Glare protection fabrics
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GLARE CONTROL FABRICS
The prevention of glare is one of the most important functions of an internal shading solution. Clearly, glare can have a major impact on our ability to work with a computer screen in the office or read digital boards in a class room. When occupants experience glare, their ability to do their job plummets dramatically.Glare control is best achieved by roller blind fabrics having an openness of less than 5% and consist of opaque yarns or are metallised on one side. Read below why.
Glare – A manageable annoyance
What is glare?
Glare can occur when the amount of light on the eye is too high or when there are contrasts in the field of view that are too extreme. Often, both situations occur simultaneously. In an office, this can easily happen when there’s direct sun on the façade. Research showed that the total amount of light at the eye (illuminance or lux-value) is the strongest predictor of glare. If this value exceeds 3000 lux, most office workers will experience severe glare.
How to control glare
Clearly, glare can be controlled by reducing the amount of light entering through the windows. The effectiveness of doing this depends on how much of this reduced light flow is directly transmitted and how much is diffusely transmitted. Ultimate glare control is achieved by black out fabrics. In most cases, this is not the level of control needed.
The European norm EN 14501 gives a practical framework for quantifying glare control. In EN 14501, the ability to control glare is classified on a scale of 0 to 4, where 0 indicates very little effect and 4 indicates a very good effect.
In general, we recommend fabrics having glare control class 2 or 3. These are fabrics that have an openness of less than 5% and do not allow more than 4% of the light to pass through the yarns. These fabrics will provide adequate glare control for occupants viewing parallel to the window.