Watch VELUX skylights being hit by synthetic hailstones the size and weight of cricket balls at speeds of up to 172 kph – faster than any fast bowler has ever delivered a cricket ball. Even though hailstorms are Australia’s costliest natural disasters, there is no official hail test for glass skylights. We had to replicate the American Solar Collector Hail Impact Test (ASTM E822-2009) – but at a more extreme level…
