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Granite® Impression gives new life to St Bartholomew’s church

Granite® Impression from ArcelorMittal Europe – Flat Products has been used to create the new roof of St Bartholomew’s fieldstone church in Troszyn (Poland). The organic coated steel was selected to replace the existing roof which had deteriorated significantly. ArcelorMittal’s Granite® Impression – Brown Agate was chosen for the new roof due to its authentic look, excellent corrosion resistance, light weight, and low cost compared to traditional solutions such as copper or clay tiles. It has a 35 micron coating and is offered with an automatic guarantee of up to 15 years.

Aesthetics and functionality

Developed specifically for roofing and facade applications, Granite® Impression provided the perfect combination of aesthetics and functionality for this sensitive roof renovation project. It is available in five different finishes: Agate, Cloudy, Elephant, Snake and Wood. All colours are stable over time thanks to the excellent UV resistance (RUV4) of Granite® Impression. With its brownish-red shade, Granite® Impression – Brown Agate includes polished patterns which imitate the surface of copper, but at a significantly lower cost.

The solution was selected by Kurp-dach, a local Polish fabricator of steel roofs and long-time ArcelorMittal customer. ArcelorMittal supplied Kurp-dach with almost 16 tonnes of Granite® Impression – Brown Agate steel.

Two different metallic substrates were utilised: S250 Z275 and S320 Z275. Almost 12 tonnes of S250 was supplied in coils 0.6 mm thick and 1,250 mm wide. Around 4 tonnes of S320 was supplied in coils 0.7 mm thick and 1,222 mm wide.

Flexible paint system simplifies forming

The roofing profiles were manufactured by Kurp-dach and then transported to the site. Granite® Impression has been specially developed for deep drawing into the most extreme profiles without any damage. This ensured the panels used on St Bartholomew’s roof could be formed without affecting the paint layer.


Related links

All info on Granite® Impression in the ArcelorMittal Europe – Flat Products' document centre
Visit the building project gallery for more case studies
Get to know Kurp-dach


With special thanks to Kurp-dach
Picture credits: © Kurp-dach