Aluminium sun louvers (brise-soleil) are angled blades fixed outside windows and facades to block high sun while keeping views and daylight, cutting the cooling load that dominates energy use in hot climates like the Gulf. Aluminium suits them because it is light, PVDF-coated for colour and does not rust. You choose blade profile, spacing and angle for the orientation, and fixed or motorised adjustable systems.
Why external shading beats internal blinds
Shading works best outside the glass: a brise-soleil blocks solar heat before it enters, where an internal blind only stops it after it is already inside. In hot, sunny climates that difference is large — external aluminium louvers can noticeably cut the air-conditioning load and glare while keeping the view and daylight.
Blade profiles and orientation
Louvers come as extruded aerofoil blades, flat blades or tubular profiles, horizontal or vertical. Horizontal blades suit south elevations (high sun); vertical fins suit east and west (low, raking sun). Blade depth, spacing and angle are tuned to the orientation and latitude so they cut summer sun but let winter light in — a simple sun-path calculation sets this.
Fixed vs adjustable
Fixed louvers are simplest and cheapest — set the angle and leave it. Motorised adjustable louvers track the sun or user preference for best performance and a dynamic facade, at higher cost and with maintenance. Most projects use fixed brise-soleil; adjustable suits premium or performance-driven buildings.
Specifying and matching the facade
Give the elevation/orientation, blade profile and depth, spacing, angle, span between supports, PVDF colour, and fixed or adjustable. Since it is the same PVDF aluminium as the cladding, louvers colour-match the ACP or panels on the same building. Confirm wind-rated fixing — louvers catch wind, so bracket and blade gauge must suit the exposure.
Frequently asked questions
What are aluminium sun louvers for? External solar shading (brise-soleil) that blocks high sun and glare while keeping views and daylight, cutting cooling load in hot climates.
Why shade outside the glass? External louvers stop solar heat before it enters; internal blinds only stop it after it is already inside, so they cut far less cooling load.
Horizontal or vertical blades? Horizontal for south (high sun); vertical fins for east and west (low, raking sun).
Fixed or adjustable louvers? Fixed is simplest and cheapest; motorised adjustable performs best and looks dynamic but costs more and needs maintenance.
Related: perforated & expanded aluminium facade · aluminium curtain wall systems · ACP colour selection.
Talk to the factory: GSM BuildTech (Beijing Guanshimao Technology Co., Ltd.) makes insulated aluminium panels, FR aluminium composite panels, aluminium honeycomb panels, sun louvers and PVDF aluminium coil in Tianjin, China. Email sales@insulatedaluminumroof.com or WhatsApp +86 155 2274 6824 for factory-direct pricing. See the technical reference & FAQ.
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