4282SR
STO MASONRY PLASTER SYSTEMS
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 Stoanz Ltd Sto plaster rendering systems, applied by hand, or pump over:

 

Stoanz Ltd products must be installed by an approved applicator.

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

EPS

Expanded Polystyrene Sheet

EIFS

External Insulation and Finish System

ICF

Insulating Concrete Formwork

LRV

Light Reflectance Value

MPNZA

Master Painters New Zealand Association

Documents
1.3
DOCUMENTS

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

NZBC E2/AS1

External moisture

NZS 4210

Masonry construction: Materials and workmanship

AS/NZS 4858

Wet area membranes

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

 

Documents listed above and cited in the clauses that follow are part of this specification. However, this specification takes precedence in the event of it being at variance with the cited document.

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

RELATED DOCUMENTS

Refer to the following related documents when preparing this section:

AS 1366.3

Rigid cellular plastics sheets for thermal insulation - Rigid cellular polystyrene - Moulded (RC/PS - M)

AS 1366.4

Rigid cellular plastics sheets for thermal insulation - Rigid cellular polystyrene - Extruded (RC/PS - E)

AS/NZS 2311

Guide to the painting of buildings

NZBC B2/AS1

Durability

NZBC F2/AS1

Hazardous building materials

BRANZ BU 314

Removing paint coatings from houses

BRANZ BU 570

Ground clearances

1.4
MANUFACTURER/SUPPLIER DOCUMENTS

Manufacturer's and supplier's documents related to this section are:

Sto Product manual with specification and CAD details

Sto Technical data sheets

BRANZ Appraisal 515

StoArmat Miral Plaster Systems

BRANZ Test No. DC1182 Sto Flexyl waterproofing to AS/NZS 4858

BRANZ Test FH4008.1 heat release performance level A unrestricted

BRANZ appraised concrete block joinery rebate / Sto details to differential design ULS wind pressure of 2.5kPa

 

Materials and execution to Stoanz Ltd specification except where varied by this specification and supported by architectural detailing.

 

Copies of the above literature are available from:

Web:

www.sto.co.nz - Building with Sto

E-mail:

info@sto.co.nz - peter@sto.co.nz

Telephone:

0-4-801 7794

Fax:

0-4-384 9828

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

Use for listing all warranties relating to this section.  Supplier and manufacturer warranties are those that are freely offered by the supplier or manufacturer, similarly installers and applicators.  They are usually in their standard form and subject to their terms and conditions. Check the general section 1237 WARRANTIES for the date of commencement of warranties; which is normally practical completion of the contract, although not all suppliers, manufacturers, installers or applicators will agree to this.  Refer to the chosen conditions of contract as it may also contain information on warranties.

1.5
WARRANTY

Warrant this part of the work under normal environmental and use conditions against failure of materials and execution. The Sto Applicator must complete the Sto quality assurance compliance procedure form and applicator warranty. The StoArmat Miral & Sto Miral Plaster System is warranted as follows:

Materials:

15 years from date of practical completion

Execution:

5 years from date of practical completion

 

Refer to the general section for the required form of 1237WA WARRANTY AGREEMENT and details of when completed warranty must be submitted.

Requirements
1.6
QUALIFICATIONS

Use only applicators registered to apply the Sto plaster render systems.

1.7
NO SUBSTITUTIONS

Substitutions are not permitted to any specified Sto plaster render system.

1.8
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.

1.9
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 of StoanzLtd to inspect the work in progress and to take samples of their products from site if requested. Refer to Sto product manual

 The level of inspection will depend on the nature of the project and will range from full for large or complex projects, through to intermittent for straightforward work, to occasional for initially establishing the standards of execution.  Refer to AS/NZS 2311 Appendix C, Inspection and Testing, for more background.

1.10
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.

1.11
INFORMATION FOR OPERATION AND MAINTENANCE

Provide Sto Maintenance Schedule before practical completion of the contract for issuing to the building owner.

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

1.12
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 Stoanz Ltd the material safety data sheets for each product.  Keep sheets on site and comply with the required safety procedures.

1.13
PRODUCER STATEMENT

Provide the producer statement compiled by the licensed applicator in the form as required by the Building Consent Authority.

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 515 - StoArmat Miral Plaster Systems

Performance
1.15
PERFORMANCE

Accept responsibility for the structural and weather-tight performance of the exterior render application.

