Flowcrete championed for tolerant flooring projects

Performance flooring manufacturer, Flowcrete, has installed some 2,780m2 of it's proprietary screed system - K-Screed - at the New Zealand Government Archives Facility.

Performance flooring manufacturer, Flowcrete, has installed some 2,780m2 of it's proprietary screed system - K-Screed - at the New Zealand Government Archives Facility.

According to Barry McGee, Flowcrete, New Zealand, K-Screed was selected over other systems for several key reasons.

"The first is K-Screed's unparalleled proven track record. It has been used in high-profile airports, car parks, hospitals and public buildings around the world, primarily because it delivers performance benefits that are significantly greater than those offered by traditional concrete, and at a more favourable price than most self-levelling compounds."

The added strength and durability of K-Screed, achieved due to the reduced water content of the system, eliminates the cracking, curling and debonding that often occurs with sand/cement screeds. Curing times for K-Screed are favourable - as little as two to four hours - compared to seven days for sand/cement. Drying times are also significantly faster, with K-Screed requiring only 24 hours per 10mm thickness (depending on ambient temperature), while sand/cement can take up to 75 days (11 weeks).

Working in partnership with local company Firth Concrete, the semi-dry cementitious K-Screed was provided at the site ready-mixed, ensuring consistency and quality of product. It was installed at a thickness of 30mm to 35mm in the high level racking area of the facility.

It was finished to a level tolerance of 1mm in 3m, a surface finish that would have been difficult to achieve with normal concrete, according to McGee.

"Concrete is often specified to be finished to the finished floor level and to the level tolerances. This is often never achieved, and results in the concrete needing to be topped with a levelling compound in order to meet the desired level tolerances before applying the final floor finishes. This is an expensive and time-consuming exercise, all of which can be avoided by using K-Screed to the correct falls or tolerances," he said. "We like to think of it as our ‘Black Magic' system - that's the colour and that's how it performs."

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