4282SP
STO POREN PANEL CLADDING SYSTEM
1
GENERAL

If you have pre-customised this work section using the "questions and answers" provided as part of the downloading process, it may be necessary to amend some clauses to suit the final project-specific version.

 

The section must still be checked and customised to suit the project being specified, by removing any other irrelevant details and adding project-specific details and selections.

 

This section relates to the supply and fixing of Sto Poren Panel Cladding System using reinforced 50mm aerated concrete panels finished in the Sto Poren Plaster System fixed to timber/metal framing on a drained/ventilated cavity.

Suitable for residential and commercial building.

Modify or extend the above description to suit the project being specified.

1.1
RELATED WORK

Refer to ~ for ~

Include cross references to other sections where these contain related work.

1.2
ABBREVIATIONS AND DEFINITIONS

Refer to the general section 1232 INTERPRETATION & DEFINITIONS for abbreviations and definitions used throughout the specification.

 

The following abbreviations apply specifically to this section:

AAC

Autoclaved Aerated Concrete

ICF

Insulating Concrete Formwork

LRV

Light Reflectance Value

MPNZA

Master Painters New Zealand Association

LBP

Licensed Building Practitioner

RBW

Restricted Building Work

Documents
1.3
DOCUMENTS

Refer to the general section 1233 REFERENCED DOCUMENTS. The following documents are specifically referred to in this section:

NZBC B2/AS1

Durability

NZBC C/AS1-AS7

Protection from fire

NZBC E2/AS1

External moisture

AS/NZS 1170.2

Structural design actions - Wind actions

NZS 3602

Timber and wood-based products for use in building

NZS 3604

Timber-framed buildings

NZS 4210

Masonry construction: Materials and workmanship

AS/NZS 4858

Wet area membranes

AS 3566

Self-drilling screws for the building and construction industries

WorkSafe NZ:

Guidelines for the provision of facilities and general safety in the construction industry

MPNZA

Health and Safety Programme

Health and Safety at Work Act 2015

NZ NASH Standard Residential and low-rise steel framing Part 1: Design Criteria

Delete from the DOCUMENTS clause any document not cited. List any additional cited documents.

The following are related documents and if referred to in the work section need to be added to the list of DOCUMENTS.

AS/NZS 2311

Guide to the painting of buildings

NZBC F2/AS1

Hazardous building materials

WANZ Installation Guide

The WANZ Guide to Window Installation as described in E2/AS1 Amendment 6

1.4
MANUFACTURER/SUPPLIER DOCUMENTS

Manufacturer's and supplier's documents related to this part of the work:

Sto Manual including specification and CAD details - www.sto.co.nz

Sto Technical data sheets

Sto Quality Assurance Document

BRANZ Appraisal 772 - Sto Poren Panel Cladding System

BRANZ Test No. DC1182 StoFlexyl waterproofing to AS/NZS 4858

BRANZ Fire Test FH 3971 185 minute test to AS 1530.4 without failure

BRANZ Fire Test FH 5008 StoPoren Plaster, NZBC C/AS1-AS7, 5.8 External Surface Finishes - pass

BRANZ Fire Test FH 5009 StoArmat Plaster, NZBC C/AS1-AS7, 5.8 External Surface Finishes - pass

 

Manufacturer/supplier contact details

Company:

Stoanz Ltd

Web:

www.sto.co.nz

Email:

info@sto.co.nz

 

technical@sto.co.nz

Telephone:

04 801 7794

 

04 801 4741

It is important to ensure that all personnel on site have access to accurate, up to date technical information on the many products, materials and equipment used on a project.  In most cases individual products are not used in isolation, but form part of a building process.  Also a particular manufacturer's and/or supplier's requirements for handling, storage, preparation, installation, finishing and protection of their product can vary from what might be considered the norm.  Access to technical information can help overcome this potential problem.

Warranties
1.5
WARRANTY - MANUFACTURER/SUPPLIER

Provide a material manufacturer/supplier warranty:

15 years:

For materials supplied by Stoanz Ltd

20 years

For materials in the StoArmat Plaster System

 

  • Provide this warranty on Sto standard form including Sto Contractor PS3.
  • Commence the warranty from the date of practical completion of the contract works.

 

Refer to the general section 1237 WARRANTIES for additional requirements.

Modify or expand the clause to suit project or manufacturer/supplier requirements, options include:

  • Change the standard form to be used (check with the manufacturer/supplier, use the general section 1237WA WARRANTY AGREEMENT if required)
  • Commence the warranty from the date of purchase (check with the manufacturer/supplier)
1.6
WARRANTY - INSTALLER/APPLICATOR

Provide an installer/applicator warranty:

5 years:

For execution and workmanship

 

  • Provide Sto Contractor PS3 warranty as part of Sto Warranty documentation
  • The Sto Contractor must complete a Sto Quality Assurance Document pre-warranty.
  • Commence the warranty from the date of practical completion of the contract works.

 

Refer to the general section 1237 WARRANTIES for additional requirements.

