The Pick n Pay Hyper building in Ottery, Cape Town, is a well known landmark to most Capetonians and a hive of activity seven days a week. The building is managed by Redefine Properties who recently

had the unenviable challenge of having to attend to the roof, which over the years had begun presenting more and more water ingress problems.

Redefine Properties and Pick n Pay had concerns regarding the risks associated with conventional roof replacement. They were particularly apprehensive when it came to public health and safety, the costly disruption to trade, inclement weather, and the potential for damage to property and stock that can occur when removing an existing roof covering.

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AshgridTM has Pick n Pay covered

When a prominent Pick n Pay Hyper building looked like it was going to need a complete roof replacement, the property management team had serious concerns about the process and sought a better option. The

Ashgrid over-roofing system provided an ideal solution.

JAN/FEB 2016

CASE STUDY: Pick n Pay Hypermarket, Ottery, Cape TownCLIENT: Redefine Properties LimitedPROJECT MANAGEMENT: Slabber Fick & Associates Quantity SurveyorsCONTRACTOR: Chartwell Roofing (Pty) Ltd (Cape) OVER-ROOFING SYSTEM: AshgridTM

Additionally, the original design of the roof itself posed further challenges. The original low-pitched design had incorporated a number of steps in the roof planes to accommodate the maximum transportable lengths of roof sheets that were available in the market at the time of construction. The majority of the roof leaks that were being experienced originated at those steps in the roof.

THE ASHGRID SOLUTIONThe Ashgrid spacer system with its variety of bracket heights provided the ideal solution to eliminate those steps whilst accommodating site-rolled, long span concealed fix roof sheets ideally suited to low-pitched roof designs.

The Ashgrid over-roofing system was selected over alternative untested systems due to its proven 15-year track record, comprehensive testing, engineered design, and wide range of bracket heights.

Three different heights of Ashgrid Systems were specified to eliminate the existing steps in the roof, namely 85mm, 135mm and 190mm. The existing roof covering and flashings were left in position, thereby providing an excellent work surface for the contractor, Chartwell Roofing. The Ashgrid bars and brackets were assembled on the roof prior to installation, as the unique patented ‘twist & lock’ technology of the system allowed for the brackets to be easily re-spaced along the bars to accommodate the profiles of the existing roof covering. The pre-assembled brackets and bars were then fixed to the existing steel purlins by means of 25mm self-drilling fasteners that were drilled through the pans of the existing roof sheets.

The new long span concealed fix roof sheets were roll-formed on site by Global Roofing Solutions and installed to the engineered Ashgrid bars by means of concealed fix clips and self-drilling fasteners.

OUTCOMEDespite the project having been undertaken during Cape Town’s ruthless winter, the entire refurbishment process was completed without any disruption to Pick n Pay’s busy trade, whilst exponentially improving health and safety aspects for both the contractor and the shoppers below.

Chris Ball, director of Chartwell Roofing Cape, commented, “The Ashgrid spacer system provided the perfect solution to what would have been a high-risk and challenging re-roofing project. The system was incredibly quick and easy to install, which allowed Chartwell Roofing to achieve a very tight, critical path programme in challenging weather conditions. Ash & Lacy South Africa’s onsite technical support and know-how proved invaluable on this prestigious and highly successful project.”

For more information, visit the Ash & Lacy South Africa website at www.ashandlacy.co.za.

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