Rockcote Systems are proudly Christchurch Made. We Cantabrians are born with an inner strength and fortitude second to none. This places us all in good stead to re-build Our communities, and Our city that equals these provincial qualities.
The Team at Rockcote Systems wish everyone all the very best at this challenging time and to let you know that we are here and ready to assist you.

As a member of Buy NZ Made we have joined the Love Christchurch Made campaign to promote our business to the local community, as well as our National business partners.

The latest addition to the Rockcote Systems family of Construction solutions  is now available.

Modern architectural trends and requirements for comfort and durability place tremendous demands on building structures. Rockcote Integra AAC Flooring System offers the flexibility to meet these demands in a cost effective, and time efficient manner. The System incorporates 75mm lightweight masonry panels, double steel mesh reinforced with a tongue and groove connection to provide robust solution for interstorey flooring in residential and commercial buildings.

click here for further information

The ADNZ / Resene 2010 national Design Awards were held last weekend in Nelson.

We are pleased to announce that the Resene Supreme Award, and Residential Multi-unit Award winner was Will Tatton, Will Tatton Architecture, Mt Maunganui – Ocean Beach Road Townhouses, Tauranga.

Rockcote LiteRock ‘cavity plus’ Solid plaster system was chosen to compliment the copper and granite exterior surfaces. The plastering was completed by Copleys Solid Plastering, Tauranga.

Visit us at this years premier HomeShow event. We are located in Hall 1, stand number 113.

We will be available to discuss your new construction requirements or to simply discuss our premium plaster cladding solutions. Rockcote are also teaming up with Future Proof Building at this years show, so come visit us and we will stamp your voucher to assist you in entering the draw to win a versatile home.

Auckland Home Show. ASB Showgrounds, Epsom.
Wednesday 8th – Sunday 12th September 2010.

Rockcote Systems the latest Future-Proof Building (FPB) Partner means you can now incorporate Rockcote Plaster Cladding into your FutureProof project. FPB features and solutions are those that will improve your quality of life now and ensure your home maintains and improves its future value.  The FPB initiative acts as a badge of confidence for consumers and encourages building professionals to use innovative building practices and high-quality products. Rockcote Systems is proud to offer our clients FPB solutions.


SpecAlert is a very simple and extremely quick method for the specifier to alert the building product supplier that their product has been specified on a project and who the next contact is, especially important if the specifier will no longer be involved in the project.

SpecAlert is a direct link between the specifier and the building product supplier with no other entity involved. The web based SpecAlert form can be filled in and sent by the specifier in under 1 minute.

If you are a specifier click here to find out more

Rockcote has released the latest additions to their Mineral Texture’s range. The two new finishes have been designed to provide both fine and coarse finishes that will suit all designs.

FastFloat fine sponge – is considered the best fine sponge plaster on the market today. It accurately emulates the traditional solid plaster ‘fines’ finish.

FastFloat Tasman – Hand applied and floated flat, this finish provides a subtle grainy texture that is smooth to touch with 1-2mm aggregate grains providing a negative relief.

All Rockcote FastFloat finishes are applied & finished by hand. They combine highly durable acrylic binders providing a breathable, uniform finish for any structure.

The latest Rockcote solution released into the market has received the final tick of approval from BRANZ. The system incorporates a primary and secondary means of weather resistance (first and second line of defence) against water penetration by separating the cladding from the external wall framing with a nominal 20 mm drained cavity.

The Rockcote Integra System has passed the stringent E2/VM1 weathertightness testing, and now includes ULS windzones up to 2.5kpa.

This system also includes the latest technical flashing developments from Rockcote. BRANZ – The BRANZ appraisal # 681.

For further information on this and more Rockcote Systems check out the following links;

Integra Lightweight Concrete Facade System

Some weathertightness problems can occur in painted, single-skin concrete masonry buildings. So, what should designers and builders look for when designing and building waterproof concrete masonry to help ensure weathertightness?

A good place to start is remembering that a concrete masonry wall, by itself, is porous. The permeability varies depending on what the units are made of – for example lightweight pumice aggregate is especially porous.

Care needs to be taken with masonry because secondary drainage and drying principles, including drainage cavities that apply to framed buildings, aren’t present in concrete masonry. Concrete masonry may be more naturally durable than timber, but the main ‘tools in the armoury’ for keeping water out of a masonry wall are good building design and effective surface coatings.

