How a Fall Arm Awning Works

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 Knysna homes where owners travel or manage the property remotely, this hands off operation is practical.

Fall Arm vs Folding Arm: Different Products for Different Jobs

People often confuse fall arm and folding arm (retractable) awnings. They are distinct products designed for different applications.

A folding arm awning projects horizontally outward from the wall on articulated arms to create overhead shade over a patio, deck, or entertainment area. It covers a large horizontal area below it. Think of it as a retractable roof.

A fall arm awning projects at an angle from the wall to shade a vertical surface: the window itself. It does not create overhead cover for a space below. Think of it as an adjustable external blind mounted above the window.

Where Fall Arm Awnings Work Best in Knysna

West facing windows

The primary application. West facing rooms in Knysna take the full force of afternoon sun from about 14:00 through to sunset. This is the sun angle that heats rooms most aggressively because it hits windows directly rather than from overhead. A fall arm awning on the outside intercepts this heat before it passes through the glass, reducing indoor temperature noticeably without darkening the room the way indoor blinds do.

North facing facades

North facing windows receive sun for most of the day, particularly in summer when the sun tracks high across the northern sky. Fall arm awnings set at a shallow angle block the high summer sun while still allowing the lower winter sun to warm the room. This seasonal balance is valuable in Knysna where winters are cool enough to want that solar warmth.

Upper storey windows

Windows on the first or second floor are harder to shade with external structures. Fall arm awnings mount directly to the wall above the window, needing no posts or ground fixing. They suit upper floors where a patio awning is not possible.

Estate and heritage properties

Thesen Island, Pezula, Simola, and Leisure Isle all have architectural guidelines. Fall arm awnings retract completely flush, leaving no permanent visible projection. This clean profile often meets estate aesthetic requirements where bulkier shade structures would not be approved. Custom Blinds can provide specification drawings for body corporate or estate applications.

Fabric and Frame Options

The frame is powder coated aluminium with stainless steel spring mechanisms rated for coastal conditions. The cassette housing (where the fabric rolls up when retracted) can be colour matched to your building facade.

Fabric choice affects both performance and appearance. Solution dyed acrylic is the standard for Knysna: it holds colour under sustained UV, breathes to prevent heat buildup on the fabric surface, resists mould in Knysna’s humidity, and dries quickly after rain. For maximum privacy or weather blocking at a specific window, PVC coated polyester provides a solid, waterproof panel.

Widths up to 6 metres per unit are available. Projection depths range from 0.75m to 1.4m depending on the arm length specified. Duncan recommends arm length based on the window height, sun angle at the property, and how much shade coverage is needed at the hottest part of the afternoon.