1.16
TESTS

Refer to BRANZ Test No. DC1182 Sto Flexyl waterproofing to AS/NZS 4858 for waterproof membranes.

Refer to BRANZ Test FH4008.1 Heat release test - performance level A over ICF Blocks.

Refer to BRANZ appraisal Heat release test - performance level A over masonry surfaces.

Refer to BRANZ appraised concrete block joinery rebate / Sto details to differential

design ULS wind pressure of 2.5kPa.

2
PRODUCTS

WARNING

Mutually exclusive clauses follow. Check your chosen cladding system and select accordingly.

Materials
2.1
LEVELLITE PLASTER

Lightweight mineral basecoat plaster in a bag.  The material contains mineral aggregates, water retention agents, adhesive compounds, EPS beads and other additives to form a solid levelling/straitening, basecoat plaster.

Use with StoArmat Miral plaster system on concrete block or concrete substrates.

Use with StoArmat Miral plaster system render brick.

Use with Sto Miral plaster system on render brick (non mesh system).

2.2
POREN PLASTER

Mineral basecoat plaster in a bag.  The material contains mineral aggregates, water retention agents, adhesive compounds, fibre and other additives to form a solid levelling/straitening, basecoat plaster.

Use with Sto Miral plaster system on render autoclaved aerated concrete.

2.3
MULTISCREED PLASTER

Mineral basecoat plaster in a bag.  The material contains mineral aggregates, water retention agents, adhesive compounds, fibre and other additives to form a solid levelling/straitening, basecoat plaster.

Use with StoArmat Miral plaster system on concrete reinforced ICF (EPS) block.

2.4
STO GLASS MESH

Alkali-resistant 165g/m² fibreglass mesh in 50 metre rolls.

2.5
STO STOPLEX W PRIMER OR PROTECTOSIL WS205 SEALER

Aqueous acrylate universal consolidating sealer with siloxane additive.

Use Stoplex W with render brick non mesh Sto Miral plaster system.

Use Protectosil WS 205 to seal AAC blocks, panels or bricks.

2.6
STO FLEXYL MESHED WATERPROOFING

Aqueous copolymer dispersion binder in a pail that when mixed with Portland cement forms a waterproofing plaster mortar that is applied with mesh.  The material contains a copolymer synthetic binder, mineral fillers, fibre and enhancement additives.

Has been tested by BRANZ to meet AS/NZS 4858 as a waterproof membrane on plaster.

2.7
STOARMAT MESHED REINFORCEMENT PLASTER.

Reinforcement plaster in a pail with a calibration grain. A white non cement flexible meshing plaster containing organic fillers and fibres bound in a polymer dispersion to form a malleable crack resistant intermediate plaster with excellent adhesion qualities.

Use with StoArmat Miral plaster system on concrete block & concrete substrates

Use with StoArmat Miral plaster system on brick veneer for a meshed system.

Use with StoArmat Miral plaster system on autoclaved aerated concrete.

Use with StoArmat Miral plaster system on ICF block.

2.8
STOLIT K / MP COLOURED FINISHING RENDERS

Six different coloured finishing renders (as selected) in a pail. Containing organic aggregates and fibres bound in a polymer dispersion with enhancement agents and colouring pigments.  Refer to SELECTIONS for texture and colour.

Stolit K 1, 1.5, 2, 3mm aggregates renders and Stolit MP / MP Natural are sponge renders.

Use with StoArmat Miral plaster system on concrete block & concrete substrates.

Use with StoArmat Miral plaster system on brick veneer.

Use with Sto Miral plaster system on brick veneer (non mesh system).

Use with StoArmat Miral plaster system on autoclaved aerated concrete.

Use with StoArmat Miral plaster system on ICF block.

2.9
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.

Select for coating Stolit K renders.

2.10
PROTECTOSIL SC EASY CLEAN

Clear, invisible Silane sealer for ease of cleaning and added protection against staining of coloured sponge finishes (Note: were a clear coating is required contact Stoanz Ltd).

Select for sealing Stolit MP or MP Natural renders.

2.11
STOPUR WV 200 TRANSPARENT

Matt, clear, two pack urethane coating, natural looking (no darkening) sealer with excellent resistance to weathering as a clear coating for honed (architectural) concrete blocks.

Select as a clear finish for coating architectural blocks (refer to Sto)

2.12
INTERIOR GYPSUM PLASTER

Gypsum whiteset plaster in a bag applied by pump for finishing interior masonry surfaces to a straight even plane.

