Interbloc+ is an enhanced version of Envirocon’s proven Interbloc precast wall system, combining its rapid, durable, and sustainable construction capability with a high-quality textured split-stone finish for an aesthetic retaining wall solution. Designed especially for mechanically stabilised earth (MSE) walls, Interbloc+ integrates the geogrid connection directly into the block during manufacturing, ensuring reliable structural performance while maintaining the speed and precision of the original interlocking system. The range includes multiple block types with textured faces—including standard, flat top, flat bottom, wedge, and cap units—providing flexibility for curved walls and varied wall heights. Customers can contact the Envirocon team for support with design, specification, and project requirements.

These guidelines outline best practice for lifting and moving Interbloc units, which use Reid certified lifting anchors and clutches designed for vertical lifting only. Anchors and clutches must be inspected for damage, wear, and correct certification, and only genuine Reid Klaws may be used to maintain safety and warranty compliance. Suitable lifting machinery includes forklifts, excavators, front-end loaders, and cranes, each requiring sufficient lifting capacity—at least one tonne for standard 1200 blocks and 1.5 tonnes for 1800 blocks. Certified chains with current test tags must be used, and chain angle must not exceed 60 degrees when lifting blocks with dual anchors. Operators must be competent and follow relevant safety regulations, ensuring no one stands beneath lifted blocks. Blocks must never be transported over uneven ground using the lifting anchor; instead, forks should be used to avoid excessive anchor loading.

The foundation is critical to the performance of any Interbloc structure, but because ground conditions vary widely, standardised designs are not feasible and site-specific engineering is always recommended. In general, the best option is a level, firm concrete foundation, which speeds installation and prevents long-term settlement. Compacted gravel foundations—300 to 600 millimetres thick using GAP65 or similar aggregate with a thin sand levelling layer—may be suitable for retaining walls and low-height bulk storage. The required foundation type also depends on the reinforcing method: blocks tied into the foundation must sit on concrete, while blocks tied together may use compacted gravel. Envirocon provides generic planning guidance only and does not undertake foundation design; a qualified structural engineer should always determine the exact requirements based on site conditions, structure size, and expected loads.

A mechanically stabilised earth (MSE) wall is a high-strength retaining wall system made from alternating layers of compacted backfill and soil reinforcement connected to a precast concrete block facing. Stability comes from friction and tension between the backfill and reinforcement, creating a flexible gravity structure capable of carrying heavy loads and accommodating significant settlement. In the Interbloc system, soil reinforcement is typically geosynthetic mesh, with a short length cast into the block and a longer length installed on site. MSE walls offer benefits such as capacity for extreme heights and loads, excellent seismic performance, wide foundation load distribution, efficient drainage, design versatility, and rapid, predictable construction. For MSE applications, Interbloc uses GEOMAT blocks, which include cast-in geosynthetic reinforcement, most commonly TENSAR RE580 due to its strength and durability for Envirocon structures.

Interbloc is a fast and efficient modular wall system, allowing trained installers to achieve up to 25 square metres per hour. Before installation, staff must complete essential health and safety steps, including reviewing this guidance, conducting job-specific safety assessments, and ensuring lifting equipment is compliant. Each project includes a colour-coded block layout plan in Envirocon’s Envirobuild software, and more complex builds may include engineered construction drawings that must be studied before work begins. Site preparation includes ensuring clear access for delivery and lifting equipment, confirming the foundation is level and clean, and checking the layout area can accommodate the design. Only basic tools are required—mainly a lifting klaw, pinch bar, crowbar, brush or blower, and string line. Installation begins on a clean, level concrete foundation, with a string line set as a guide, starting from a corner and maintaining a consistent spacing of 745 to 747 millimetres between interlocking grooves. Blocks must be placed level, flush, and correctly aligned, with adjustments made using hand tools. Each course should be brushed clean before adding the next layer, maintaining a running bond pattern and using shims where necessary to keep the wall level.