Modify or expand the clause to suit project or installer/applicator requirements, options include:

  • Change the standard form to be used (check with the installer/applicator, use the general section 1237WA WARRANTY AGREEMENT if required)
  • Commence the warranty from the date of installation (check with the installer/applicator)
Requirements
1.7
QUALIFICATIONS

Installers/applicators to be registered by Sto and experienced in the installation and application of the Sto Poren Panel Cladding System.

All work to be installed or supervised by a licensed building practitioner (LBP) with the appropriate certification.  RBW must be supervised by an LBP.

1.8
NO SUBSTITUTIONS

Substitutions are not permitted to any of the specified systems, components and associated products listed in this section.

1.9
PROTECTION OF NEW PLASTER

Provide protection systems as required by the manufacturer to protect fresh plaster from adverse weather conditions.

Normally required curing procedures can be altered when acrylic-modified plasters (bonding agents) have been specified.  Such plasters may only need limited protection from direct sun and strong, drying winds.  Consult the manufacturer's requirements in this clause or write another.

1.10
INSPECTIONS

Allow to inspect the whole of the work at each stage.  Determine a programme for inspections including notification when each part and stage of the work is ready for inspection prior to the work commencing.

 

Permit representatives from Sto to inspect the work in progress and to take samples of their products from site if requested.  Refer to Sto Manual or web site for current details.

1.11
FINISH SAMPLE

If requested submit one 300mm x 300mm standard panel of the selected finish texture and colour for approval.  Obtain signature of acceptance on sample and return to the approved applicator.

In some instances a larger sample panel may be warranted.

1.12
INFORMATION FOR OPERATION AND MAINTENANCE

Provide Sto Poren Maintenance Schedule with Sto Warranty documents on practical completion for issuing to the building owner and Building Consent Authority.

A copy of the maintenance instructions may be required by the Building Consent Authority with the building consent application.

1.13
HEALTH AND SAFETY

Refer to the requirements of the Health and Safety at Work Act 2015 and WorkSafe NZ:  Guidelines for the provision of facilities and general safety in the construction industry.

If the elimination or isolation of potential hazards and risks is not possible then minimise hazards and risks in this work on site by using the proper equipment and techniques as required in the MPNZA Health and Safety Programme.  Supply protective clothing and equipment.  Inform employees and others on site of the hazards and risks, and put into place procedures for dealing with emergencies.  Obtain from Sto the material safety data sheets for each product.  Keep sheets on site and comply with the required safety procedures.

Compliance information
1.14
DURABILITY

The work covered by this part of the specification has been designed and constructed to meet the NZBC durability requirement of 15 years with a serviceability life in excess of 30 years when maintained.  Refer to the following:

BRANZ Appraisal 772 - Sto Poren Panel Cladding System

1.15
INFORMATION REQUIRED FOR CODE COMPLIANCE

Provide the following compliance documentation: -

  • Sto Warranty document package including Sto warranty, Sto Contractors PS3 warranty and Sto Maintenance Schedule
  • Other information required by the BCA in the Building Consent Approval documents.

List the Producer Statements - Construction (PS3) required from installers that are required as a condition of carrying out this work.

List also Producer Statements - Construction Review (PS4) required from consultants to be engaged by the Contractor.

Producer Statement - Design (PS1), may be required where certain design work is undertaken by the Contractor or manufacturer.

Performance - wind

The next two mutually exclusive clauses, are setting a standard of performance for design by the contractor to meet.  Specifiers should therefore consider adding some means of confirming (say by testing or certification) that the performance criteria will be or have been met.  Delete the clause which does not apply.

Ensure correct information is supplied in 1220 PROJECT.

1.16
DESIGN PARAMETERS - NON SPECIFIC DESIGN

Design the framing to the wind zone parameters of NZS 3604, table 5.4.

Refer to general section 1220 PROJECT for details.

Delete the clause if using DESIGN PARAMETERS - SPECIFIC DESIGN.

1.17
DESIGN PARAMETERS - SPECIFIC DESIGN

Design the framing to the wind pressure parameters of AS/NZS 1170.2.

Refer to general section 1220 PROJECT for details.

Obtain information from the project structural engineer.

Delete the clause if using DESIGN PARAMETERS - NON SPECIFIC DESIGN.

1.18
DESIGN PARAMETERS - STO POREN PANEL CLADDING

The Sto Poren Panel Cladding system when fixed in accordance with the Sto Poren manual and specifications has been tested by BRANZ to differential design ULS wind pressure of 2.5 kPa or 59.5 m/s (extra high wind zone 2.13 kPa or 55 m/s).

Obtain information from the project structural engineer for wind zones in excss of 2.5kPa.

