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Premium Quality Roofing, Cladding and Spouting Products

Designed & Tested for the New Zealand Environment

Calder Stewart Roofing is a leading supplier of premium grade roofing, cladding and spouting materials and products, designed and tested for New Zealand settings and environments. Our roofing products have been installed in prominent landmark buildings in New Zealand, including Wellington’s Te Papa Museum, The Invercargill Velodrome and Auckland’s Sky City Convention Centre.

Calder Stewart Roofing’s commitment to supply market-leading products for the roofing industry has driven us to develop innovative roofing systems for architectural and commercial applications. 

Our reputation for quality and innovation continues to be recognised among those looking for the best roofing products and materials available in New Zealand. 

Looking For Technical Documents?

home doc

Calder Stewart Roofing has an extensive portfolio of technical documents Including product CAD files, compatibility tables and material guidelines. This ensures researching & specifying the correct roofing system is a simple process.  


Our Products

Roofing and Cladding

Our high performance profiles, designed specifically for New Zealand settings, are the result of years of ongoing product development.

Fascia Products

Both Paltec Fascia and F180 offer distinctive metallic alternatives to conventional wood treatments.


Flashing solutions supporting our product line.

Spouting Products

A select product group designed to complement Calder Stewart profiles.

Rainwater Heads

Standard & Custom Designed.

Curved Roofing

Crimp Curving
Bull Nosing


Zig Zag Zoo


EPL Building - EuroTray™


Latest News

Two iconic roofing brands coming together

Two of New Zealand’s leading roofing companies, Calder Stewart Roofing and Dimond Industries will come together under the new name of DIMOND ROOFING.

We have created the new brand to represent the best parts of two iconic roll-forming brands that have existed in New Zealand for many years. Dimond Roofing is now the largest roll-former of long run roofing material in New Zealand, with sites from Invercargill to Whangarei.

Whitebait Shacks and Solar Power

Calder Stewart have recently being involved I n an exciting renovation of a traditional whitebait & fishing hut, there is a lot more to the story than meets the eye and we have been filming the project to give you a small insight into this and how our innovative products can be used.

Calder Stewart Roofing has Returned to Masterspec

Masterspec is New Zealand’s leading specification tool designed to ensure Architects & Designers alike can put together a comprehensive architectural product specification.


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