ACA dispels precast myth

The Architectural Cladding Association (ACA) wants to dispel the myths surrounding precast concrete cladding.
"Producing an element in a factory will cost more than the same element built in traditional fashion by trades on site; and precast is no different. Appreciating the full extent of the work undertaken will go a long way to explaining the costs when comparing precast with other construction methods," said David Walker, chairman of the ACA.
"However, what also needs to be fully understood is, the added benefit of precast in terms of: programme savings and certainty; savings in preliminary costs such as scaffolding; earlier starts for following trades; early water tightness; higher quality and fewer defects; and less risk - all leading to earlier completion of the building. All too often, these aspects are not taken into consideration when comparing costs."
Common architectural criticisms are aesthetics and weathering properties of precast, particularly joints and staining. Both can be overcome by correct design detailing, the ACA claimed.
"The precaster's design resource should be involved as early as possible. Elevations can be panelised to ensure that joints are not prominent or obtrusive and details incorporated so that water flow over the face of the concrete does not cause staining.
"So often, the material is held responsible when it is bad detailing that is at fault," Walker said.