Tests
1.19
TESTS

Refer to the following:

  • BRANZ Test No. DC1182 StoFlexyl waterproofing to AS/NZS 4858 for waterproof membranes
  • BRANZ Fire Test FH 5008 StoPoren Plaster, NZBC C/AS1-AS7, 5.8 External Surface Finishes - pass
  • BRANZ Fire Test FH 5009 StoArmat Plaster, NZBC C/AS1-AS7, 5.8 External Surface Finishes - pass
  • BRANZ Fire Test FH 3971 185 minute test to AS 1530.4 without failure
2
PRODUCTS
Materials
2.1
STO POREN AAC PANELS

Sto Poren Panel, a lightweight steel reinforced autoclaved aerated concrete panel 2200mm x 600mm x 50mm thick.

Components
2.2
STO POREN PANEL FIXINGS - TIMBER FRAME 20MM CAVITY

To 3566 and NZBC E2/AS1.  Sto Poren 100mm long Grade 304 stainless steel batten screws in NZS 3604 defined Exposure Zones B, C, D and E.

100mm long Corrosion Class 4 wood screws with a head diameter of 14mm and a shank diameter of 5.1mm in NZS 3604 defined Exposure Zones B and C.

2.3
STO POREN PANEL FIXINGS - STEEL FRAME 20MM CAVITY

To AS 3566 and NZBC E2/AS1.  100mm long Corrosion Class 4 self-drilling screws with a head diameter of 14mm and a shank diameter of 5.1mm in NZS 3604 defined Exposure Zones B and C.

Sto Poren 100mm long Grade 304 stainless steel in NZS 3604 defined Exposure Zones D and E.

2.4
STO POREN PANEL FIXINGS - TIMBER FRAME 40MM CAVITY

To AS 3566 and NZBC E2/AS1.  120mm long Corrosion Class 4 self-drilling wood screws with a head diameter of 14mm and a shank diameter of 5.1mm, in NZS 3604 defined Exposure Zones B and C.

120mm long Grade 304 stainless steel in NZS 3604 defined Exposure Zones D and E.

2.5
STO POREN PANEL FIXINGS - STEEL FRAME USING 40MM CAVITY BATTENS

To AS 3566 and NZBC E2/AS1.  120mm long Corrosion Class 4 self-drilling screws with a head diameter of 14mm and a shank diameter of 5.1mm in NZS 3604 defined Exposure Zones B and C.

Sto Poren 120mm long Grade 304 stainless steel in NZS 3604 defined Exposure Zones D and E.

2.6
STO POREN PANEL ADHESIVE

AAC 2 hour fastgrip polyurethane adhesive or Poren Mineral Panel Adhesive for bonding Sto Poren panel joints during construction prior to plastering.

2.7
EXTERIOR 20MM CAVITY BATTENS

50mm x 20mm very high (VH) density (minimum 28kg/m³) polystyrene battens or nominal 18mm x 45mm H3.1 treated timber battens.

2.8
EXTERIOR 40MM CAVITY BATTENS OR SPACERS

50mm x 40mm very high (VH) density (minimum 28kg/m³) polystyrene battens or 40 x 40 x minimum 200mm long H3.1 treated timber spacers cut with a 22°slope away from the frame at the head and bottom.

Select 20mm or 40mm cavity space.

Waterproofing plaster
2.9
STOFLEXYL WATERPROOFING PLASTER

StoFlexyl, a cementitious dispersion leveller containing additives and binders mixed 1/1 with Portland Cement.

Used for warerproofing parapets, balustrades, horizontal surfaces and foundations.

StoPoren plaster system
2.10
S-PROTECT WS205 SILANE

S-Protect WS205 Silane, a European silane sealer with water repelling properties.

2.11
STOPOREN PLASTER

StoPoren Plaster 4/5mm, a European designed fibre reinforced AAC mineral plaster with good adhesion properties, water retention agents and machine application properties, 4mm to 5mm thick.

2.12
STO EUROPEAN REINFORCING MESH

Alkali-resistant fibreglass woven reinforcing mesh with a nominal size of 4mm x 4mm or 6mm x 6mm square and a weight of 165 g/m².

2.13
STOPLEX W SEALER

StoPlex W Sealer, a consolidating primer with siloxane additives.  Deep penetration for consolidation with absorbency regulating and water repelling properties.

2.14
STOLIT K & MP COLOURED FINISHING RENDERS

European fibre reinforced coloured finishing renders in a pail.  Organic bound, strong, hardwearing, impact resistant coloured finishing render, available in 6 finishes.  Refer to SELECTIONS for texture and colour range.

2.15
STOCOLOR MAXICRYL FACADE PAINT

Matt coloured pure acrylate facade paint.  Natural looking matt, hard, durable, coating with excellent resistance to weathering.  Refer to SELECTIONS for colour.

2.16
S-PROTECT SC STAY CLEAN

Clear, invisible Silane sealer for added protection against staining of coloured sponge finishes.

Select for sealing Stolit MP or MP Natural renders

StoArmat Miral plaster system
2.17
S-PROTECT WS205 SILANE

S-Protect WS205 Silane, a European silane sealer with water repelling properties.

2.18
STOPOREN BASECOAT PLASTER

StoPoren Plaster 4/5mm, a European designed fibre reinforced AAC mineral plaster with good adhesion properties, water retention agents and machine application properties, 4mm to 5mm thick.

