Enjoy the feeling of being outdoors while inside your own home. Maximize your view with our custom-built butt-glazed windows. Butt joined windows provide an element of aesthetic beauty, since you are looking through glass and not hardware or frame. Butt joined windows are usually extra-large windows where one monolithic piece of glass will not fill the entire frame of the window. For butt joined windows, we take more than one piece of glass and join it directly to another piece of glass without a vertical frame to divide the two or more pieces of glass. It is glass to glass.