Single or double hung window. 2 panes of glass, one on top of the other. One or both panes may slide up and down.


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Picture window with 2 side panes that slide open left and right. Typically found in living rooms and master bedrooms.

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Casement window, also called a crank-out. One pane of glass, opens from either the left or right by turning a crank handle.


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Patio doors. 2 large panes of glass. Most patio doors slide open; some swing open like traditional doors.

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French panes, also called cut-ups. In the example on the left, there are 8 panes of glass, divided by permanent frames. So, if you were counting this window, you would say "8 of type 9".

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Picture window. One pane of glass, fairly large, cannot be opened. No panes on either side. Typically found in living rooms and master bedrooms.


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Side Lite. One pane of glass. Tall, narrow, and usually on both sides of the front door.


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Slider window. 2 panes of glass, one or both panes slide open left or right.


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Geometric shapes. One pane of glass. Does not open. Can be half cirlcle, triangle, full circle, octagon, etc.


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Everything else. Every home is different. If you have a window that doesn't fit into the other categories, count it here. Count each individual piece of glass.

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