ROCKCOTE MicroStone Finishes - MicroStone over Fibre Cement Sheet (Households)
General
Description of Works/Specification Notes
ROCKCOTE MicroStone creates a natural stone fi nish that exudes elegance across a multitude of spaces. MicroStone can be applied over a range of substrates and surfaces for a bespoke seamless finish. MicroStone is a two-part water-based product;
Properties
- Coverage Rate: 12-14m2/15Ltr @ 1mm build per coat
- Substrates: Plasterboard, Concrete Block, Fibre Cement Sheet
- Abrasive strength: Excellent
- Colour: Available in light base and can be tinted using liquid tints (max. 3%).
- Packaging: Part A 10L : Part B 5L
- Clean up: Water
- Thinning: Add up to 1.5% of clean water to assist with consistency for ease of application or 300ml / per kit.r
- Use by: 6 months from date of manufacture
- Storage: Cool, dry place
- Application Temperature: + 5 °C to + 35 °C
- Usual No Coats: 1-2. Do not apply greater than 2mm per coat, use multiple coats for higher build.
- Drying Time: 2-4 hours
- Touch Dry: 1 hour
- Dry to Recoat: Dry to recoat 24 hours prior to Sealer application
- Curing Time: No water or condensation should contact the coating for 5 days from February 2025 Pg 3 of 5
- Installation. It is important to have adequate airfl ow between coats, especially in humid environments, including wet areas.
- Dry Film Build: 1mm
- Wet Film Build: 1-2mm
- Walkable Hardness: 24 hours
- Fire Group Classifi cation: 1-S (Test in accordance with ISO 5660:2002)
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
C – Protection from Fire
This specification complies with the requirements as set out in C – This clause provides objectives that apply to clauses C2 to C6 to: (a) safeguard people from an unacceptable risk of injury or illness caused by fire, (b) protect other property from damage caused by fire, and (c) facilitate firefighting and rescue operations.
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 – 5 Years Materials only
Execution: by Registered Plasterer – 5 Years Workmanship only
Components Used
Mesh – Blue (1200mm wide)
- Alkali Resistant 6mm x 5mm Weave mesh supplied in 50m rolls
Mono Render
- Supplied in 20kg Bags
Coarse Mesh Render
- Supplied in 20kg Bags
Mesh – Sticky (150mm Wide)
- Soft Mesh 150mm Wide supplied in 50m rolls
MultiStop Bedding Compound
- Polymer-modified, cement based dry plaster mix. Supplied in 20kg bags.
Resene Aqua Clear Natural (Flat)
Resene Aquaclear has been developed as a waterborne alternative to turps thinned oil modified urethanes.
Microstone
Rockcote MicroStone creates a natural stone finish that exudes elegance across a multitude of spaces. MicroStone can be applied over a range of substrates and surfaces for a bespoke seamless finish.
MicroStone is a two-part water-based product; Part A 10L and Part B 5L. Exemplifying excellence, this product exhibits minimal shrinkage and ensuring a flawless result every time. Discover the true essence of luxury with Rockcote MicroStone.
AAC Adhesive
- Polymer-modified, cement based dry plaster mix. Supplied in 20kg bags.
Installation/Application
Rockcote Mono5 Base Coat
Surface Preparation
Ensure surface is clean, sound, dry and free from dust, dirt, grease, mould and lichen.
Application
Plaster can be applied with a steel trowel, pump or broad-knife at approximately 3-5mm thick (3m2 per bag). Apply with firm pressure lay in mesh and trowel well to embed mesh (for base coat only). 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.
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.
Check and Prepare Fibre Cement Sheet Substrates
Preparation based on new substrate installations.
Preliminary Checks
Fibre cement sheet – please refer to substrate manufacturer installation instructions.
Vermin proofing track (supplied and installed by the main contractor as per cement sheet manufacturer instructions). The vermin proofing track can be manufactured from uPVC, aluminium or stainless steel and must be punched with 3-5 mm holes or slots complying with NZBC Acceptable Solution E2/AS1, Paragraph 9.1.8.3 to provide ventilation openings of 1000 mm2 per lineal metre.
Other cement sheet flashings may be required as determined by the substrate supplier.
Builder Supplied Flashings
Make sure all builder-supplied flashings are in place. The architectural drawings provide a list of possible flashings.
