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Concrete Block Construction

The StoArmat Miral Render System provides protection, system reliability and finish for concrete block construction. The concrete blocks are base coated and levelled with StoLevel Novo. Followed by the Application of StoArmat render and glass fibre mesh providing engineered reinforcement. The façade is then finished with Stolit finishing render plus a Sto Coating of choice.

Installations are carried out by a Sto Registered Licensed Building Practitioner with the added protection of a 15 or 20 year Sto System Warranty, renewable Workmanship Warranty plus StoService Assurance.

Key Features
  • 15 to 20 year warranty with maintenance schedule
  • Ready-to-use, to save on time and labour cost
  • Highly flexible and crack-proof
  • High durability and impact resistance
  • Highly resistant to mechanical stress
  • Excellent weathertight and water repellent properties
  • Range of finishes
  • For residential and commercial applications
  • StoArmat provides maximum crack and shock resistance six times higher then that of cement-based products
  • The glass fibre mesh is an alkali-resistant reinforcing mesh with total uniform force absorption and it reliably dissipates tensile and shear stress
Scope of Use

The StoArmat Miral Plaster System on Concrete Block has been appraised as solid plaster systems for buildings within the following scope:

  • Up to 3 storeys, with a maximum height from ground to eaves of 10m
  • For Supporting structures designed and constructed in accordance with the NZBC
  • Suitable for use in all Wind Zones of NZS 3604 up to, and including, ‘Extra High’

The StoArmat Miral Plaster System has also been appraised for bond, durability and weather tightness.

Limitations on Use

Must only be applied on vertical surfaces except for sills, concrete reinforced parapets and concrete reinforced balustrades. For use with aluminium window and door joinery that is installed with vertical jambs and horizontal heads and sills.

NZS 3604 Wind Zone Extra High suitable
Extra High Wind Zone
Statement of Building Code Compliance

The product will, if employed in accordance with the supplier's installation and maintenance requirements, assist with meeting the following provisions of the building code:

  • Clause B2 Durability: Performance B2.3.1(b), B2.3.1(c)
  • Clause E2 External moisture: Performance E2.3.2
  • Clause F2 Hazardous building materials: Performance F2.3.1

Notes: The StoArmat Miral Plaster Systems meet the performance requirements of NZBC Clause B2.3.1 (b), 15 years for the plaster finishes, and the performance requirements of NZBC Clause B2.3.1 (c), 5 years for the exterior paint system.

B2 Durability compliant
E2 External Moisture compliant
External Moisture
F2 Hazardous Building Materials compliant
Hazardous Building Materials
BRANZ Appraised
BRANZ Appraised
Data Sheet
BRANZ Appraisal

No. 515 [2018]

Specification Clause/Guide
Installation and Operation

Sto supply facade insulation systems and manufacture high-quality exterior and interior render systems and coatings worldwide.

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