Liquefaction-proof basement waterproofing

Media release

15 November, 2013

Liquefaction-proof basement waterproofing

Sika’s cutting-edge waterproofing system, SikaProof A, is only 1.6mm thick but is strong enough to resist seismic movement and the effects of liquefaction.

The highly flexible polyolefin membrane is used to waterproof concrete basements and other below-ground concrete structures and is applied before the reinforcing steel is installed and the concrete poured.

SikaProof A is being used on many significant projects in Christchurch including the $32 million rebuild of the historic Isaac Theatre Royal.

Sika New Zealand General Manager Peter Withell says the Christchurch earthquakes revealed just how vulnerable traditional waterproofing systems can be when faced with violent ground movement or liquefaction.

“The key strengths of SikaProof A, apart from being fast and easy to install and long lasting, are its exceptional resistance to everything from aggressive ground water through to seismic movement and liquefaction.

It is fully bonded to the substrate and uses a unique grid seal technology with “mini watertight compartments” meaning even if the SikaProof A membrane is damaged the water is isolated, stopping it from seeping into other areas.

Mr Withell says it is typically used on commercial and industrial buildings, ranging from retail areas through to large scale projects such as stadiums and multi-storey developments, but it is also effective for waterproofing everything from retaining walls to tanks.

For more information on Sika visit www.sika.co.nz

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