2.19
STOARMAT CLASSIC REINFORCEMENT PLASTER

StoArmat Classic Reinforcement Plaster, a European manufactured, fibre reinforced, strong, flexible, impact resistant, white reinforcing plaster containing a calibration grain to ensure correct plaster thickness.

2.20
STO EUROPEAN REINFORCING MESH

Alkali-resistant fibreglass woven reinforcing mesh with a nominal size of 4mm x 4mm or 6mm x 6mm square and a weight of 165 g/m².

2.21
STOLIT K & MP COLOURED FINISHING RENDERS

European fibre reinforced coloured finishing renders in a pail.  Organic bound, strong, hardwearing, impact resistant coloured finishing render, available in 6 finishes.  Refer to SELECTIONS for texture and colour range.

2.22
STOCOLOR MAXICRYL FACADE PAINT

Matt coloured pure acrylate facade paint.  Natural looking matt, hard, durable, coating with excellent resistance to weathering.  Refer to SELECTIONS for colour.

2.23
S-PROTECT SC STAY CLEAN

Clear, invisible Silane sealer for added protection against staining of coloured sponge finishes.

Select for sealing Stolit MP or MP Natural renders.

Accessories
2.24
FLASHINGS

Head, jamb, sill and any other required flashings made from powder coated aluminium, stainless steel or uPVC supplied by main contractor for timber, aluminium and uPVC joinery to NZBC E2/AS1 and specific construction requirements.

2.25
STO FLASHINGS AND COMPONENTS

Sto uPVC flashings, finishing edges, trays, etc, are to be used for weatherproofing the exterior plaster at joinery transitions, junctions, terminations, cavities and for forming corners and drip edges.

2.26
STO CONTROL JOINTS

Sto uPVC 8mm or 12mm uPVC control joints.

2.27
ARCHITECTURAL MOULDINGS

AAC or polystyrene shapes used to create decorative detailing, fixed using AAC construction adhesive or GlueCoat mortar applied to the shape prior to placing over the plaster mesh coat.

2.28
STO JOINT SEAL TAPE

An expanding polyurethane impregnated waterproof Inseal tape for weatherproofing exterior control joints, 2/6mm tape for joints up to 6mm or 5/12mm for joints up to 12mm.

Use as a primary or secondary weatherproof seal as per the Sto details.

2.29
SEALANT

BRANZ appraised modified silicone (MS) sealant.

2.30
STEEL PRIMER

Zinc rich spray pack primer or anti corrosion steel primer.

3
EXECUTION
Conditions
3.1
SUBSTRATE - TIMBER FRAMING

Do not commence work until the framing is of the standard required for the specified finish; plumb, level and in true alignment.  Moisture content of timber framing must not exceed the requirements specified by NZS 3602 to minimise shrinkage and movement after the panels are fixed.  Studs are not to exceed 600mm centres and nogs fitted flush at a maximum of 800mm centres.  Wall underlay to comply with NZBC E2/AS1 including Table 23.  Main contractor to confirm framing has moisture content of a maximum of 24% prior to commencing installation.

3.2
SUBSTRATE - STEEL FRAMING

Check framing to NZ NASH Standard Residential and low-rise steel framing Part 1: Design Criteria and AS/NZS 4600 and NZBC E3/AS1.

For steel framing C section studs and nogs, the minimum section size to be 75mm x 32mm with a web thickness of 0.75mm.

3.3
STO POREN PANEL SUBSTRATE

Do not commence work until openings and apertures have been cut, pipes, fixtures, fixing blocks have been fixed and underlay flashings and other preparations are complete.  Rectify all defects in substrate prior to application of plaster coatings.  Ensure that backgrounds and adjoining surfaces are, after the preparation called for in this section, is of the required standard for the Sto Poren Cladding System.

3.4
MASONRY AND CONCRETE SUBSTRATE

Refer to Sto Poren technical details for cladding details at or over the foundations.

3.5
FLASHING AND DETAILING

Comply with NZBC E2/AS1, 4.0 Flashings and Sto Poren penetration flashing guidelines.  Carry out to the required standard of execution to ensure water does not penetrate.

Proprietary flashings are required  for recessed timber, aluminium and PVC joinery.  Sub-trade penetrations must be flashed and sealed by that trade.

3.6
STANDARDS AND TOLERANCES

Comply with the tolerances laid down in NZS 4210 Table 2.2.  To have no deviation more than 3mm from a straight edge 1200mm long.  Abrupt deviations will not be accepted.

3.7
CONFIRM LAYOUT

Before commencing work confirm the layout of control joints and other visual detailing of the finished work.

