The classification method that Rockpanel uses for measuring the colourfastness of the facade boards is the ISO 105 A02. This grey scale determines the colour change of product samples. The scale ranges from 1 (significant variation – the worst rating) to 5 (no variation – the best rating).
But how does this test work? Of course, we want to offer the best quality for decades long, but it would take too long to wait multiple years for the real-life test results. That’s why we use the results of a weathering test of 3000 and 5000 hours. This represents the weathering on a vertical south-facing facade.
For this purpose, small samples of our boards are tested in artificial weathering equipment. With very strong Xenon lamps, we simulate intense, non-stop UV radiation. After 3000 and 5000 hours, the colour variation of the samples is tested via a measuring device, ensuring the most objective and accurate measurements.
Many other producers of cladding boards only provide results of colour fastness tests after 3000 hours, so it’s important to have a look at the period used when comparing results.