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Sto EWIS with basalt fibres is impact-resistant and non-combustible
With mineral wool as its base and reinforced with basalt fibres, the new StoTherm Classic S1 facade insulation system is non-combustible and can even be used above high-rise level. It is resistant to an impact of more than 100 joules and its mineral wool insulation of up to 34 cm, which has general building inspectorate approval, makes it suitable even for passive houses and buildings with very low energy requirements.
Natural basalt that is also used for the heat shield in space travel, provides the properties of the system, which combines organic reinforcement and finishing renders that have been proving their worth in application for many years, with a mineral insulant (mineral wool or mineral wool lamella). The resulting hybrid system marries non-combustible mineral EWIS (the central trump card) and the benefits of an organic system (crack-proof, mechanically resistant, flexible in terms of layout and design).
Higher
StoTherm Classic S1 has achieved general approval (Z-33.43-61) as a non-combustible insulation system (A2-s1, d0 according to EN 13501-1) based on mineral wool. Thanks to these properties, it can even be used on high-rise buildings of up to 100 metres in height. Organic finishing renders can thus prove their strengths such as high crack and superior impact resistance even above high-rise level.
Furthermore, the latest developments in general building inspectorate approval meant that mineral wool up to 34 cm thick can be used both in new buildings and in refurbishment projects. As such, the system is also suitable for higher passive house projects or nearly zero-energy buildings such as those stipulated in the Energy Performance of Buildings Directive (EPBD for short).
Harder
Thanks not least to the high-tech natural basalt fibres in the StoArmat Classic S1 reinforcing compound, the system, which is entirely cement-free, benefits from a previously unheard of impact resistance of up to 100 joules. The latest European guideline (ETAG 004) demands at least 3 joules for organic systems. With comparable layer thicknesses, purely mineral systems are able to achieve a mechanical resistance of between 3 and 5 joules. The extremely high impact resistance of the new system has not come at the expense of water vapour or carbon dioxide diffusion capacity.
More intense
The new facade insulation makes something possible which is not possible with mineral systems due to the limited tintability of their finishing renders: designing high-rise buildings in intense colour shades. Now even very dark surfaces are possible on non-combustible constructions. Even the standard lightness value of 20 (lightness value 100 = white, lightness value 0 = black) which represents the limit of feasibility for most facade insulation systems, can be undershot on request. The Stolit finishing render used in such applications is highly resistant to algae and fungi and can be tinted in all 800 shades of the StoColor System. Despite the mineral insulating layer, neither priming nor levelling paint coats are necessary.
“StoTherm Classic S1 brings together the best part about mineral systems with the benefits of organic systems; combined with a mineral wool panel thickness of up to 34 cm, we are looking at the facade insulation of the future for applications in which non-combustibility is required.”
Dipl.-Wirt. Ing. Dirk Herrmann, Product Management Germany, Sto AG, Stühlingen.
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Image: Sto AG
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The StoTherm Classic S1 facade insulation system combines the benefits of the non-combustible mineral insulant with those of an organic reinforcing compound and top coat. It is highly impact-resistant and provides a way of using very dark colour shades on buildings. A shining example of this type of application is the plinth area of the Asklepios Westklinikum in Hamburg.
Photo: Christoph Gebler, Hamburg
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Dipl.-Wirt. Ing. Dirk Herrmann Product Management Germany, Sto AG, StühlingenPhoto: Sto AGDownload Image (300dpi) |
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