Building design that addresses the nature of materials and the environment they are used in can significantly improve the odds against leaking, as will careful detailing, such as around windows and doors. The principle of drainage cavities around windows and doors does apply, but the final back-stop is effective masonry sealing, especially in reveals of openings before joinery units are installed.

The mortar joints between concrete masonry units pose a particular weathertightness problem. As new mortar dries and shrinks, cracks develop between the mortar and the masonry units. Correct tooling of the mortar, which re-compacts the mortar after the masonry unit is laid, helps reduce the risk of cracking. This, plus a coating system that is correctly selected, applied and maintained, is especially important for ensuring weathertightness.

Therefore, the most effective means of weatherproofing concrete masonry will include combinations of:

  • 1. building designs that deflect water away from the masonry, such as with eaves overhangs, upper floor overhangs, and rainscreens
  • 2. details that deflect water away from critical joints, for example, flashings, drip edges and mouldings
  • 3. good masonry design specification and construction
  • 4. coating systems specifically formulated and applied to seal the surfaces of the masonry.
Building design

Buildings with good eaves all around will naturally be at less risk of leaking. Two principal ‘drivers’ for leaks are wind pressure and gravity. Reduce the water ‘on top of a wall’ through the use of eaves, and many leaks caused by gravity are eliminated. Reduce the amount of water running over the face of a wall or joint, and wind pressure can draw less water into the joint.

Horizontal surfaces, such as sills and horizontal ledges, should always be sloped to shed water, and drip edges should be formed at all overhang projections such as along window heads. One particular problem is that tooled concave mortar joints can often provide water pathways past a joint. The use of sealants can have a limited (and short-term) effect, with the best solutions coming from flashings set into sealant in a rebated saw-cut.

Buildings with parapets (and associated box gutters) are more at risk of leaking because weather-tightness is more reliant on getting everything ‘right’ and it staying ‘right’. They lack any of the ‘forgiving’ qualities that designs that shed water more easily provide.


The concrete masonry units, mortar, grout-mix, and workmanship are outlined in NZS 4210, Masonry Construction: Materials and Workmanship and NZS 4229 Concrete Masonry Buildings Not Requiring Specific Engineering Design. Following these Standards can provide a means of compliance with aspects of the Building Code and are a good prerequisite for effective weathertightness results. The quality of materials and work-manship, including recommendations such as filling all block cells, correct vibration, and using correctly formulated grout mix, will ensure greater stability of the wall on which the performance of water-resistant coatings depends.

Water-resistant coatings

It is important to choose a proprietary coating system designed for sealing concrete and concrete masonry. It is recommended that waterproof coatings applied directly onto concrete masonry are water-borne dispersion coatings giving 180 – 250 micron dry film thickness. Coatings can also be in the form of coated cement or polymer-modified cement plaster, insulation material over-coated with polymer modified cement plaster, or applied waterproof membranes. Clear coatings are not generally recommended because of difficulties in achieving lasting weatherproofing performance.

An often-overlooked requirement is the sealing of hidden surfaces, such as reveals of windows and doors, or hidden wall surfaces immediately above eaves lines. While these surfaces may not be directly exposed, sealing them is important for the effectiveness of the waterproof joint. The sealing may only need to be the first one or two coatings of the coating system, depending on the coating manufacturer’s recommendation.

The weatherproofing of concrete masonry is important for complying with Building Code Clause E2 External Moisture, which deals with the weathertightness of buildings. The Standards NZS 4229 and 4210 give guidance on how to achieve this. In addition, readers are referred to two other significant publications that deal specifically with the weathertightness of masonry. These are:

  • Concrete Masonry – a guide to Weathertight construction, available free of charge from the New Zealand Concrete Masonry Association at
  • Weathertight Solutions – Volume 4, available through BRANZ at
  • article courtesy of DBH – CodeWords April 2010
  • For information on Rockcote Systems Masonry Solutions click here

Keeping up with changes to specification requirements is key to maintaining the most accurate information for construction projects.

We have been working closely with ProductSpec and are pleased to introduce our latest BIM revit content. click on the link to view the Revit introduction and find  out more about this new service.