Installation - Sto Poren Panels
3.8
PENETRATIONS - PREPARATORY WORK

Confirm that exterior wall openings have been prepared correctly for all window and door joinery and other penetrations through the cladding.  Required preparatory work includes the following:

  • Wall underlay installed and dressed into openings with flexible flashing tape ready for the installation of window and door frames and other penetrations
  • Window joinery wider than 600mm requires a joinery support bar
  • Position aluminium window and door joinery to achieve 23mm to 24mm from the back of the joinery flange to the selected underlay
  • Installation of flashings required to be installed prior to panel installation
  • Where electrical cables pass through cladding use conduit so cables can be serviced, penetrations can be flashing taped and ensure that there is no contact with the polystyrene battens.
  • All penetrations such as water pipes, ducting, light fittings, must be installed with a minimum of 5° outward slope and be sealed to the wall underlay by the contractor who installed them.

Refer to the WANZ Installation Guide. This covers the WANZ recommendations on the preparation of window/door openings, minimum clearances between rough openings and the window/door frame, dressing of the wall underlay into the prepared opening, application of flexible flashing tape to the sill and top corners of the opening, installation of window/door frames and flashings, sealing of the window/door frame into the opening to create a pressure equalisation cavity, installation of flashings and the maintenance of appropriate clearances between the frame and the surrounding construction.

Penetrations through drained cavities to   NZBC E2  /AS1: External moisture, 9.1.9 Penetrations and 9.1.10 Windows and doors

Consult Sto Manual for specifications and CAD details in regards to wall penetrations.

3.9
FLASHINGS AND FOOT TRAYS - OVER HANGING FOUNDATION

Fit Sto jamb and sill flashings to joinery, main contractor supplied heads flashings, Sto vented base caps and Sto vented adjustable foot trays to line ready for the panel installation.

3.10
REBATED FOUNDATIONS

Where a rebated foundation is detailed apply StoFlexyl waterproofing to the rebate before aligning the panel through on a maximum 20mm Poren Mortar bed with cavity vents to achieve 1000mm² venting per lineal metre.  Finish plaster on Sto finishing edge at foundation to prevent cracking and separate plastered foundation from cladding.

Note that it is important that the openings in the cavity closer/vermin proofing are kept clean and unobstructed in order to maintain drainage and venting of the cavity.

3.11
20MM CAVITY BATTENS

Temporarily fix selected 20mm battens full length to studs to achieve a 20mm minimum thickness drained cavity to NZBC E2/AS1, 9.0 Wall claddings.  The battens are permanently fixed by the cladding fixings which will penetrate the wall framing studs through the wall underlay.  The top of the cavity must be blocked to prevent air flow into the roof space.  Install cavity closer/vermin proofing at base of wall, open horizontal (or raking) junctions, over openings (windows, services etc).  Horizontal cavity battens must be a minimum 50mm from any vertical cavity battens and fixed at a 5° slope.  Fix additional battens to internal and external corners and around openings in accordance with Sto Poren Panel's standard details.

Note that it is important that detailed drainage gaps and cavity vents remain unobstructed in order to maintain drainage and venting of the cavity.

3.12
40MM CAVITY BATTENS OR TIMBER H3.1 SPACERS

Temporarily fix selected 40mm battens or spacers to the studs to achieve a 40mm drained cavity in accordance with the BRANZ Appraisal 772.  The battens are permanently fixed by the cladding fixings which penetrate the studs.  The top of the cavity must be blocked to prevent air flow into the roof space.  Install cavity closer/vermin proofing at base of wall, open horizontal (or raking) junctions, over openings (windows, services etc).  Horizontal cavity battens must be a minimum 50mm from any vertical cavity battens and fixed at a 5° slope.  Fix battens to internal and external corners and around openings in accordance with Sto Poren Panel's standard details.

Note that it is important that detailed drainage gaps and cavity vents remain unobstructed in order to maintain drainage and venting of the cavity.

3.13
STO POREN PANEL FIXED OVER CAVITY BATTENS

Fit the Sto Poren panel in accordance with Sto Poren Panel's specifications and CAD details.  Sto Poren Panel can be joined off the studs with all vertical joints staggered (brick pattern), all panel edges must be bonded with 2 hour fastgrip Polyurethane Adhesive or Poren Mineral Panel Adhesive as the panels are being installed.  Screw fix panels through the cavity battens into the wall framing countersinking 5mm to a maximum 12mm (depending on thickness of rigid underlay) to achieve a minimum 30mm embedment in the framing prior to mesh coat being applied.  All corners should be castellated and any exposed steel primed.  Vertical panel edges do not require edge fixing, except at window and door openings that normally require double studs.  Cut from multiple panels to avoid narrow widths at soffits etc.

3.14
STO POREN PANEL FIXED DIRECTLY TO OR OVER SOLID SUBSTRATES

Fix Sto Poren Panel to solid substrates using Sto GlueCoat mortar notch trowel onto the substrate allow to cure and mechanically fix with Sto Masonry Anchors driven into predrilled holes at 600mm centres maximum.

Where the cavity is extended over a solid substrate for aesthetic reasons the Sto Poren Panel can be fixed over cavity battens using Sto Masonry Anchors at 250mm centres.

Solid substrates such as concrete blocks, brick, precast concrete.