Use Finishing Compound if level 4 smooth finish is required.

Gypsum can be left levelled or structured (adobe styled) and waxed for natural finish.

Accessories
2.13
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 masonry construction requirements.

2.14
STO FLASHINGS AND COMPONENTRY

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

2.15
STO CONTROL JOINTS

Sto uPVC 8mm or 12mm uPVC control joint.

2.16
ARCHITECTURAL SHAPES

Polystyrene shapes used to create decorative detailing, fixed using a suitable construction adhesive or glue plaster applied to the shape prior to placing over the mesh coat.

2.17
STO JOINT SEAL TAPE

An expanding polyurethane foam impregnated Inseal tape for weatherproofing joints.

Use on concrete masonry, ICF or rebated masonry substrates as a secondary joinery moisture seal system in conjunction with Sto Flexyl and sealants as per the Sto details evaluated by BRANZ.

2.18
SEALANT

BRANZ appraised modified silicone (MS) sealant.

3
EXECUTION
Conditions
3.1
DELIVERY

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

3.2
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.

3.3
PLASTERING CONDITIONS

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

Refer to Sto product manual.

3.4
PROTECT

Before application of plaster, apply masking film and tape to all joinery, pipes, roofs and all areas likely to be marked by the plaster.  Use drop cloths and ground covers to keep the working areas clean.  Clean off droppings onto finished work immediately.

3.5
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 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 pads and plugs have been fixed and flashings and other preparation are complete. Do not commence plastering until substrate is of the required standard by the Stoanz Ltd approved applicator. All defects in substrate must be rectified prior to application of plaster coatings commencing.

3.6
FLASHING AND DETAILING

Adhere to the StoanzLtd 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.

3.7
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.

3.8
CONFIRM LAYOUT

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

Application
3.9
CHECK SUBSTRATE

Ensure that constructed substrates and adjoining surfaces are, after the preparation called for in this section, of the required standard.  All mortar joints to be flush finished with all slurry and protrusions ground off by the brick / blocklayer.  Do not commence work until the substrate is of the required standard.

3.10
INSTALL UPVC FLASHINGS

Install all Sto uPVC flashings to joinery and terminations as required.  Glue into position with construction adhesive prior to plaster application commencing or install in mesh coat application.

3.11
IRREGULARITIES

Before commencing fill voids or damage in masonry surfaces with LevelLite plaster to reinstate substrate.  On EPS / ICF blocks rasp off any degraded poly surfaces and foam fill any gaps or holes and allow to set before rasping level.

3.12
PENETRATIONS

All penetrations such as waste pipes, electrical wiring in uPVC conduits and metal plumbing piping install with a minimum 5° downward slope, through the Sto plaster system, to be sealed using a double application of MS sealant.

3.13
CONTROL JOINTS

Provide control joints in the plaster system to coincide with control joints in the substrate and/or junctions between dissimilar materials or where shown on the drawings and to StoanzLtd requirements.  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 manufacturers 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.

3.14
ARCHITECTURAL PROFILES AND INTER STOREY JOINTS

Architectural profiles (normally pre-meshed poly mouldings) used to create detailing or cover or inter-storey joints (panel construction) are to be fixed 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.

3.15
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 see Sto CAD drawings and specifications.

3.16
FINISHING

Refer to SELECTIONS for finish and colour.

The choice of a lighter colour will reduce thermal affect, which can impact on interior temperatures, see SELECTIONS for recommended minimum LRV.

 

WARNING

Mutually exclusive clauses follow.  Check your chosen cladding system and select accordingly.

Sto Masonry Plaster Systems

Refer to Sto specification and technical data sheets for 3 different finishing systems:

 

StoArmat Miral plaster system

 

Sto Miral plaster system

 

Gypsum Interior Plaster

StoArmat Miral Plaster System for Concrete Blocks
3.17
SURFACE PREPARATION

Before the installation of door and window joinery waterproof the masonry recess/rebates with two coats of StoFlexyl correctly mixed with Portland cement.  The sill is required to be mesh reinforced from the bottom of the rebate out to the edge of the sill and turned up the jambs by 40mm.

Fitting of window and door joinery over Sto Flexyl with air seals, Sto joint seal tape and MS sealant is the responsibility of the window installer.

