Waterproofing

Enviro BSL

Enviro BSL is fully welded VLDPE basement liner system, purpose-built for high-risk below-grade structures where access is limited and performance must last. Designed for long-life waterproofing in basements, tunnels and other underground assets, it forms a continuous, watertight barrier engineered to resist water pressure, movement and aggressive ground conditions.

Designed for whole-of-asset durability (100+ year design life)
Welded, pressure-verified watertight integrity with proprietary compartmentalised resin injection redundancy system.
Proven performance + Australian-made delivery and technical support

Technical Documents

Typical Detail Drawings

Case Studies

Features & Benefits

Brochures

Enviro BSL Brochure Download

Data Sheets

Basement and Tunnel Details

BSL-20_WP BG RET BSL – PILE WALL CONSTRUCTION JOIN SLAB Download

BSL-19_WP BG RET BSL – PILE TOP TERMINATION Download

BSL-18_WP BG RET BSL – HIGH PRESSURE PIPE PILE PENETRATION Download

BSL-17_WP BG RET BSL – PIPE PILE PENETRATION Download

BSL-16_WP BG RET BSL – WATERPROOFING TERMINATION STRIP Download

BSL-15_WP BG RET BSL – WATERPROOFING AT CONSTRUCTION JOINT Download

BSL-14_WP BG RET BSL – EPOXY TERMINATION Download

BSL-13_WP BG RET BSL – WALL CONSTRUCTION JOINT WITH ENVIRO HYDROTITE AND INJECTION HOSE Download

BSL-12_WP BG RET BSL – WALL CONSTRUCTION JOINT WITH ENVIRO HYDROTITE Download

BSL-11_WP BG RET BSL – FLOOR ASSEMBLY WITH WATERBAR Download

BSL-10_WP BG RET BSL – WALL ASSEMBLY WITH INJECTION SOCKET AND PROTECTION LAYER Download

BSL-09_WP BG RET BSL – WATERPROOFING COMPARTMENTS Download

BSL-08_WP BG RET BSL – SHEET PILE EPOXY TERMINATION Download

BSL-07_WP BG RET BSL – WALL ASSEMBLY WITH INJECTION SOCKET Download

BSL-06_WP BG RET BSL – TUNNEL WATERSTOP STEEL PILING WITH WATERPROOFING Download

BSL-05_WP BG RET BSL – PRESSURE TERMINATION Download

BSL-04_WP BG RET BSL – WALL FLASHING WITH WATERSTOP Download

BSL-03_WP BG RET BSL – WALL JOINT WITH WATERSTOP Download

BSL-02_WP BG RET BSL – EXPANSION JOINT WITH WATERSTOP Download

BSL-01_WP BG RET BSL – FLOOR WALL JUNCTION WITH WATERSTOP Download

Metro Station Box Lining

Case Study – Metro Station Box Lining (Compartmentalised System)

A major underground metro station box required a waterproofing solution capable of managing sustained groundwater pressure while allowing future maintainability. Given the scale and complexity of the structure, the design incorporated a fully compartmentalised waterproofing approach to localise risk and provide long-term remediation capability.

BSL VLDPE Tunnel Lining Membrane was installed between the primary shotcrete lining and the secondary in-situ concrete wall, forming a continuous waterproofing barrier. The membrane was heat welded to create secure, watertight seams and detailed carefully around penetrations, kicker joints, and construction interfaces.

To enhance long-term asset protection, the system was compartmentalised into defined zones using welded waterstops and separation strips. Each compartment was integrated with injection ports and hose link systems, strategically positioned along construction joints and critical interfaces. This design allows targeted resin injection should water ingress occur, enabling remediation within a specific zone without affecting the broader structure.

By combining a high-performance VLDPE lining membrane with active injection capability, the project achieved both primary waterproofing integrity and a secondary, serviceable risk-management solution, ensuring durability, maintainability, and operational reliability in a critical transport environment.

Waterproofing: Below Ground – Basements, Tunnels

Features

• 100-year design life for long-term reliability
• High chemical resistance and suitable for
aggressive groundwater
• Excellent elongation for movement
accommodation
• Fully weldable (hot air welding, extrusion
welding)for system integrity
• Durable and puncture resistant
• Fire rated
• Australian Made
• Complies with extensive international test
standards including EN 527, EN 1928, EN
14151, EN 12691 and more (Ref: TDS Page 1–4 )