Thermosplastic glazing material.

Air movement through the building envelope. In the case of windows the CSA A440 standard for windows, the "A" measurement rates air infiltration.

A light weight metal used for building components. (eg: siding, soffit, fascia, capping coil, rain gutter, window profiles)

A term used to describe a window unit with a curved frame. These units, also called curved-tops or round-tops are often placed over another window.

An inert, non-toxic gas used in insulating glass units to reduce heat transmission.

Center post between two swinging doors.

Window with sash swinging outward from bottom.