3.18
CONTROL JOINTS

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

3.19
BASECOAT PLASTER

Apply one levelling/straightening coat of LevelLite basecoatplaster by hawk and trowel or pump at an approximate thickness 8/10mm using screed guides and stainless steel corners as required.  Rule or screed the surface to achieve a level plane ensuring a minimum thickness of 5mm is achieved.

Use to straighten substrate and create level plane for mesh coat.

3.20
BALUSTRADE & PARAPET TOPS / HORIZONTAL LEDGES / FLOOR SLAB TRANSITIONS / FOUNDATION SPLASH ZONES

A minimum slope of 10° is required on all horizontal surfaces.  To LevelLite base coated surfaces apply Sto Flexyl / meshed waterproofing correctly mixed with Portland cement and extend 75mm up and down any adjacent vertical plaster surfaces.  Allow to dry and apply the StoArmat mesh coat.  Sto Flexyl waterproofing must attain a minimum thickness of 1.5mm to meet E2/AS1 and AS/NZS 4858.  For concrete foundation details Sto Flexyl is applied extending 200mm above ground to 100mm past the finished plaster system.

3.21
MESHED REINFORCEMENT PLASTER

To dry LevelLite surfaces apply StoArmat reinforcement plaster at approximate thickness of 1.5 / 2mm.  While plaster is still wet lightly embed Sto mesh ensuring adjacent drops of mesh are overlapped by a minimum of 75mm.  Float surface to ensure mesh is embedded onto the StoArmat coat, allow to dry then apply one further coat of StoArmat at approximately 1mm thick to leave the plane even surface free of voids or deviations.  Once dry remove any slight ridging with a Sto rasp.  Install Sto pre meshed uPVC drip edges and corner angles on concrete masonry joinery lintels and edges.

StoArmat is a crack resistant malleable non cement reinforcement plaster in a pail.

3.22
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.

3.23
PAINT OR SEALER COAT

Apply one coat of StoColor Maxicryl matt facade paint tinted to the selected colour, on Stolit K renders, or Protectosil SC easy clean sealer on MP finishes.

On EPS/ICF block the colour must have a light reflective value (LRV) of 25% or greater

Refer to SELECTIONS for preferred finish.

3.24
INTERIOR PLASTER SYSTEM

Apply Knauf MP 75L hardwall plaster at 8 - 10mm to achieve a level plane surface free of hollows or an off the trowel adobe finish.  Fit galvanized/stainless steel corner profiles set in plaster anchor dabs at corners, doors and other junctions as required, and mesh any stress points.  Polish plaster to finish required or alternatively an adobe sponge finish can be achieved by structuring the plaster to the selected finish.  If a level 4 finish is required apply Knauf Multifinish skimming plaster.  Seal with natural wax, clear seal, paint or apply selected finishing render.

The Knauf MP 75L hardwall gypsum plaster can be waxed, clear sealed painted or a Sto interior finishing system applied.  For tiling, level the surface with a minimum thickness of 7mm.

Refer to SELECTIONS for preferred finish.

StoMiral Meshed Plaster System over Render Brick or Garden Walls

Sto Miral Meshed plaster system.

StoArmat Miral plaster system is StoArmat mesh reinforced.

3.25
SURFACE PREPARATION AND PRE-TREATMENT OF BRICK VENEER

The render bricks are to be clean and free of all surface contaminates before plastering commences and shall be cured enough to accept the base/mesh coat plaster.  Any minor surface damage to be repaired with LevelLite.  All maximum tolerances to comply with NZS 4210 table 2.2.  All mortar joints to be flushed finished.

3.26
BASECOAT PLASTER

To clean dry and cured brick surface, apply one levelling/straightening coat of Sto LevelLite base plaster at the required thickness of 8 / 10mm using guides and corners as required.  Rule or screed the surface to achieve a level plane surface free of hollows and deviations and 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 encapsulated into the plaster.

Use to straighten substrate and create level plane

Use Sto mesh into the LevelLite basecoat plaster to reinforce the plaster.

3.27
BALUSTRADE & PARAPET TOPS

A minimum slope of 10° is required on all horizontal surfaces. To LevelLite basecoat plastered surfaces apply Sto Flexyl / meshed waterproofing correctly mixed with Portland cement extending 75mm up and down any adjacent vertical plaster surfaces.  Allow to dry and apply a StoArmat mesh coat.  Sto Flexyl waterproofing must attain a minimum thickness of 1.5mm to meet E2/AS1 and AS/NZS 4858.

