Stack refers to the area on the wall where window treatments rest when they are opened and the window is exposed. For vertical blinds, stacking refers to the direction in which the blind opens. The most common types are left stack and right stack. If you order a left stack, the slats will be drawn to the left side of the window when fully opened. For a right stack, the vanes will be drawn to the right. Other choices include split stack, in which the blinds open from the middle, with half of the vanes stacking on the left and half on the right; and center stack in which the blinds open from both sides and stack in the middle of the window. For horizontal blinds, "stacking height" refers to how much area the product will cover when the blind or shade is drawn fully open. The smaller the stack height, the greater the view to the outside. Some products inherently have larger stacks than others. For example, a Roman shade will have a larger stack than a cellular shade. If having a full view out of a window is desired, please be sure to do an outside mount and add the stack to the height to clear the window.
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