We offer a wide range range of thresholds for your composite including a part m compliant wheel chair access, full frame or low frame. Don’t forget when ordering you door you also have a choice of door cills including the standard 150mm or for tighter positions the 85 mm stub cill. Both our cills are 30mm high and will be included in the finished manufacturing height. Our drainage automatically changes so that you don’t have to worry about it. Our add-ons come in three sizes 15mm, 25mm and 50mm again are included in the finished manufactured size.