General

Building Code Compliance

If the project has a building consent then the following clauses apply.

B2 – Durability

This specification complies with the requirements as set out in B2 – Durability which must always be considered when demonstrating compliance with each of the clauses of the Building Code. It ensures that a building throughout its life will continue to satisfy the performance of the Building Code. It confirms the use of materials that will remain functional throughout the specified intended life of the building, but not less than 50, 15 or 5 years

This system meets the expected durability of the NZBC of at least 5 years

F2 – Hazardous building materials

This specification complies with the requirements as set out in F2 – Hazardous building materials which safeguards people from illness and injury from quantities of gas, liquid, radiation and solid particles caused by exposure to building materials

On Going Maintenance Instructions

Provide ongoing maintenance instructions required to meet the performance requirements of the NZBC.

Building Consent Authority Requirements

All the appropriate inspections are to be carried out by a BCA representative and that it complies with the NZBC requirements.

Documents

Abbreviations

The following abbreviations are used throughout this work section:

• BCA – Building Consent Authority
• LBP – Licensed Building Practitioner
• PPCS – Proprietary Plaster Clading System
• MPNZA – Master Painters of New Zealand Association
• MSDS – Material Safety Data Sheet
• NZBC – New Zealand Building Code

Manufacturers Documents

Copies of the above relevant company documents referred to in this specification are available at;

Resene Construction Systems
Web: reseneconstruction.co.nz
Telephone: 0800 50 70 40

No Substitutions

Substitutions are not permitted to any specified Resene Construction Systems system. Materials and execution to Resene Construction Systems specification except where varied by this specification and supported by architectural detailing.

Documentation

Finish Sample

Submit one 300 mm x 300 mm sample of the selected texture finish and colour for approval on request by the main contractor or specifier. Obtain signature of acceptance on sample and return to the Registered Plasterer.

Maintenance Instructions

Provide Resene Construction Systems Maintenance Guide on or before practical completion of the contract for issuing to the building owner. Resene Construction Systems Maintenance Guide to be provided on request.

Health and Safety

Refer to the requirements of the Health and Safety in Employment 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 Painters hazard handbook. Supply protective clothing and equipment. Inform employees and others on site of the hazards and put into place procedures for dealing with emergencies. Obtain from Resene Construction Systems the Material Safety Data Sheets for each product. Keep sheets on site and comply with the required safety procedures. Confirmation at the start of the project as to whether a Site Specific Safety Plan is to be produced by the Registered Plasterer prior to works starting.

Warranty

Warrant this system under normal environmental and use conditions against failure. Resene Construction Systems system warranty.
Materials: by Resene Construction Systems – 15 Years Materials only

Execution: by Registered Plasterer – 5 Years Workmanship only

Components Used

Quick Render

• Polymer-modified cement-based dry plaster mix. Supplied in 20 kg bags

Mesh – Blue (1200mm wide)

• Alkali Resistant 6mm x 5mm Weave mesh supplied in 50m rolls

MultiStop Bedding Compound

• Polymer-modified, cement based dry plaster mix. Supplied in 15kg bags.

Acrylbond Resin

• Multi-purpose Resin supplied in 5kg and 20kg containers

Marblestone AquaWax

• Supplied in 1kg pails
• Used to repell water from the Milano surface

Installation/Application

Check and Prepare Existing Unpainted Masonry / Brick / Stone

2.17.1. Preliminary Checks

Check all exposed surfaces of the substrate are straight, plumb and undamaged. Any loose substrate material identified must be removed and replaced.

Existing landscaping must be protected and / or removed in consultation with the project owner to allow accurate cladding installation in accordance with Rockcote technical details.

Fixing of a new exterior cladding can only be achieved if a) the existing brick/stone cladding is being removed / or b) if the substrate is solid filled masonry block.

Check with your local BCA as a consent and inspections may be required.

2.17.2. Wall Alignment

Using a straight edge, check joints are smooth and that the wall is flat and true. The Rockcote system installation is not designed to straighten deviations which exceed the specified Rockcote Render System thickness.

2.17.3. Weep Holes

Weep holes must be kept clear of Render unless an alternative solution is accepted by the BCA.

2.17.4. Existing Services / structure

General

All services must be back-flashed against the building wrap or against the existing weatherboards if they are remaining in place.

Plumbing

Plumbing services may need to be extend beyond the 'new' outside cladding line.

Electical

Electrical services may need to be extend beyond the 'new' outside cladding line. Electrical wiring must be wrapped with conduit.

Roofing

Face fixed fascia, roof and apron flashings may need to be extended / replaced to allow for extra cladding thickness. All external spouting must be removed prior to cladding installation.

2.17.5. Clean Surface

If you are applying the Rockcote system directly over exisiting substrate all dust, dirt and other contaminants must be removed prior to render applications.

Remove all moss and mould

Thoroughly clean down to remove all loosely adhered material. Treat areas of moss or mould infestation with Resene Moss & Mould Killer correctly diluted with clean water. Leave for up to 48 hours to achieve full kill. For heavy infestations further applications may be needed. Wash thoroughly with clean water to remove residues. For difficult areas carefully waterblast at 3000 psi to remove all dirt, chalk, moss and mould residue and any other contaminants. Allow the surface to dry out for at least 24 hours.

Remove powdery layers and efflorescence.

