A Metal Window was a craftable, placeable item made out of Low Quality Metal. They could they may only be placed on a Metal Foundation or a Metal Ceiling, between two Metal Pillars. They appeared as a standard wall made out of rusty sheet Metal with a square hole for a window in the center.
They could only be rotated by scrolling your mouse wheel before being placed. It was impossible to rotate a wall after it had been placed.
Windows were the leading cause of house raids. It was suggested that players only use windows if they were building a structure at least three levels high, and were unable to place a foundation on the ground below it. You can also use Metal Window Bars to stop people getting in.
It took 20 seconds to craft a Metal Window.