Weather

Safe protection in any weather

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The term "weather" refers to all the influences that make up the weather pattern in a particular place at a particular time: sun, wind and water, as rain or snow, light and air. In order for roofs and walls to reliably protect against freezing cold, rain and snow, windows and doors must close absolutely tightly

Only then bad weather stays outside - and cosy warmth inside

Steel profile systems keep tight even under wind load

Windows, doors and façades made of steel profile systems reliably withstand wind pressure even in stormy weather. The wind load to be expected depends primarily on the location of the building - experience shows that it is stormier near the coast than inland

Germany, for example, is divided into four wind zones with different basic wind speeds (wind zone 1: basic wind speed 22.5 m/s, 2: 25.0 m/s, 3: 27.5 m/s, 4: 30.0 m/s)

However, wind load is also a factor that must be taken into account in the planning of high-rise buildings, because: The higher up in the building a window is installed and the higher the classification in the wind load zones, the greater the resistance to wind loads, driving rain and draughts must be.

Wind load on curtain walls, windows and doors

The wind load acting on a building is made up of pressure and suction forces, which act as a surface load perpendicular to the attack surface. Normally, the highest wind loads act on the corners and edges of the building. With regard to extreme weather events, it is possible to withstand negative effects of wind load through building forms with optimised flow characteristics or through the choice of external wall construction

Windows, doors and façades made of heavy-duty steel profile systems from Jansen are predestined for this: The torsion-resistant constructions reliably withstand even the highest loads.

The resistance of curtain walls to wind load (wind pressure and wind suction) is defined by DIN EN 13116; it specifies the requirements for both fixed glazed and opening parts of curtain walls. The resistance of windows and doors to wind load is tested in accordance with DIN EN 12211 and classified in classes 0 (not tested) to 5 (high resistance) in accordance with DIN EN 12210. Even with particularly exposed windows and doors in corner and edge areas, no draughts or moisture should penetrate from the outside, not even during hurricane-like storms

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Water and driving rain tightness of steel profile systems

Windows, doors and façades made of steel profile systems must be watertight - regardless of whether it is only a light drizzle or whether a storm whips the rain against the façade with all its force, i.e. driving rain occurs. The classification of driving rain tightness of curtain walls made of steel profile systems is carried out according to DIN EN 12154

The driving rain tightness of windows and doors is classified according to DIN EN 12208 and tested according to DIN EN 1027. There are two different procedures for the test: Procedure A applies to doors and windows that are exposed to the weather without protection. Procedure B applies to building elements that are protected from rain by canopies or balconies, for example

The measure of air permeability: The Q-value

Leaky joints on windows and doors are not only affected by wind, but also by the natural exchange between cold and warm air during the cold season - there is a "draft". Inseparably linked to annoying draughts is the loss of valuable heat that escapes through the joints. Only tightly closing windows and doors ensure consistent thermal insulation, which makes the Q-value described in DIN EN 12207 an important thermal insulation value for the requirements of the Building Energy Act (GEG 2020). As is already the case for the U-value, the same applies here: The lower the Q-value, the better

Steel profile systems achieve best values

The classification of curtain walls with regard to their air permeability is carried out in accordance with DIN EN 12152. The thermally insulated curtain wall systems for mullion-transom constructions - Jansen VISS, VISS Basic, VISS RC and VISS SG - achieve the best possible Q value with "AE". The thermally insulating door and window systems for exterior applications are classified in the best class 4

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Safe and standard-compliant construction with steel profile systems

In our own test centre in Oberriet, Switzerland, we can test the parameters of wind load, water tightness/imperviousness to driving rain and air permeability for windows, doors and façades made of steel profile systems. With the functional test, we ensure in advance that the planned construction reliably meets the requirements placed on it. This provides our clients with a high level of planning security - and, incidentally, we shorten the planning time for safe and standard-compliant facades, windows and doors made of steel profile systems.