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Founded in 1960 in New York City, Cityproof has manufactured and installed over 50,000 custom-made Citiwindows® in the Greater New York area. We do jobs of all sizes, from a single window in a residential apartment to hundreds of windows in a hospital or financial institution.

Almost all site visit estimates are free of charge and without any obligation. If you provide information about the stylesize, and quantity of your windows and the problems you are trying to solve, we can provide an estimate. Required information is marked with an asterisk (*).


When measuring your windows for a soundproof interior window estimate, it is best to tell us the style and overall height, width, and available depth of the window area. When multiple windows are placed together and they share the same window sill or wall cutout, please measure that entire area. For example, if your window consists of two or three windows like the illustrations below, please measure the entire window area including the frames to determine the overall height and overall width. To measure available depth, please measure from the innermost part of the exterior window (typically the interior window frame or handle) to the corner where the wall cutout meets the face of the wall at a right angle (or 90° angle).