Casement windows are hinged at the side and open outward like a door. It looks like a picture window because unlike double hung or sliding windows, a casement window has no rail. Some casement windows are simply pushed open, but most have a hand crank. Screens are placed on the inside of the window, where they’re more protected from the elements. If you’re installing windows over a sink, countertop or appliance, a casement window with a crank can be the perfect solution.