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StoPoren Panel (AAC) Cladding Construction

StoPoren Panel creates durable, solid substrates that are incombustible, sound absorbing and thermally stable. StoPoren Panels are 2200 x 600 x 50mm in dimension and are laid horizontally to build a solid permanent structure. The materials are easily cut allowing the designer freedom to create clean straight lines.

The autoclaved aerated concrete (AAC) panels (StoPoren panels) are fixed over high density polystyrene battens to form a 20 or 40 mm drainage cavity, or timber cavity spacers to form a 40 mm drainage cavity, allowing for a dry zone between the interior and exterior claddings and are coated in a Sto Plaster System of your 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 and 5 year renewable Workmanship Warranty plus Maintenance Schedule.

Key Features
  • BRANZ Appraised
  • 15 to 20 year warranty with maintenance schedule
  • Complete installation and supply by Sto registered LBP contractor
  • Easy to cut and detail plus easy assembly
  • Complete installation and supply plus easy assembly
  • Dry cavity design
  • Tested for mortar and strength
  • Solid panel veneer construction
  • Time efficient construction programme
  • Cost efficient building system for the residential market
  • Breathable lightweight concrete for vapour permeability
Scope of Use

The StoPoren Panel Cladding System has been appraised as an external wall cladding system for buildings within the following scope:

  • For residential and light commercial type buildings where domestic construction techniques are used. 
  • The scope limitations of NZBC Acceptable Solution E2/AS1, Paragraph 1.1
  • Constructed with timber framing complying with the NZBC.
  • With a risk score of 0-20, calculated in accordance with NZBC Acceptable Solution E2/AS1, Table 2

The StoPoren Panel Cladding System has also been appraised for weathertightness and structural wind loading within the following scope;

  • The scope limitations of NZBC Acceptable Solution E2/AS1, Paragraph 1
  • Constructed with timber and steel framing complying with the NZBC
  • Including wind pressures up to a maximum design differential ultimate limit state (ULS) of 2.5 kPa

StoPoren Panel is suitable for both residential and commercial buildings. For use with aluminium window and door joinery that is installed with vertical jambs and horizontal heads and sills.

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 B1 Structure: Performance B1.3.1, B1.3.2, B1.3.3, B1.3.4
  • Clause B2 Durability: Performance B2.3.1(b), B2.3.1(c), B2.3.2
  • Clause E2 External moisture: Performance E2.3.2
  • Clause F2 Hazardous building materials: Performance F2.3.1

Note: The StoPoren Panel Cladding System meets the performance requirements of NZBC Clause B2.3.1 (b), 15 years for the cladding system and plaster finish, and the performance requirements of NZBC Clause B2.3.1 (c), 5 years for the exterior paint system.

The StoPoren Panel Cladding System is expected to have a serviceable life of at least 30 years provided the system is maintained in accordance with this Appraisal, and the StoPoren panels, fixings and plaster are continuously protected by a weathertight coating and remain dry in service.

B1 Structure compliant
B2 Durability compliant
E2 External Moisture compliant
External Moisture
F2 Hazardous Building Materials compliant
Hazardous Building Materials
BRANZ Appraised
BRANZ Appraised
BIM files (link to page on supplier website)
CAD/PDF (link to page on supplier website)
Data Sheet
Environmental Information
Independent Appraisal (BRANZ)
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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