3.15
BALUSTRADE AND PARAPET TOPS / FOUNDATION DETAIL

Provide a minimum slope of 10° on all horizontal surfaces.  To base coated surfaces apply StoFlexyl / meshed waterproofing correctly mixed with Portland cement extending 75mm up and down any adjacent vertical plaster surfaces.  Allow to dry and apply the StoPoren or StoArmat mesh coat.  StoFlexyl waterproofing must attain a minimum thickness of 1.5mm to meet NZBC E2/AS1 and AS/NZS 4858.  For concrete foundation details StoFlexyl is applied from 150mm above ground extending 100mm past the finished plaster system.

3.16
INSTALL CONTROL JOINTS

Provide control joints in the cladding system in accordance with Sto Poren Panel's specifications and CAD details or to coincide with control joints in the substrate and/or junctions between dissimilar materials or where shown on the project drawings.  Insert Sto flexible uPVC 8mm or 12mm control joints in the StoArmat mesh coat ensuring the mesh coat does not overlay the V joint.  Either coat the V joint in the paint system for a negative detail or fill with MS sealant, concave tooled.

Refer to Sto technical manual and engineers requirements for the position of substrate control joints and Sto CAD drawings and specification for positioning / detailing of control joints in the plaster system.  Vertical Control Joints required at maximum 8m centres.

3.17
INTER STOREY JOINTS

Provide inter storey joints in the cladding system in accordance with Sto Poren Panel's specifications and CAD details.  Horizontal control joints are required at maximum 7m or at inter storey junctions where unseasoned timber joists have been used.

Refer to Sto technical manual and engineers requirements for the position of control joints and Sto CAD drawings and specification for positioning / detailing of control joints.

3.18
PROVIDE ARCHITECTURAL PROFILES

Fix architectural profiles, (normally AAC or pre-meshed poly mouldings) used to create detailing or cover or inter storey control joints, after the substrate has been mesh plastered or waterproofed.  Attach using Gluecoat mortar applied to the back face.  Mechanical fixings may be required for larger or heavy profiles.  All plant on shapes are to be pre-meshed and to be meshed on to the base mesh plasterer before the finishing plastering commences.

Refer to Sto technical manual and engineers requirements for the position of control joints and Sto CAD drawings and specification. for positioning / detailing of control joints.

Horizontal Control Joints required at maximum 7m centres or at inter storey junctions where  unseasoned timber joists have been used.

3.19
INSTALL STO UPVC CORNER ANGLES AND FINISHING EDGES

Install all Sto pre meshed uPVC corner angles and finishing edges to external corners and terminations as required.  Bed in StoPoren plaster set straight to line before commencing to install in mesh coat application.

3.20
IRREGULARITIES

Before commencing fill voids glue inject cracks and flush out damage to straighten the cladding and finish by rasping back any edges over fills.

3.21
PENETRATIONS - SERVICES

Install all penetrations such as waste pipes, electrical wiring in uPVC conduits and metal plumbing piping with a minimum 5° downward slope, through the StoPoren plaster system, and seal using a double application of MS sealant.

3.22
SEALANT INSTALLATION

All junctions between joinery / adjacent surfaces / dissimilar materials sections and the plaster mesh coat and around penetrations shall be sealed with MS sealant.  Allow to cure before applying finishing plaster.

Use on all plaster systems, refer to Sto CAD drawings and specifications.

Waterproofing system
3.23
APPLY WATERPROOFING SYSTEM

Apply StoFlexyl waterproofing plaster in accordance with Sto Poren Specification and CAD drawings.

Conditions - plaster systems
3.24
DELIVERY

Keep StoPoren bagged plaster products dry in transit.  Take delivery of StoPoren plaster products in good condition.  Reject all damaged materials and immediately notify supplier in writing.

3.25
STORAGE

Deliver all materials in original unopened packaging with labels intact.  Provide dry storage on site, stack carefully, protect from mechanical damage.  Keep bagged render dry and off concrete surfaces.

3.26
PLASTERING CONDITIONS

Carry out plastering to Sto specification under conditions which will not adversely affect the finished work.

Refer to Sto product manual.

3.27
PROTECTION

Before commencing, apply masking protection to all joinery, pipes, roofs and adjacent surfaces likely to be marked.  Use covers to keep the working areas clean and remove any contamination of finished work immediately.

3.28
SUBSTRATE

Ensure the main contractor and the sub trades are aware of their responsibilities relating to the required provision of weather tight details at all dissimilar material overlays, junctions, penetrations, clearances and transitions including any blockings or back flashings required (refer to www.sto.co.nz for details).

 

Do not commence work until required openings and apertures have been cut, pipes, fixtures, fixing plates have been installed and flashings and other detailing are complete.  Do not commence plastering until the Sto approved contractor accepts the substrate is of the required standard.

3.29
FLASHING AND DETAILING

Install flashing in accordance with the Sto Poren Panel flashing details.  Penetrations such as waste pipes and fixing brackets shall be adequately flashed and waterproofed prior to plaster application.  Carry out to the required standard of execution to ensure water does not penetrate.

