Our business

The Concrete Division includes businesses that span the concrete value chain, from raw material extraction through to product manufacturing.

The Division includes New Zealand’s only local manufacturer of cement, GBC Winstone, which has been part of the local community for over 100 years.

The Division includes 18 quarries, over 80 manufacturing plants and further service centres across the country.

Our Concrete businesses


Logo concrete Winstone Aggregates
Winstone Aggregates

Winstone Aggregates (WA) has over 150 years experience in manufacturing and supplying aggregates. It operates 18 quarries nationally. Winstone Aggregates also includes Winstone Transport, which offers bulk transportation solutions nationwide.

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Logo Concrete Golden Bay Cement
Golden Bay Cement

Golden Bay Cement (GBC) is over 100 years old and is NZ’s only manufacturer of cement. From the Portland manufacturing plant, GBC supplies a full suite of bagged and bulk cement products and operates seven service centres nationally.

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Building Products logo - Firth

Firth is New Zealand's leading national concrete company and only national masonry supplier. Firth’s products are used across all building sectors and environments.

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