mapei systems
- Do not use standard fibreglass mesh (non-alkali-resistant) with cementitious membrane systems — standard glass fibre will degrade in the alkaline environment
- Mesh must be fully saturated by the first membrane coat before the second coat is applied — confirm with Mapei technical if using with thicker-viscosity cementitious membranes
- Confirm current product specification, roll dimensions, and pricing with Mapei Australia before specifying
PROCUREMENT SOURCES
Confirm suitability with the current manufacturer TDS before specifying or applying.
Mapei Mapetex Sel
Non-woven polyester reinforcing fabric — Mapei membrane systems
Non-woven polyester reinforcing fabric — embedded in Mapei liquid-applied and cementitious membrane systems at junctions and corners — alternative to Mapenet 150 for specific Mapei membrane applications — confirm system specification before use
System Description
Mapei Mapetex Sel is a non-woven polyester reinforcing fabric used as junction reinforcement in specific Mapei waterproofing membrane systems. It is referenced alongside Mapenet 150 in Mapei system specifications — for example, Mapelastic Smart is specified with either Mapetex Sel or Mapenet 150 depending on the application detail and system being used. Non-woven polyester fabric provides a different reinforcement profile to fibreglass mesh — it absorbs membrane into its fibre structure rather than relying on mesh apertures for membrane penetration. Confirm with the current Mapei system specification and with Mapei technical which reinforcing fabric — Mapenet 150 or Mapetex Sel — is specified for the specific Mapei membrane being applied on the project before specifying. Do not substitute one fabric for the other without confirmation from Mapei technical.
Technical Properties
- Non-woven polyester reinforcing fabric
- Compatible with Mapei liquid-applied and cementitious membrane systems — confirm specific membrane with Mapei technical
- Used at junctions, corners, and around penetrations — embedded between membrane coats
- Referenced in Mapelastic Smart and other Mapei system specifications as an alternative to Mapenet 150 for specific applications
Limitations
- Confirm with Mapei Australia which reinforcing fabric (Mapenet 150 or Mapetex Sel) is specified for the specific membrane system being applied — do not assume they are interchangeable
- Confirm current product availability, roll dimensions, and specification with Mapei Australia before specifying
PROCUREMENT SOURCES
Confirm suitability with the current manufacturer TDS before specifying or applying.
ARDEX Deckweb — Self-Adhesive Bandage Tape Format
Self-adhesive woven polyester bandage tape — ARDEX membrane systems
Self-adhesive woven polyester bandage tape — pre-applied to substrate at junctions before membrane application — ARDEX membrane system compatible — speeds junction reinforcement on complex or repetitive junction details
System Description
In addition to the standard roll-form Deckweb embedded between membrane coats, ARDEX also produces self-adhesive bandage tape formats for junction reinforcement. Self-adhesive bandage tape is applied directly to the prepared substrate at the junction before membrane application begins — the tape adheres to the substrate and provides a pre-positioned reinforcing layer that the membrane is then applied over in a single continuous operation, rather than requiring the embed-between-coats method of standard fabric reinforcement. Self-adhesive junction tape formats are used where the junction geometry, project programme, or applicator preference makes pre-applied reinforcement more practical than the embed method. They are particularly useful on projects with a large number of repetitive junction details — threshold angles, column bases, drain surrounds — where the pre-application of tape before membrane application speeds the overall process. Confirm with ARDEX technical that the self-adhesive bandage tape format is an approved alternative to standard embedded Deckweb for the specific membrane system and junction type before specifying. Not all ARDEX membrane systems approve the self-adhesive pre-applied method as a substitute for embedded reinforcement at all junction types.
Technical Properties
- Self-adhesive woven polyester bandage tape — pre-applied to substrate before membrane application
- Compatible with ARDEX liquid-applied membrane systems — confirm specific membrane with ARDEX technical
- Applied directly to prepared substrate at junction — membrane applied over the top
- Speeds junction reinforcement on complex or repetitive details
- Available in various widths — confirm available widths with ARDEX Australia
Limitations
- Confirm with ARDEX technical that self-adhesive pre-applied format is an approved method for the specific membrane system and junction type — not universally interchangeable with embedded Deckweb
- Substrate must be clean, primed, and sound for the self-adhesive backing to bond correctly
- Confirm current product availability, widths, and pricing with ARDEX Australia before specifying
PROCUREMENT SOURCES
Confirm suitability with the current manufacturer TDS before specifying or applying.
Mapei Mapeband — Fabric Corner and Junction Tape
Rubber-coated polyester bandage tape — cove and drain formats — Mapei Mapelastic systems
Rubber-coated polyester junction and corner bandage tape — cove roll and drain flashing formats — compatible with Mapei Mapelastic membrane systems — pre-formed to suit standard junction geometries — speeds corner and drain detail application
System Description
Mapei Mapeband is a rubber-coated polyester fabric bandage tape available in cove roll and drain flashing formats, designed for fast application at standard junction details in Mapei Mapelastic waterproofing system applications. The cove roll format provides a pre-formed concave profile for wall-to-floor junctions, eliminating the need to form a cove fillet in mortar before membrane application. The drain flashing format provides a pre-cut circular or square flashing detail for drain surrounds and puddle flange perimeters. In balcony waterproofing remediation, Mapeband is used as a system-specific junction reinforcement accessory within Mapei Mapelastic system specifications. It is applied to the prepared substrate at junctions before membrane application and provides a combined cove and reinforcement function at the wall-to-floor detail. It is not a substitute for full Mapenet 150 or Mapetex Sel reinforcement at all junction types — confirm with the current Mapei system specification which junction details require Mapeband and which require embedded mesh reinforcement.