For Sto Miral non meshed and Sto StoArmat Miral mesh reinforced plaster system.

3.28
SEALER FOR STO MIRAL PLASTER SYSTEM

To clean dry LevelLite surfaces apply one coat of Sto Stoplex W primer by brush and roller to seal the basecoat surface.

Only required for Sto Miral non meshed brick veneer plaster system.

3.29
MESHED REINFORCEMENT PLASTER

To dry prepared LevelLite surfaces apply one even coat of StoArmat reinforced plaster at approximate thickness 1.5 / 2mm.  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 encapsulated into the plaster.  Allow to dry and apply one further coat of StoArmat at approximate thickness of 1mm.  Once dry remove any slight ridging with a Sto rasp.

Select for StoArmat Miral meshed reinforcement on brick veneer.

3.30
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.  Note Stolit MP is only applied over StoArmat/mesh coat.

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.

3.31
PAINT OR SEALER COAT

Apply one coat of StoColor Maxicryl matt facade paint tinted to the selected colour on Stolit K renders, or Protectosil SC easy clean sealer on MP finishes.

Refer to SELECTIONS for preferred finish.

StoArmat Miral Plaster System over Autoclaved Aerated Concrete
3.32
SURFACE PREPARATION AND PRE-TREATMENT OF AUTOCLAVED AERATED CONCRETE BLOCKS, BRICKS AND 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.

3.33
PRIMER COAT

To clean dry AAC surfaces apply one coat of ProtectosilWS 205 sealer by brush and roller or garden sprayer to seal the surface.

3.34
CONTROL JOINTS

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

Refer to Manufacturer and Stoanz Ltd for specific project control joint details.

3.35
BASECOAT PLASTER

To clean sealed autoclaved aerated concrete surfaces, apply one levelling/straightening coat of Poren base plaster at the required thickness of 4 - 6mm using guides and corner angles as required.  Rule or screed the plastered surface to achieve a level plane surface free of hollows and deviations.

Use to level substrate and create straight plane to minimum thickness of 5.0mm.

3.36
BALUSTRADE AND PARAPET TOPS / BASE DETAIL

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

3.37
MESHED REINFORCEMENT PLASTER

To dry Poren surfaces apply one even coat of StoArmat reinforcement plaster at approximate thickness 1.5 / 2mm.  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 StoArmat at approximate thickness of 1mm.  Once dry remove any slight ridging with a Sto rasp.

3.38
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.

3.39
PAINT OR SEALER COAT

Apply one coat of StoColor Maxicryl matt facade paint tinted to the selected colour on Stolit K render, or Protectosil SC easy clean sealer on MP finishes.

Refer to SELECTIONS for preferred finish.

StoArmat Miral Plaster System over ICF (EPS) Blocks
3.40
SURFACE PREPARATION AND PRE-TREATMENT OF ICF (EPS) BLOCKS

Allow minimum 28 days for concrete infill to cure before application of plaster system.  All surfaces must be rasped to remove the surface skin and any UV light degraded ICF.  Before fixing window and door joinery to concrete formed reveals apply Sto Flexyl / mesh from the bottom of the reveal turning out onto the ICF block face.  Surface defects, voids and gaps in the ICF blocks to be stopped flush using Sto Adhesive Foam and rasped back once dry.

Main contractor to form 25mm concrete rebates in all joinery openings to ensure weathertightness.

Fitting of window and door joinery over Sto Flexyl with air seals, Sto seal tape and MS sealant is the responsibility of the window installer.

3.41
BALUSTRADE AND PARAPET TOPS / HORIZONTAL SURFACES / FOUNDATION

A minimum slope of 10° is required on all horizontal surfaces.  To base coated surfaces apply Sto Flexyl / meshed waterproofing correctly mixed with Portland cement extend 75mm up and down any adjacent vertical surfaces.    Allow to dry and apply StoArmat mesh coat.  Sto Flexyl waterproofing must attain a minimum thickness of 1.5mm to meet NZBC E2/AS1 and AS/NZS 4858.  For ground tanking Sto Flexyl / mesh must extend 100mm past the finished plaster system.

Note: Ensure the main contractor has provided a concrete plinth or waterproof detail in walls adjacent to paths, etc and that any concrete decks mask past the walls to protect / waterproof the ICF shell.

