Magnelis® – the new material for standing seams
Bevego has also been working with a sister company to develop roadside safety equipment out of Magnelis® coated steels from ArcelorMittal. From autumn 2021 they will start to use Magnelis® for standing seam roofs. “Architects like the patina that darkens over time, and Magnelis® has minimal reflectivity, making it suitable for low buildings,” says Johan Cronhamn.
“The Magnelis® we use in roadside applications has a thickness of around 3.0 mm, and it is able to withstand the very corrosive effects of road salts,” notes Johan Cronhamn. “In roofing applications, we will use it in a thickness of 0.6 mm. That will provide the material flexibility roofers need, and long-term protection against corrosion.”
Bevego is a leading provider of sheet metal, ventilation systems, and equipment for roofing and industry applications. Based in Sweden, the company operates more than 30 retail outlets, a steel service centre, and four plants which produce ventilation systems.
Outstanding standing seam roofs with Granite® HFX Cool Matt and Magnelis®
Across Europe, standing seam roofs are a key feature in the landscape of many cities and towns. Made from flexible metals, they are an ideal solution for the odd-shaped roofs of apartment blocks and public buildings where every millimetre of space under the roof is utilised. The standing seam provides a high level of resistance to wind and excellent watertightness, making it a popular roofing solution today. Organic coated steels such as the Granite® HFX Cool range from ArcelorMittal Europe – Flat Products offer the necessary pliability, combined with a hard-wearing finish that is guaranteed for up to 20 years. Bevego, a leading provider of roofing solutions and equipment for the Swedish market, recently started utilising the latest product in the range – Granite® HFX Cool Matt.
Standing seam roofing
Traditional standing seams are formed from strips of metal which are laid vertically down the roof. The standing seam is formed by bending up the edge of a strip and folding it over, together with the edge of the neighbouring strip. The result is a double standing seam which is totally weatherproof.
Roofing complexity demands ductility
“To achieve the double standing seam, roofers need flexible materials,” says Johan Cronhamn, business area manager for Bevego. “For complicated roofs with lots of dormer windows and chimneys, the work has to be done on site and at height. Granite® HFX Cool Matt handles well and can be formed at temperatures down to -10°C – a key consideration when it comes to the Swedish climate!”
Traditionally, standing seam roofs were made with copper and zinc – metals which are initially bright but become duller over time. In the early 2000s, materials with a gloss finish became more popular. Over the last few years, the market has switched back, explains Johan Cronhamn: “There is a strong preference now for low-gloss roofing. The steel is bent and pressed into shape on the roof and the matt colour disguises any minor marks. That is another reason for the growing popularity of Granite® HFX Cool Matt.”
ArcelorMittal Europe Communications
brizmaker / Adobe Stock by courtesy of Bevego
Palatinate Stock / Shutterstock.com