Remove any powdery layers, laitance or efflorescence by vigorous wire brushing or preferably waterblasting. Thoroughly degrease by scrubbing or brushing down with Resene Roof Wash and Paint Cleaner to remove all dirt, dust, grease, chalk, cobwebs and other contaminants. Rinse clean with copious amounts of clean water and test surface is degreased by wiping with clean cotton wool. Repeat process if necessary.

2.17.6. Improve adhesion

If you are applying the Rockcote system directly to the existing substrate the wall must be wetted down, or apply a solution of Rockcote Acrylbond and Water – ratio1 part Acrylbond : 4 parts water to minimise the suction of the substrate.

Allows the render to maintain moisture content for longer, providing greater working time. This process assists with the initial hydration / curing of the render application.

2.17.7.Colour selection

For further information on Light Reflectance Values (LRV) refer to TradeSpec™ Document 1.6 – Light Reflectance Values

Rockcote PM100 Quick Render Base Coat

Surface Preparation

Ensure surface is clean, sound, dry and free from dust, dirt, grease, mould and lichen.

Application

Mix a solution of Acrylbond and Rockcote MultiStop together and apply using a roller .

Curing:

Render should be protected from hot drying winds and direct sunlight for the first 6 hours..

Resene Construction Systems Mesh (Standard Weave)

General

Measured and cut slightly longer than the height/length of the area to be covered.

Application of Fibreglass Mesh

Apply the pre-measured mesh from the top of the wall.

Press the fibreglass mesh into the render mix with a steel trowel starting at the centre and working outwards towards the sides, so that it is completely embedded with the render mix forced right through the mesh holes.

Ensure there are no wrinkles or trapped bubbles in the mesh and that it is fully embedded just below the surface of the render.

Do not embed the leading edge of mesh as this locates your next mesh layer.

Mesh must not be exposed but retained as close to the surface as possible.

Overlap mesh 100 mm with the adjacent drop of mesh, and trowel to embed together.

Ensure the fibreglass mesh covers all exposed areas of the substrate, including any recesses around the exterior joinery and internal corners.

Fibreglass Mesh must be bought to the outside edge of all Flashings.

Apply 450 x 150 mm strips of fibreglass mesh `butterflies’ diagonally at every corner of openings for window and door joinery, meter boxes etc.

After the render mix has cured, trim off excess length accurately against the flashing edge.

Rockcote MultiStop Bedding Skim Coat

Surface Preparation

Ensure surface is clean, sound, dry and free from dust, dirt, grease, mould and lichen.

Mixing

Rockcote MultiStop is added to clean potable water whilst being stirred with a powered mechanical mixer until a trowel-able consistency is achieved. The mix is left to stand for 2 minutes and re-mixed, this will ensure all dry powder components are fully saturated and ready for application. Only mix as much product as can be reasonably used within 30mins. Once the product has started to set it must not be re-tempered. Dispose of setting material. Always wear a dust mask when mixing and handling this product.

Application

Plaster is applied not greater than 1mm with a steel trowel to a flat finish. A range of finishes can be achieved using sponges or steel trowels. Apply plaster only when the temperature is between 5°C and 30°C and will be in that range for the 24 hours period following application. MultiStop can be sanded to remove any dags or minor imperfections from the trowelling.

Curing:

Render should be protected from hot drying winds and direct sunlight for the first 16 hours. Protect newly applied plaster from rain and water run off for the first 24 hours.

Resin/MultiStop Slurry Coat

Surface Preparation

Ensure surface is clean, sound, dry and free from dust, dirt, grease, mould and lichen.

Application

Mix a solution of Acrylbond and Rockcote MultiStop together and apply using a roller or brush. A high solids roller can also be used to ensure the solution is evenly distributed across the wall surface.

For pourous substrates (eg. brick, concrete) mix a 50:50 4L mix of Acrylbond/water and a 1 kg of MultiStop/AAC Adhesive/Hydroplast to the mix.

For other surfaces (including painted) ensure a 4 Litre of Acrylbond is mixed directly with 1 kg of MultiStop/AAC Adhesive/Hydroplast.

If you are unsure of the surface you are applying the slurry to, apply to a small section of wall and test for adhesion.

Milano Marblestone BaseCoat

The product is ready to-use and it is thixotropic: mix it gently until it is workable. Should there be a liquid surface layer present, this will not affect the quality of MARBLESTONE. Apply MARBLESTONE using a metal trowel, waiting 24 hours before applying the second coat.

Milano Marblestone (2 Coats)

Apply the second coat with a steel trowel once the material acquires firmness, smooth off with a stainless steel trowel. Allow at least 24 hours to elapse before apply MARBLESTONE PLAK.

Milano Plaq

Spread on using a stainless steel trowel and, once it starts to harden, press smooth repeatedly until the surface is perfectly compact and shiny. For a deeper and more uniform finish, spread on two layers of MARBLESTONE PLAq

Milano AquaWax

Important:

This specification must be read in conjunction with the Resene Construction Systems technical drawings.
No alteration to the Resene Construction Systems RenderSpec® is permitted.
All Technical Data Sheets are available at https://reseneconstruction.co.nz/technical-library/technical-data-sheets/
All Safety Data Sheets are available at https://reseneconstruction.co.nz/technical-library/safety-data-sheets/