Wilco Precast

Why Precast


Why Architectural Precast?Download this information in a PDF file.

Architectural precast offers many cost advantages over other cladding materials. Precast is produced all year round in a controlled, cost-efficient production environment. In addition, precast can be installed year round even in harsh winter conditions. This eliminates the need for costly winter weather protection and contributes significantly to compressing the overall building schedule.

Architectural precast can enclose the project quicker than any other cladding material. Typically, more than 100 square metres can be installed each day (10 pieces per day at 10 square metres each). Precast's installation speed can shave months from a construction schedule, thus reducing construction financing cost. Architectural precast is the cladding material of choice whenever superior aesthetics or construction economy is required.

Precast cladding combines the benefits of high durability, low maintenance, excellent fire resistance and energy efficiency. All precast is factory manufactured ensuring consistent quality.

The versatility provided by architectural precast is appropriate for use on high-rise office buildings, where the emphasis is on prestige and aesthetic appeal; low-rise industrial structures, where economy and durability are paramount. The true benefit of architectural precast is found in the virtually limitless architectural effects that can be achieved with its use.

Custom made forms are used to create precast panels in the exact size and shape utilizing reveals, joint patterns and other architectural detailing specified by the designer.

Specific colour effects can be achieved by using oxides and exposed aggregates. Textures can be customized through the use of chemical retarders, acid washes and grit-blasting. Combinations of the above finishes can be realised within individual panels.
Precast wall panels are economical to produce, erect and maintain. Maximum precast panel sizes are determined by the ability to be able ship them to site. Early consultation with Wilco Precast will assure the most cost effective approach.

See TECHNICAL - Delivery Parameters

Architectural precast cladding when combined with a properly designed joint is an effective barrier for both the infiltration of air and rain, and the exfiltration of air and moisture. The concrete panel itself will not permit the passage of water by the forces that cause it (ie. momentum of the rain drop, capillary attraction, gravity and air pressure). Although concrete provides a completely impervious outer skin, it is essential that these same forces be controlled at joints between precast components and precast and other interfacing building materials such as windows, curtainwalls, masonry, etc.

Modified Rain Screen 

Modified rain screen assemblies have been successfully used for many years. The back face of the precast joints are caulked tight, developing the air/vapour barrier and the exterior joints are caulked but allow for the exchange of air through the introduction of weep holes and breather openings. The result is an air chamber within the precast joint, vented to the outside. With air chamber pressure equalization to the exterior pressure, there is no force to drive rain into the joint.

Any moisture entering the joint will cling to the joint walls and then be drained out by the transverse seal. Insulation is applied to the back surface of the precast, along with an air vapour barrier and the finished interior surface which then completes the wall assembly.

Summary

Modification of the panel profile, panel edges, knowledgeable use of panel connectors, proper joint widths, and the correct use/application of sealant materials are all essential for the proper performance of a modified rain screen joint system.

Please contact Wilco, joint sealant supplier and professional precast sealant applicator who have proven expertise in the above applications, for more specific details, or for information about fire rated joint assemblies.  

Wilco Precast News:



  • Preparations are already underway for Auckland’s 2018 Special Children’s Christmas Party on Saturday, 15 December, at the ASB Showgrounds. This event brings together over 2,000 sp.. read more »


  • Wilco sponsored Anita McLaren (nee Punt) during her 2016 Black Sticks Olympics campaign. Anita played her first match for New Zealand in June 2009 against India (https://en.wikipedia.org/wiki/Indi.. read more »

Another Wilco Precast project:

Bella Vista Apartments, Te Atatu

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Britomart Transport Centre

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Bruce Pullman Park, Papakura

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Carlaw Park Student Accommodation

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Ceres Building, Mt Wellington

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Cinema, Pukekohe

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City Gate, Hamilton

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Counties East Area Headquarters

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Diocesan School Centennial Building

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Having used precast concrete on numerous other commercial and industrial projects the architects elected to use precast concrete as the principal cladding for the Centennial development to be able to provide a building appropriate to the traditions and qualities of Diocesan School.

It was clear from previous work already completed at the school, also a precast concrete building (the junior school) and from other buildings on site, that Diocesan would not be receptive to a building outside the established style, or to using some of the lighter weight cladding systems currently on offer. By careful consideration of panel size, joint location and the use of both horizontal and vertical rebates a virtually seamless building has been provided.

The use of the precast elements has also enabled modelling of the façade, creating deep recesses to the windows and the doors, and to provide cornices, projections and other details which provide an interesting pattern of shadows during the day, as the building follows the curve of the tree line.

The precast decorative columns to the perimeter extended through two levels and weighed up to 12 tonne each. They were capped off with curved precast feature beams up to 1500mm in depth. As the beams and columns included three-dimensional architectural features the detailed design, construction and placing of these components was absolutely critical in order to achieve the architect's final details.

The success of this major stage of the project was attributable to the attention to detail achieved by Wilco Precast, the engineers, architects and the construction team at Argon in putting together a high quality precast concrete structure. This was a working site with little construction space, requiring a high level of tolerance by all parties and the result is a credit to all concerned.

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Foodtown, Takapuna

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Housing Corp, Mt Albert

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Ibis Hotel, Auckland Airport

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Illico Apartments, Stonefields

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KFC Auckland Airport

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Kingsbridge Apartments, Remuera

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Knox Street Car Park, Hamilton

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Manukau Elective Surgical Hospital

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Massey University Library, Albany

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Massey University Student Accommodation

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Merchant Quarter, New Lynn

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Metlifecare Poynton, Takapuna

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Mitre 10 Mega store, East Tamaki

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Motorway Noisewalls

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Litecrete noisewall barrier panels have many advantages over competing materials which can deteriorate, delaminate, lose strength, deflect and may not be able to withstand vehicular impacts. Installing Litecrete noisewall barrier panels is easy. Lifting eyes are set in the top edge of the panels during the casting process and once delivered to the construction site the panels are lifted up and slotted into the galvanised steel supports. Litecrete panels may be coloured by using integral colour pigments or by staining once the panels are installed. Textures or designs can be economically created on the traffic side or the residential side of the panels using rubber formliners.

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New World, Mt Maunganui

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NZI, Auckland

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Reformed Church, Pukekohe

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Saints Apartments, Auckland

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Selwyn Retirement Village

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Sentinel Apartments, North Shore

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Sky City Casino

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Sky City Grand Hotel Auckland City

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Summerset Village, Flat Bush

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Tauranga Police Station

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Te Whare Wananga o Awanuiarangi, Whakatane

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Trends Building, Ellerslie, Auckland

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van den Brink Building, Manukau

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Victoria Park Tunnel, Auckland

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Vodafone Building, Auckland City

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Westlake Girls High School

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Wiri Correctional Centre, Auckland

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