Flashings made from powder coated aluminium supplied by main contractor for timber, aluminium and PVC joinery if required depending on specific details.  Subtrade penetrations must be detailed, flashed and sealed by that trade.

Plaster systems

Refer to StoPoren specification and technical data sheets for 2 different finishing systems:

 

StoPoren Plaster System: Standard Spec SS500

 

StoArmat Miral Plaster System: Standard Spec SS501

StoPoren Plaster System - standard spec SS500
3.30
SURFACE PREPARATION AND PRE-TREATMENT OF STO POREN PANELS

All surfaces must be rasped where necessary to remove excess bonding, mortar or nibs on the surface and to ensure that all panel joints are flush and true.  Any minor surface damage can be fixed using plaster.

3.31
PANEL SEALER

To clean dry panel surfaces apply one coat of S-Protect WS 205 Silane sealer by back pack sprayer and block brush to seal the surface.

3.32
CONTROL JOINTS

Mark out all control joints that have been installed in the substrate so that Sto uPVC control joints can be installed in the mesh coat.

Refer to Sto specification and CAD drawings for specific project control joint details.

3.33
BALUSTRADE AND PARAPET TOPS / BASE DETAIL

A minimum slope of 10° is required on all horizontal surfaces.  To sealed surfaces apply StoFlexyl waterproofing correctly mixed with Portland cement extend 75mm up and down any adjacent vertical plaster surfaces and embed Sto mesh before applying a finishing coat.  StoFlexyl waterproofing must attain a minimum thickness of 1.5mm to meet NZBC E2/AS1 and AS/NZS 4858.  For concrete foundation details StoFlexyl is applied from 150mm above ground extending 100mm past the finished plaster system.

3.34
BASE MESH COAT PLASTER

To clean sealed Sto Poren Panel surfaces, apply one levelling/straightening coat of StoPoren base plaster at the 3mm - 4mm setting corner angles as required.  While the plaster is still wet, lightly embed Sto mesh, ensuring adjacent drops of mesh are overlapped by a minimum of 75mm and the mesh is embedded onto the plaster.  Allow to dry and apply one further coat of StoPoren plaster at 2mm to achieve a level plane surface free of hollows and deviations.

Use to level substrate and create straight plane to minimum thickness of 4.0mm.

3.35
SEALER

To clean dry plastered surfaces apply one coat of Stoplex W sealer by back pack sprayer and block brush to seal the surface.

3.36
COLOURED FINISHING RENDER

Apply selected Stolit K or MP coloured finishing render applied with a stainless steel trowel gauging to the thickness of the aggregate size and finished with a plastic float to the requisite pattern.  Apply Stolit MP or MP Natural in two coats and finish with a float and judicial use of a damp sponge.

Thickness and styles of renders varies between Stolit K- 1 / 1.5 / 2 / 3mm & Stolit MP/MP Natural - sponge.  Refer to SELECTIONS to choose required finishing render.  Refer to SELECTIONS for preferred finish.

3.37
STOLIT K FAÇADE COAT

Apply one coat of StoColor Maxicryl matt facade paint tinted to the selected colour on Stolit K render.

Refer to SELECTIONS for preferred finish.

3.38
STOLIT MP SEALER COAT

Apply one coat S-Protect SC stay clean sealer on MP finishes.

Refer to SELECTIONS for preferred finish.

StoArmat Miral Plaster System - standard spec SS501
3.39
SURFACE PREPARATION AND PRE-TREATMENT OF STO POREN PANELS

All surfaces must be rasped where necessary to remove excess bonding, mortar or nibs on the surface and to ensure that all panel joints are flush and true.  Any minor surface damage can be fixed using plaster.

3.40
PANEL SEALER

To clean dry panel surfaces apply one coat of S-Protect WS 205 Silane sealer by back pack sprayer and block brush to seal the surface.

3.41
CONTROL JOINTS

Mark out all control joints that have been installed in the Sto Poren Panel substrate so that Sto Poren uPVC control joints can be installed in the mesh coat.

Refer to Sto specification and CAD drawings for specific project control joint details.

3.42
BASECOAT PLASTER

To clean sealed surfaces, apply one levelling/straightening coat of StoPoren basecoat plaster at the required thickness of 4mm - 6mm setting corner angles and finishing edges as required to achieve a level plane surface free of hollows and deviations.

Use to level substrate and create straight plane to minimum thickness of 3mm.

3.43
MESHED REINFORCEMENT PLASTER

To dry StoPoren surfaces apply one even coat of StoArmat reinforcement plaster at approximate thickness 1.5mm / 2mm.  While the plaster is still wet, lightly embed Sto European mesh, ensuring adjacent drops of mesh are overlapped by a minimum of 75mm and the mesh is embedded onto the plaster.  Allow to dry and apply one further coat of StoArmat at approximate thickness of 1.5mm.  Once dry remove any slight ridging with a Sto rasp.

