Fall arm awnings use a fabric panel mounted on a roller above the window. Two spring loaded arms, one on each side, pivot from brackets fixed to the wall. When you extend the awning, the arms drop outward and the fabric unfurls, projecting at whatever angle you set. At 0 degrees the fabric hangs vertically like a blind. At 90 degrees it projects horizontally. At 180 degrees it drops fully down. Any position in between is possible.
This adjustability is the key advantage. As the sun moves through the afternoon, you tilt the arms to track it. Morning sun sits high, so you set a shallow angle. Late afternoon sun drops low and hits windows directly, so you extend the arms further. When the sun sets or the weather changes, you retract the awning completely. It rolls up into a compact cassette or against a pelmet, sitting flush against the wall with no visible projection.
Operation is either manual (crank handle at the base of the window) or motorised with Somfy. Motorised fall arms can be fitted with sun sensors that extend the awning automatically when UV intensity exceeds a threshold, and retract it when clouds cover or the sun moves off the window. For Plett homes where owners travel or manage the property remotely, this hands off operation is practical.