Sliding windows are a staple of modern architecture—there’s no way to imagine a modern house without them. The multi-step elevated sill design of One Sky’s 798 series profile has a drainage hole to prevent water leakages, along with an easy-to-install insect screen that is easy to install and remove for cleaning and repairing. Sliding motion won’t be a problem because of the top and bottom plastic guides—sudden impact forces won’t be either thanks to its sound-insulated dense strip design.