3.42
BASECOAT PLASTER

To clean dry and prepared block surface, apply one straightening coat of Muiltiscreed basecoat plaster at the required thickness 4 / 6mm using guides and corner angles as required.  Rule or screed the surface to achieve a level plane surface free of hollows and deviations.

3.43
MESHED REINFORCEMENT PLASTER

To dry LevelLite surfaces apply StoArmat reinforcement plaster at approximate thickness of 1.5 - 2mm.  While plaster is still wet lightly embed Sto mesh ensuring adjacent drops of mesh are overlapped by a minimum of 75mm.  Float surface to ensure mesh is embedded onto the StoArmat coat, allow to dry then apply one further coat of StoArmat at approximately 1mm thick.  Once dry remove any slight ridging with a Sto rasp.  Install Sto pre meshed uPVC drip edges and corner angles on concrete masonry joinery lintels and edges.

StoArmat is a crack resistant malleable non cement reinforcement plaster in a pail.

3.44
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.

3.45
PAINT OR SEALER COAT

Apply one coat of StoColor Maxicryl matt facade paint tinted to the selected colour on Stolit K render, or Protectosil SC easy clean sealer on MP finishes.

Refer to SELECTIONS for preferred finish.  Colour to have a light reflective value (LRV) of 25% or greater.

Completion
3.46
CLEANING

Remove debris, unused materials and elements from the site relating to plaster system application.  Replace damaged, cracked or marked elements.  Leave the whole of this work to the required standard.

3.47
FINAL INSPECTION

A final inspection by project assessor of the entire finished plaster system to take place immediately after completion of the application work and any defects or subsequent damage made good immediately.

4
SELECTIONS

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

4.1
STOARMAT MIRAL PLASTER SYSTEM SS202 OVER CONCRETE BLOCK

Location:

~

Substrate:

~

Levelling coat:

LevelLite basecoat plaster

Mesh coat:

StoArmat meshed reinforcement plaster

Finishing renders:

Stolit~

Paint:

~

Sealer:

~

Coats:

One

Colour:

~

Interior plaster:

~

Options:

Substrates:

Concrete block, In situ concrete construction

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

Interior plaster:

Knauf MP 75L Gypsum finished as required or render finish as selected

 

Knauf Multifinish if level 4 finish is required for painting

4.2
STOARMAT MESHED MIRAL PLASTER SYSTEM SS505 OVER RENDER BRICK

 

Location:

~

Substrate:

Brick veneer

Levelling coat:

LevelLite basecoat plaster

Mesh coat:

StoArmat meshed reinforcement plaster

Finishing render:

Stolit~

Paint:

~

Sealer:

~

Coats:

One

Colour:

~

Options:

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

 

Use Stolit K for non meshed plaster system

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

4.3
STOMIRAL NON-MESHED PLASTER SYSTEM SS500 OVER RENDER BRICK OR GARDEN/RETAINING WALLS

Location:

~

Substrate:

Garden/retaining walls

Levelling coat:

LevelLite basecoat plaster

Mesh coat:

StoMiral meshed reinforcement plaster

Primer coat:

Sto Stoplex W sealer (non mesh)

Finishing render:

~

Paint:

~

Sealer:

~

Coats:

One

Colour:

~

Options:

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

 

Use Stolit K for non meshed plaster system

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

DELETE one of the above systems and edit selection accordingly.

4.4
STOARMAT MIRAL PLASTER SYSTEM ON AUTOCLAVED AERATED CONCRETE

Location:

Autoclaved Aerated Concrete ~

Substrate:

~

Primer coat:

Protectosil WS 205 silane sealer

Levelling coat:

Poren 4-6mm basecoat plaster

Mesh coat:

StoArmat meshed reinforcement plaster

Finishing render:

Stolit~

Paint:

~

Sealer:

~

Coats:

One

Colour:

~

Options:

Substrate:

Blocks, Panels or Bricks 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

4.5
STOARMAT MIRAL PLASTER SYSTEM SS707 ON ICF BLOCK CONSTRUCTION

Location:

~

Substrate:

Reinforced ICF (poly) Block construction

Levelling coat:

Multiscreed 4-6mm basecoat plaster, to straighten blocks

Mesh coat:

StoArmat mesh reinforcement plaster

Finishing renders:

Stolit~

Paint:

~

Sealer:

~

Coats:

One

Colour:

~

Options:

~

ICF system:

Refer to brand name

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