Meshclad
FOR PLASTERING ON:
- POLYSTYRENE INSULATION BOARD
- POLYSTYRENE STRUCTURAL BLOCK
- POLYSTYRENE ON MASONRY
MESHCLAD is a Plastering System for application on Polystyrene Insulation Boards, installed over an approved drainage and ventilation cavity, and comprising cement-based breathable mineral plasters, alkali resistant fibre-glass mesh and assorted PVC flashings and trims.
The polystyrene sheets are mechanically fixed over a 20mm cavity, to timber or steel framing, or bonded directly onto Masonry surfaces. MESHCLAD is also ideal for the plastering and weatherproofing requirements of Structural Polystyrene Block.
MESHCLAD is a three-coat plaster system incorporating embedded fibreglass reinforcing mesh and selected finishing coats. The main plaster component is BONDCOAT plaster, which provides a tough, durable and crack resistant base coat when used in conjunction with fibreglass reinforcing mesh.
BUILDING REGULATIONS
When installed and maintained according to the details given in the Mineral Plaster Technologies Ltd Technical Manual, MESHCLAD will meet the provisions of the New Zealand Building Code as required by: Clause B1 Structure: B2 Durability: C3 Spread of Fire: E2 External Moisture: E3 Internal Moisture and H1 Energy Efficiency.
INSULATION BOARDS & FIXINGS
EPS Boards – 40 or 60 mm thick, Class H or Class S, supplied in sheets ranging from 2.4 m up to 3.6 m. Sheets are typically 1.2 m wide.
Cavity Battens are 20 mm thick x 50 mm wide, and are manufactured from heavy duty polystyrene.
On timber framing, fixings are hot dipped galvanized flat head nails, and on steel, corrosion class self-tapping screws. Both are used with the MPT 40 mm washer.
On Masonry, sheets are fixed with Hilti IDP insulation fasteners, or alternatively can be adhered with a glue coat of BONDCOAT plaster.
For over-cladding existing substrates on timber framing, fixing is provided with 100 mm hot dipped galvanized flat head nails, fitted with 40 mm diameter washers.
ADHESIVES AND SEALANTS
A polystyrene compatible adhesive is required for gluing PVC extrusions to the insulation board.
Only BRANZ Appraised sealants are to be used wherever sealant is required.
AIRSEALS
Airseals are to be installed into all joinery openings to minimize the risk of airflows carrying water into the opening cavity.
PVC FLASHINGS & ACCESSORIES
Sill and jamb flashings, corner and base mouldings, and cavity vent caps are manufactured and supplied by Mineral Plaster Technologies Ltd, and are proprietary items.
PLASTER AND FINISH COATS
All MPT plasters are factory mixed, and have high water vapour permeability. The coating system consists of 5 – 10 mm thickness of plaster applied to the EPS sheets which are 40 – 60 mm thick. The plaster is reinforced with fibreglass mesh and finished with a 100 % acrylic paint system. The plaster finish can be textured to give different appearances, such as sponge, float, adobe or scratch (medium or coarse).
1st COAT:
BONDCOAT is a factory mixed adhesive render and is suitable as a bonding and meshing coat on polystyrene.
BONDCOAT can also be used to fix polystyrene boards to all common, good bearing wall backgrounds or as a key-coat on pre-cast concrete or painted surfaces.
BONDCOAT is suitable for plastering machines or manual application.
On polystyrene, BONDCOAT is used as a mesh coat of approximately 2 – 3 mm thickness to provide a tough, durable, crack resistant base coat.
BONDCOAT is a non-acrylic plaster with high water-vapour permeability ( breathing activity ) containing only natural materials and additives.
2nd COAT:
SKIMCOAT is an all-purpose skim coat render primarily designed as a leveling coat and a preparation coat for subsequent finishing coats.
SKIMCOAT can be trowelled to a thickness of 1 – 5 mm, and is suitable for plastering machines or manual application.
3rd COAT FINISHES:
- All MPT plaster finishes are available standard for painting. To compliment the breathing activity of its plaster coats, MPT recommends the use of vapour permeable 100 % acrylic-based exterior house paints which are used over MESHCLAD plaster to give the desired finish colour to the exterior walls and to make the system weathertight. Minimum light reflectance is 40 %.
- ADOBECOAT is a fine sponge finish and is ideally suited where an adobe or undulating finish is required. It can be easily worked to any desired effect, from bold rustic and undulating textures to smooth sponge finishes.
- FLOATCOAT has been specifically formulated for finishing by plastic trowel or sponged with water. It can also be sprayed through a hopper gun to achieve a fine to medium textured finish.
- SPONGECOAT is a medium sponge finish which will maintain texture beneath several layers of paint.
- SCRATCHCOAT MEDIUM is a medium texture coat ( drag or random scratch ), and during setting the applied areas are worked with a polystyrene or hard plastic float.
- SCRATCHCOAT COARSE is a coarse texture coat (drag or random scratch ), and during setting the applied areas are worked with a polystyrene or hard plastic float.
- SPRAY TEXTURES. All of the above finish coats can be sprayed through a hopper gun or similar to produce varying grades of textures from fine to very coarse. Variations are produced by sand particle size, nozzle diameter and varying air volume.
BUILDING WIND ZONES
MESHCLAD is suitable for construction in all NZS 3604 defined Building Wind Zones, up to and including Very High.
If you would like to get a free quote either give us a call to talk to one of our professionals or email us With a brief description of your Project and we will get back to you as soon as possible. | 
