The Right Stuff

Practical how-to articles for builders and designers showing good industry practice and interpretation of the NZ Building Code and standards.

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Good vibrations

1 August 2013, Build 137

One of the keys to good-quality cured concrete is correct vibration after it’s poured. This compacts it and consolidates the mix by removing trapped air. But how do you get it right?

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Formwork

By Des Molloy 1 October 2010, Build 120

Many builders have had a concrete and formwork failure that they would rather forget. It’s an area of construction where listening to the wisdom of experienced tradespeople is vital, but the following pointers may also help.

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Concrete slabs and control joints

1 August 2005, Build 89

Concrete shrinks as it sets and will continue to shrink for at least 12 months after placing, depending on drying conditions. About 50% of the shrinkage occurs within the first 4 months.

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At the junction

By Ann Galloway 1 August 2016, Build 155

Renovations or extensions can often mean a new slab is laid abutting an old one. There’s plenty to consider before starting work to ensure the junction is weathertight, strong and Building Code compliant.

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