EIFS repair systems

Mapei's EIFS repair system for facade remediation uses Silexcolor Coat as the polymer-modified base coat applied over the EPS insulation board, with AR glass mesh embedded into the fresh base coat to provide tensile reinforcement across the render face. The mesh distributes stress across the render area and prevents discrete crack formation at joints, corners, and around openings. For EIFS repair on Class 2 strata buildings, the system is specified where the base coat or finish render layer has cracked, debonded, or the AR mesh has corroded (due to moisture ingress causing mesh deterioration). The repair requires careful removal of the failed render layer without damaging the EPS substrate, application of a new base coat with fresh AR mesh, and a compatible finish coat to match the existing facade texture. NCC 2022 Spec C1.1 requires EIFS systems used as part of a fire-resistance construction to comply with system-level testing — confirm fire performance compliance with Mapei Australia before specifying on NCC-regulated walls.

Sto is a specialist EIFS manufacturer with a full system range including Sto Armat Classic (base coat mortar), Sto mesh (AR glass mesh), and StoSilco Colour (silicone resin finish coat). The silicone resin finish coat provides superior water repellency and colour retention compared to standard acrylic finishes, with high vapour permeability allowing moisture movement through the render system — important for EIFS facades where moisture management is critical to prevent internal condensation and EPS degradation. In Australian Class 2 strata EIFS remediation, Sto system products are preferred by EIFS specialist contractors who work within the Sto supply ecosystem and hold Sto applicator approval. The full-system approach ensures consistent base coat, mesh, and finish compatibility, and Sto provides system-level fire testing documentation to support NCC compliance claims. Confirm current Australian product names, fire compliance documentation, and applicator approval requirements with Sto Australia before specifying.

Dulux Acratex provides a polymer-modified render and texture coating system used widely in Australian strata facade repair. While not a full EIFS system in the traditional sense, Acratex render systems are used in EIFS repair contexts where the base coat layer is replaced with an Acratex polymer-modified render coat, AR mesh is embedded, and the Acratex texture finish coat is applied over the top. In Australian strata remediation, Dulux Acratex products are specified by painting and remedial contractors who work within the Dulux supply chain. The Acratex range provides a familiar, readily available alternative to specialist EIFS manufacturer products for render repair on non-fire-resistance-rated EIFS facades. For NCC fire-resistance-rated facades, only systems with documented system-level fire testing should be used — confirm with Dulux Technical. Confirm current Acratex product names, EIFS suitability, and any fire compliance requirements with Dulux Trade Technical before specifying.