Wilco Precast

Maintenance


Maintenance of Precast ConcreteDownload this information in a PDF file.

Precast Concrete is a durable and long lasting building product. If properly maintained it will stand the test of time.

The beauty of precast concrete with its variety of colours and textures, together with its versatility and function, is an integral component of the building envelope. By following a simple program of inspection and maintenance precast concrete can guarantee the designed service life of a building.

To ensure the continued performance of the wall system and to maintain the warranty, visual inspections should be carried out at regular intervals. It is recommended that these inspections be carried out annually.

Attention should be paid to the caulked joints, surface appearance and connections. Any signs of deterioration should be documented at once with a copy of the written report sent to the manufacturer. Any applicable defects reported within the warranty period shall be remedied by the manufacturer.

The owner is urged to maintain this annual inspection program past the warranty period in order to optimize the life of the structure.

Maintenance & Protection Recommendations

  1. After a building or structure is erected, it should be cleaned as required.

  2. Precast expands and contracts. Ensure the precast joints are properly sealed.

  3. The precast structure should be power-washed every four to six years (based on the effects of the environment such as acid rain) to maintain its original appearance.

  4. If pigment is used in the manufacture of the precast units, a non-acid cleaning treatment is recommended.

  5. Damaged (i.e. split or cracked) caulking should be replaced by:

    • Removing damaged caulking

    • Cleaning area with solvent to remove oil debris

    • Applying primer as required

    • Re-caulk with matching caulking as per manufacturer's instructions.

  6. Follow applicable by-laws regarding use of sandblasting or acid cleaning procedures.

  7. If using acid to clean surfaces, pretest a sample to ensure units will not be damaged by the treatment.

  8. Precautions should be taken to avoid damaging or staining precast units by:

    • Ensuring access equipment does not scratch or chip precast surfaces.

    • Ensuring window cleaning solution ("run-off") is cleaned from precast units to prevent staining.

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Bruce Pullman Park, Papakura

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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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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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