• External stone veneer cladding over Megaform ICF where a cementitious waterproofing layer is required behind the adhered finish and where substrate planeness and deflection criteria are met by design and site controls.
• Substrate criteria include maximum deflection of L over 360 under live and dead load and planeness within ±2mm in 2m prior to membrane and stone installation.
• Low-rise and mid-rise façades are suitable, with engineered mechanical support introduced where height or stone mass triggers support requirements.

• Not a substitute for structural design, cavity and flashing requirements or negative-side waterproofing, coordinate with façade engineer and Megaform wall details for drainage paths, penetrations and junctions.
• Do not omit movement joints, do not bridge structural joints and do not exceed 3.0m centres without designer approval.
• Install within the TDS environmental limits, protect fresh membrane from rain and wind, and maintain curing windows before adhesive application.
• If the project includes substrate movement or cracking, tanking or negative-side waterproofing, structural concerns, unusual substrates, facades or decks, heated floors or chemical exposure, escalate to Surtec Technical for review prior to specification.

When designed and installed in accordance with this system and recognised practice, the system can contribute to NZBC E2 External Moisture when detailed with the BRANZ-appraised Rasolastik ADV/EVO membrane layer, and to NZBC B2 Durability and F2 Hazardous Building Materials for the finishes.

Technokolla systems with Rasolastik EVO membrane and C2 adhesives are used on exterior façades internationally and locally, with New Zealand pull-off testing on Megaform ICF assemblies showing average 0.79 MPa and block-failure mode indicating bond exceeding substrate strength in most cases.

• Rasolastik ADV/EVO is a cementitious, fibre-reinforced waterproofing with crack-bridging at low temperatures and suitability for chlorinated water contact per EN 14891 class CMO1P.
• RL80 bond-breaker bandage is installed at junctions and penetrations before over-coating.
• Adhesives are C2TES1 or higher deformable powders suited to large-format stone and exterior façades with non-slip placement and extended open time.