The StoPoren Panel Cladding System is a cavity-based external wall
cladding system using a steel reinforced Autoclaved Aerated Concrete (AAC)
panel. AAC is a solid, inert, lightweight concrete material suitable for both
residential and commercial buildings.
The system incorporates 50 mm thick AAC panels, which are fixed
over timber battens to form the cavity. The StoPoren render system consists of
a minimum 5 mm thickness of fibreglass mesh reinforced synthetic resin plasters
incorporating StoPoren basecoat render, StoArmat Classic meshed reinforcement
render, selected Stolit K, Stolit MP or Stolit Milano coloured finishing render
and selected StoColor facade paint or clear sealer.
Stolit K finishing renders are available in a flat 1.0, 1.5, 2.0 or 3.0
mm aggregate. Stolit MP, MP Natural and Milano are fine pre-coloured sponge
The StoColor System comprises 800+ colours for use in architecture — or
can be matched to any colour using the Sto Spectrometer to meet any design
Stoanz Limited recommends that the selected finish colour must have a
minimum Light Reflectance Value (LRV) of 25% (StoPoren Render System), or 20% (StoPoren
Armat Render System). Where a colour with an LRV of less than those noted above,
but above 15% (StoPoren Render System), or 10% (StoPoren Armat Render System)
is selected, two (2) coats of StoColor X-black heat reflective facade paint are
Using modern technology with enhanced and well-engineered materials,
this render cladding system provides a strong, durable and flexible solution
for a high performance facade.
Scope of use
The StoPoren Panel Cladding System has been appraised by BRANZ as an
external wall cladding system for buildings within the following scope:
scope limitations of NZBC Acceptable Solution E2/AS1, Paragraph 1.1; and,
a risk score of 0-20, calculated in accordance with NZBC Acceptable
Solution E2/AS1, Table 2; and,
in NZS 3604 Wind Zones up to, and including Extra High.
The StoPoren Panel Cladding System has also been appraised for
weathertightness and structural wind loading when used as an exterior wall
cladding for buildings within the following scope:
scope limitations of NZBC Acceptable Solution E2/AS1, Paragraph 1.1 with
regards to building height and floor plan area; and,
with timber and steel framing subject to specific engineering design; and,
in specific design wind pressures up to a maximum design differential
ultimate limit state (ULS) of 2.5 kPa.
The StoPoren Panel Cladding System must only be installed on vertical
surfaces (except for tops of parapets, sills and balustrades).
The system is appraised for use with aluminium window and door joinery
that is installed with vertical jambs and horizontal heads and sills.
New Zealand Building Code (NZBC)
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, B1.3.3(a), B1.3.3(h), B1.3.3(j), B1.3.3(q), B1.3.4
- Clause B2 Durability: Performance B2.3.1(b), B2.3.1(c), B2.3.2
- Clause C3 Fire affecting areas beyond the fire source: Performance C3.7
- Clause E2 External moisture: Performance E2.3.2
- Clause F2 Hazardous building materials: Performance F2.3.1
The StoPoren Panel Cladding System meets the requirements of Performance
B2.3.1(b) 15 years for the render, panel and cavity system, and the requirements
of Performance B2.3.1(c) 5 years for the paint finish.
The StoPoren Panel Cladding System will not present a health hazard to
The product has and can make available the following additional evidence to support the above statements:
The StoPoren system is expected to have a serviceable life of at least
30 years provided the system is maintained in accordance with the Sto
Specification, Warranty and BRANZ Appraisal, and the StoPoren panels, fixings
and renders are continuously protected by a weathertight coating and remain dry
Studs must be at maximum 600mm centres for buildings situated in NZS
3604 Wind Zones up to and including Extra High, and specifically designed
buildings in wind pressures up to an including design differential 2.5 kPa ULS.
The StoPoren render and finishing system has a
peak heat release rate less than 100 kW/m2 and a total heat released less than
25 MJ/m2. The system is suitable for use on buildings with a SH Risk Group
classification, at any distance to the relevant boundary. Refer to NZBC
Acceptable Solutions C/AS2 – C/AS6, Paragraph 5.8.1 for the specific exterior
surface finishes requirements for other building Risk Groups.
For a breakdown of system components, click here.
Installation and finishing of components and accessories supplied by
Stoanz Limited and the Sto registered contractor must be completed by trained
applicators, approved by Stoanz Limited.
Installation of the accessories supplied by the
building contractor must be carried out in accordance with the StoPoren Panel Technical Literature and the BRANZ Appraisal by, or under the supervision of a
Licensed Building Practitioner (LBP) with the relevant Licence Class.
Regular maintenance is essential to ensure the performance requirements
of the NZBC are continually met and to ensure the maximum serviceability of the
system. Carry out an annual inspection and record this on the Sto
Construction Systems Maintenance schedule.
(at least annually) of the paint coating is required to remove grime, dirt and
organic growth and to maximise the life and appearance of the coating. Grime may
be removed by brushing with a soft brush, warm water and detergent. The
paint system must be recoated at approximately 8-10 yearly intervals in
accordance with Stoanz Limited instructions. Clear sealer systems require
recoating at 5-7 yearly intervals.
With an increasing emphasis on the implementation of servicing exterior
building elements, Sto has launched the StoArmat 20 Year Warranty and
StoService Assurance documentation. This system, administered by Sto and
carried out by Sto Contractors, ensures all specified StoArmat Rendered Systems
are registered, serviced and certified every two and a half years to provide
assurance that all building elements pertaining to the rendered facade are
Refer to the StoArmat Warranty Document by clicking here.
Protecting the natural basis for life and improving
quality of life are important aims in social policy. Sto actively
pursues these aims, always acting in accordance with the company's
guiding principle: "Building with conscience."
In order to define and implement its ecological targets, Sto has
developed a system of environmental management conforming to
international standards. This relates to the entire process chain – from
the procurement of the raw product, to production, packaging and
||ISO 9001 (Quality Management)