GRC New Zealand Ltd

PO Box 21774, Henderson,
Auckland, NZ

09 836 ...

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At GRC New Zealand Ltd, we specialize in creating customised solutions using Glassfibre Reinforced Concrete (GRC) or also known as just Glass Reinforced Concrete. GRC New Zealand Ltd is a privately owned company, our management team remain personally involved in overseeing every project from concept to completion.

Founded over 14 years ago, GRC NZ has successfully completed a huge number of projects around New Zealand, from lightweight cladding panels for high rise commercial buildings, to intricate art installations in the urban landscape.
Located and producing locally in Henderson, Auckland, GRC could be the perfect solution for your next project.

GRC NZ welcomes visits from architects and designers by appointment.

GRC New Zealand Ltd can offer complete customised solutions for your project. Every job is different and requires specialised input. With extensive experience from small scale residential bench tops to large scale high-rise commercial cladding projects we can project manage the production of your project from concept to completetion.

During the pre-construction phase, GRC NZ can offer our expertise tailored to meet the requirements of your project. Once the design concept is established simple sketches to full constructions shop drawings and engineered design can be produced to meet the specifiers requirements.

We can make almost any mould that can be imagined! The possibilities are endless. Timber, fiberglass or flexible silicon or rubber moulds can all be made in house, customised to each project. We also have a number of standard moulds available for particular uses. Contact us for more information.

We can produce GRC components in either the traditional 'sprayed' method or the 'premix' method. We offer the full package of GRC component manufacture including all fixings and connections as required.

Our installation team has over 15 years installing residential and commercial GRC cladding projects. We can offer an installation service to install your project correctly and safely.


Glassfibre Reinforced Concrete is one of the most versatile building materials available to architects and engineers today. Glassfibre Reinforce Concrete (GRC or sometimes GFRC) is a composite material comprising a mixture of hydraulic cement, silica sand, alkali resistant (AR) glass fibres and water. The glass fibres in GRC effectively reinforce the mortar mix thereby improving its tensile strength and characteristics.

GRC was developed in the 1960's as a corrosion free alternative to traditional steel reinforced concrete. Initially manufactured as an exterior cladding material, GRC can be moulded into a wide variety of complex shapes, profiles and architectural components. GRC is ideally suited to the popular fast-track approach of using lightweight, prefabricated cladding panels for the exterior of modern buildings.

The main advantage of GRC panels over the corresponding precast concrete alternatives is the considerable saving in weight. This results in savings in the costs of transportation, handling and erection of panels. If this weight advantage is considered at the design stage, it should be possible to affect substantial environmental and economic savings in design of foundations and superstructures for both low and high rise building constructions.

Other notable advantages of GRC cladding are its durability, seismic capabilities, chemical resistance, non-combustibility and good sound/heat insulation properties.

The uses of Glassfibre Reinforced Concrete are almost endless and limited only by your imagination. GRC is incredibly versatile and the ability to be flexible in structure, profile and shape will suit any project from innovative, cutting edge designs and artworks to traditional cladding projects or historic restorations.

GRC is primarily used as an exterior façade or cladding material for both new construction and recladding or restoration of existing building facades. GRC cladding panels are generally manufactured by the 'Hand Spray' technique and the skin is bonded to a steel stud frame. The method can produce high-performance materials from which panels with extremely thin, lightweight sections are achievable.

Due to its extreme flexibility, GRC is also the perfect material to create highly detailed and ornate patterns and textures for interior and exterior panels or artworks that don't require backing frames. Architectural dressings for exterior wall, window, spandrel, cornice, column liners, fireplace surrounds and benchtops are also possible.

The low rate of shrinkage of GRC makes it an excellent choice for historic restoration projects. Moulds can be taken from existing building ornaments to recreate their original classical appearance.

GRC can be painted or coloured to almost any colour using a pigment oxide added to the mix at the time of casting.

The weathering characteristics of GRC are as good as any precast material. Unlike traditional reinforced cement, GRC uses alkali resistant (AR) glass fibres throughout the matrix to provide reinforcement so is not at risk of corrosion and does not require further maintenance.
The GRC can be enhance for greater protection and durability, with a wide range of specialised products available that offer additional resistance to impact, weather, graffiti and water.

Typically manufactured to a skin thickness of 12mm, GRC can be cast in thinner sections and can be up to 75% lighter than similar pieces of traditional precast concrete. The reduced weight of panels makes them easier and cheaper to handle with reduced transportation costs, Generally, more GRC panels can be shipped in a single load than traditional precast.

GRC is a high impact strength material with a strength-to-weight ratio superior to most other materials. The glass fibre has a tensile strength 3 to 4 times greater than the equivalent steel fibre. GRC has high compressive and tensile strengths. For more information about the properties of GRC. GRC panels reduce loadings on foundations and perimeter columns which can lead to significant savings in superstructure and foundations if designed in from concept.

GRC offers unrivalled creativity with the ability to accurately reproduce any small or large design, including historic ornaments, ornate patterns and complex shapes. The material can be finished in a wide variety of textures and colours, giving designers greater control over the surface detail and quality of finish.

GRC is generally cast in thin skin sections which consume less raw materials and energy during manufacture. Consequently, the reduced weight and thickness of GRC panels can provide significantly lower environmental impacts during transportation to site and during installation.

For typical building cladding panel construction, GRC castings are manufactured by spraying a series of layers of polymer-concrete material with glass fiber reinforcement in a female mould. An engineered steel frame is bonded to the casting, allowing the panels to be installed to a building's structural steel or concrete slab by either bolt fixing or welding.

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