Awning

An awning or overhang is a secondary covering attached to the exterior wall of a building. It is typically composed of canvas woven of acrylic, cotton or polyester yarn, or vinyl laminated to polyester fabric that is stretched tightly over a light structure of aluminium, iron or steel, possibly wood or transparent material (used to cover solar thermal panels in the summer, but that must allow as much light as possible in the winter). The configuration of this structure is something of a truss, space frame or planar frame. Awnings are also often constructed of aluminium under structure with aluminium sheeting. These aluminium awnings are often used when a fabric awning is not a practical application where sun load as well as wind loads may be a factor.

Today's awnings come in two basic types: manually operated models which are opened by hand and motorized models which operate by electricity. Each offers its own advantages. Benefits include low-cost affordability, easy adaptability to almost any deck or patio, and support arms that can be angled back against the house or set vertically on the deck or patio floor. These arms provide extra support and stability which some owners prefer in windy areas and increase the awning's versatility by making the attachment of certain accessories available.

Motorized awnings have no vertical supports. Instead, they have retracting lateral arms, creating an unobstructed shaded area. These awnings are operated by an electric motor, generally hidden inside the roller bar of the awning. The arms open and close the awning at the touch of a wireless remote control or a wall-mounted switch.

Modern awnings may be constructed with covers of various types of fabrics, aluminium, corrugated fibreglass, corrugated polycarbonate or other materials. High winds can cause damage to an extended awning, and newer designs incorporate a wind sensor for automatic retraction in certain conditions.