In roll forming, aluminium strips are passed through successive rollers and formed into the desired shape for the slats piece-by-piece. These slats have a particularly high wind load resistance compared to an extruded slat. Extruded profiles are made from an aluminium press block that is heated and then pressed. The result is a slat in the desired shape with a very high material thickness, which makes the slat and the garage door overall more stable and robust. An extruded slat is particularly useful when you need increased safety or high stability.