3.44
BALUSTRADE AND PARAPET TOPS / BASE DETAIL

A minimum slope of 10° is required on all horizontal surfaces.  To basecoat plastered surfaces apply StoFlexyl waterproofing correctly mixed with Portland cement extend 75mm up and down any adjacent vertical plaster surfaces and embed Sto mesh before applying a finishing coat.  StoFlexyl waterproofing must attain a minimum thickness of 1.5mm to meet NZBC E2/AS1 and AS/NZS 4858.  For concrete foundation details StoFlexyl is applied from 150mm above ground extending 100mm past the finished plaster system.

3.45
COLOURED FINISHING RENDER

Apply selected Stolit K or MP coloured finishing render applied with a stainless steel trowel gauging to the thickness of the aggregate size and finished with a plastic float to the requisite pattern.  Apply Stolit MP or MP Natural in two coats and finish with a float and judicial use of a damp sponge.

Thickness and styles of renders varies between Stolit K- 1 / 1.5 / 2 / 3mm & Stolit MP/MP Natural - sponge.  Refer to SELECTIONS to choose required finishing render.  Refer to SELECTIONS for preferred finish.

3.46
STOLIT K FAÇADE PAINT

Apply one coat of StoColor Maxicryl matt facade paint tinted to the selected colour on Stolit K render.

Refer to SELECTIONS for preferred finish.

3.47
STOLIT MP SEALER COAT

Apply one coat S-Protect SC stay clean sealer on MP finishes.

Refer to SELECTIONS for preferred finish.

Completion
3.48
ROUTINE CLEANING

Regularly remove debris, unused materials and other elements from the site relating to the plaster system application.  Replace damaged or marked elements leaving the whole of this work to the required standard.

Use this standard generic clause and add additional specific requirements.

ESD note:  Re-cycling is addressed in the general section 1256 WASTE MANAGEMENT; amend this clause if it is to apply to this section.

3.49
FINAL INSPECTION

A final inspection by the Sto Contractor and Contract Administrator of the entire finished Sto Poren panel system to take place immediately after completion of the work and any defects or subsequent damage made good immediately.

4
SELECTIONS

For further details on selections go to www.sto.co.nz

Substitutions are not permitted to the following, unless stated otherwise.

If substitutions are permitted modify the statement above, ensure the NO SUBSTITUTIONS clause from GENERAL is treated the same.

 

Select the options to suit the project and delete options not specified.

Materials
4.1
STO POREN PANELS

Location:

~

Supplier:

Stoanz Ltd

Brand:

Sto Poren Panels

Size/thickness:

2200mm x 600mm x 50mm thick

Waterproofing system
4.2
STOFLEXYL WATERPROOFING PLASTER

Location:

~

Supplier:

Stoanz Ltd

Product:

StoFlexyl waterproofing

Plaster systems
4.3
STOPOREN PLASTER SYSTEM - STANDARD SPEC SS500

Location:

~

Supplier:

Stoanz Ltd

Substrate:

~

Primer coat:

S Protect WS 205 silane sealer

Base Mesh Coat:

StoPoren 4mm-5mm meshed basecoat plaster

Sealer:

Stoplex W sealer

Aggregate render:

Stolit K ~ finished in one coat of StoColor Maxicryl façade paint

Sponge render:

Stolit MP ~ sealed with one coat of S-Protect stay clean sealer

Colour:

~

Options:

Substrate:

Panels to straighten

Finishing renders:

Select render type, size and colour:

 

Stolit K is a coloured finish render select 1 / 1.5 / 2 / 3mm (aggregate)

 

Stolit MP is fine plain coloured - MP Natural is sand specked sponge render

Paint or Sealer:

Select Sto Color Maxicryl for Stolit K or Protectosil SC sealer for Stolit MP

Colour:

Refer to Sto. A minimum light reflective value (LRV) 20% is recommended

4.4
STOARMAT MIRAL PLASTER SYSTEM - STANDARD SPEC SS501

Location:

~

Supplier:

Stoanz Ltd

Substrate:

~

Primer coat:

S-Protect WS 205 silane sealer

Levelling coat:

StoPoren 3mm-5mm basecoat plaster

Mesh coat:

StoArmat meshed reinforcement plaster

Aggregate render:

Stolit K ~ finished in one coat of StoColor Maxicryl façade paint

Sponge render:

Stolit MP ~ sealed with one coat of S-Protect stay clean sealer

Smooth render:

Stolit Milano finished in one coat of StoColor Maxicryl façade paint

 

or StoPur WV 200 transparent

Coats:

One

Colour:

~

Options:

Substrate:

Panels to straighten

Finishing renders:

Select render type, size and colour:

 

Stolit K is a coloured finish render select 1 / 1.5 / 2 / 3mm (aggregate)

 

Stolit MP is fine plain coloured - MP Natural is sand specked sponge render

Paint or Sealer:

Select Sto Color Maxicryl for Stolit K or Protectosil SC sealer for Stolit MP

Colour:

Refer to Sto. A minimum light reflective value (LRV) 20% is recommended