Technical Properties
- Rubber-coated polyester fabric bandage tape — cove roll and drain flashing formats
- Cove roll: pre-formed concave profile for wall-to-floor junctions — eliminates mortar cove fillet
- Drain flashing: pre-cut flashing detail for drain and puddle flange surrounds
- Compatible with Mapei Mapelastic system specifications
- Applied to prepared substrate before membrane application
Limitations
- Mapei Mapelastic system only — confirm compatibility with other Mapei membrane systems with Mapei technical before specifying
- Not a universal substitute for full Mapenet 150 or Mapetex Sel reinforcement at all junction types — confirm which junction details require Mapeband and which require embedded mesh
- Confirm current product availability, formats, and sizing with Mapei Australia before specifying
PROCUREMENT SOURCES
Confirm suitability with the current manufacturer TDS before specifying or applying.
Reinforcing fabric and mesh system comparison
Side-by-side comparison of reinforcing fabric and mesh systems. Confirm all product selections against the current manufacturer TDS and membrane system specification before specifying.
| Product | Brand | Material | Membrane system | Application method | Width / format | Key restriction |
|---|---|---|---|---|---|---|
| ARDEX Deckweb | ARDEX Australia | Woven polyester | ARDEX liquid-applied membrane systems | Embedded between first and second membrane coats | 190mm wide — roll | ARDEX systems only — do not substitute in Mapei systems without confirmation — minimum 190mm width — full saturation required before second coat |
| Mapei Mapenet 150 | Mapei Australia | Alkali-resistant fibreglass mesh — 150 g/m² | Mapei cementitious flexible membrane systems — Mapelastic, Mapelastic Foundation, Mapelastic Smart | Embedded between membrane coats | 1m wide roll — cut to required width | Alkali-resistant grade essential for cementitious systems — do not use standard fibreglass mesh — confirm whether Mapenet 150 or Mapetex Sel is specified for the specific membrane |
| Mapei Mapetex Sel | Mapei Australia | Non-woven polyester | Mapei liquid-applied and cementitious systems — confirm specific membrane | Embedded between membrane coats | Confirm roll dimensions with Mapei Australia | Confirm with Mapei technical which fabric is specified — not universally interchangeable with Mapenet 150 |
| ARDEX Deckweb — Self-Adhesive Bandage | ARDEX Australia | Self-adhesive woven polyester | ARDEX liquid-applied membrane systems | Pre-applied to substrate before membrane application | Various widths — confirm with ARDEX | Confirm with ARDEX technical that pre-applied format is approved for the specific membrane and junction type |
| Mapei Mapeband | Mapei Australia | Rubber-coated polyester — cove and drain formats | Mapei Mapelastic systems | Applied to substrate before membrane — pre-formed cove or drain profile | Cove roll and drain flashing pre-formed formats | Mapelastic system — confirm which junctions require Mapeband vs embedded Mapenet 150 or Mapetex Sel |
Junction reinforcement is mandatory — omitting it is a non-compliant membrane installation
AS 3740:2021 requires that liquid-applied waterproofing membranes be reinforced at all internal and external angles, changes of plane, and at pipe penetrations. Reinforcing fabric at junctions is not optional and not a matter of applicator preference — it is a compliance requirement. On external balcony remediation on Class 2 strata buildings, junction reinforcement omission is one of the most frequently identified defects in membrane failure investigations. If junction reinforcement is not installed, the membrane will crack at the junction under thermal movement regardless of how well the field membrane has been applied. Do not accept a membrane installation where junction reinforcement has been omitted.
Use only the reinforcing fabric specified for the membrane system being applied
Each membrane manufacturer specifies which reinforcing fabric is approved for use in their system. ARDEX specifies ARDEX Deckweb (woven polyester) for ARDEX liquid-applied systems. Mapei specifies Mapenet 150 (alkali-resistant fibreglass) or Mapetex Sel (non-woven polyester) for Mapei cementitious and liquid-applied systems respectively. Using the wrong fabric type — for example, standard fibreglass mesh in a cementitious system, or a non-approved fabric in an ARDEX system — can result in fabric degradation, delamination, or inadequate reinforcement at the junction. Always confirm the specified reinforcing fabric with the membrane manufacturer's current system specification before ordering.
Do not confuse reinforcing fabric with the membrane — the fabric does not replace the membrane coat
Reinforcing fabric embedded in liquid-applied membrane is not waterproofing. The membrane coats above and below the fabric are the waterproofing layer — the fabric reinforces the membrane at stress concentration points. Full membrane dry film thickness must still be achieved above the fabric layer at junction details. An applicator who applies only one coat of membrane over embedded fabric at a junction — on the assumption that the fabric itself provides waterproofing — has produced a non-compliant, undersized membrane at the most critical location in the system.
Reinforcing fabric must be fully saturated before the second coat is applied
When embedding reinforcing fabric between membrane coats, the fabric must be fully wetted through from below before the second coat is applied over it. Dry fabric, air pockets under the fabric, or incompletely saturated edges indicate that the first membrane coat was insufficient to wet the fabric before the second coat was applied. Applying the second coat over incompletely saturated fabric traps dry fabric within the membrane layer — this creates a plane of weakness at the junction that will allow the membrane to crack and split along the fabric edge under thermal movement. Press the fabric firmly into the wet first coat and verify full saturation before overcoating.
Disclaimer
This page provides general technical information only. Final product selection must be confirmed against the current manufacturer technical data sheet, membrane system specification, junction type, substrate condition, AS 3740:2021 requirements, and NCC requirements. Junction reinforcement with compatible reinforcing fabric is mandatory at all internal and external angles, changes of plane, and pipe penetrations in liquid-applied membrane systems — its omission is a non-compliant installation. Do not rely on this reference as a substitute for professional waterproofing consultant advice.