RCS Flashing Installation
Refer to the flashings as outlined within the Resene Construction Systems Specification
Control/Expansion Joint Setouts
For more information about control joints refer to the technical note on the Resene Construction webpage at the following link https://reseneconstruction.co.nz/control-joints/
The main contractor/substrate installer is responsible for all control joints, which must comply with the substrate supplier’s specifications.
Clean Surface
When the substrate has been left for a period of time, dust and dirt may build up on the surface. This contamination must be removed prior to render application.
Masking
Before applying the render, masking must be applied to all joinery, pipes, roofs, and all areas likely to be marked by the render. Use drop cloths and ground covers to keep the working areas clean.
Colour selection
For more information about light reflectance values refer to the technical note on the Resene Construction webpage at the following link https://reseneconstruction.co.nz/light-reflectance-values/
Rebated fibre cement sheet
When coating rebated fibre cement sheet joints, rebated edges must occur on all opposing sheet joints.
Rockcote MultiStop Bedding and Mesh Bandage
Surface Preparation
Ensure surface is clean, sound, dry and free from dust, dirt, grease, mould and lichen.
Application
Rebated joints in the cladding sheets are filled using Rockcote MultiStop Bedding Compound which is reinforced with a Rockcote Jointing Tape embedding into the MultiStop Bedding Compound ensuring the joint is level with surrounding sheet plane before leaving to dry overnight.
Plaster can be applied with a steel trowel or broad-knife at approximately 2mm thick. 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.
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.
Plaster Systems Coarse Mesh Render – Base Coat
Surface Preparation
Ensure surface is clean, sound, dry and free from dust, dirt, grease, mould and lichen.
Application
Plaster can be applied with a steel trowel, pump or broad-knife at approximately 3-5mm thick (3m2 per bag). 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.
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.
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.
Plaster Systems AAC Adhesive Skim Coat
Surface Preparation
Ensure surface is clean, sound, dry and free from dust, dirt, grease, mould and lichen.
Application
Plaster can be applied with a steel trowel, pump or broad-knife at approximately 2-3mm thick (8m2 per bag). 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.
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.
Rockcote MicroStone (2 Coats)
Mixing
- Mixing ratio by Volume: Part A 66% / Part B 33%. Kit weight ratio Part A 15kg / Part B 5.5kg.
- Before using stir Part A (10L wet component) to aerate content,
- Slowly add Part B (5L dry component) into Part A pail while mixing. Mix Part A thoroughly and combine Part B until homogenous.
- Mix to a smooth, lump-free consistency.
- To allow for proper hydration, let the product stand for 10 minutes, then re-mix for 1-2 minutes to a smooth paste consistency.
- To adjust consistency, ROCKCOTE MicroStone can be thinned up to 1.5% or 300ml / kit using clean water.
- Mixed Pot Life 90 minutes. Discard after this time.
Application
- Ensure the surface is properly prepared and ready to receive the MicroStone coating system.
- Any prior plaster coatings must be cured for a minimum of 48 hours or less than 15% WME before overcoating with a slurry mix
- The slurry mix must be allowed to dry for 4 hours before applying ROCKCOTE MicroStone.
- Apply the first coat in a tight and thin manner. When touch dry the application of the second coat can be commenced.
- Once the second coat is touch dry, go over it with a steel trowel to tighten and compress the coating. This will help to smooth any inconsistencies.
- When working in small areas, increased airflow is recommended to assist drying.
- Drying times will be affected by cooler air and substrate temperatures.
Sanding
- Sanding will be required to remove any minor imperfections in the MicroStone finish. The degree of sanding and the grit coarseness will depend on the MicroStone finish chosen.
- A random orbital sander fitted with a dust extractor or vacuum pump is highly recommended for sanding ROCKCOTE MicroStone finishes.
- Sanding screens are recommended as they will give a better finish, and will not clog during use like sandpaper and will reduce the risk of scratching the finish.
- ROCKCOTE MicroStone can be sanded once the MicroStone finish has dried completely.
- The recommended coarseness of the sanding screens and sandpapers are: Smooth Finish – 240 grit, Textured Finish – 180 grit and Exposed Stone Finish – 120 grit.
- Light hand sanding is recommended for small and detailed areas only.
Resene Aquaclear (2 Coats)
Resene Aquaclear has been developed as a waterborne alternative to turps-thinned oil-modified urethanes. It will provide a harder-wearing finish to the interior plaster range of products.
Application typically over interior finishes
Diluted 50% with clean water.
2 coat application with #4 synthetic roller
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/
