Design Solution · Building Envelope
Design Solution · Dream about it
Outer solar screen cutting summer gain while keeping daylight.
A perforated/louvred outer screen wraps the glazed cube to filter direct sun while keeping diffuse daylight and views. Reducing solar gain at the skin lowers cooling demand in a hot summer climate.
A perforated or louvred outer screen over a glazed volume tackles a specific design tension: maintaining views and daylight into a building while blocking direct solar radiation in a hot-summer climate where uncontrolled solar gain would drive cooling loads and occupant discomfort. The approach is common on commercial and civic buildings in southern European and Middle Eastern climates, and the principle — decoupling the solar filter from the weather seal — gives designers independent control over each function. This record has no provided or verified evidence and sits at claimed status, so performance benefits are design-intent. The genuine value is that a fixed external screen, correctly sized for the sun path, can dramatically reduce peak solar gain without the operational dependency of active shading systems; it also protects the primary glazed envelope from direct UV and thermal cycling, extending its lifespan. Trade-offs to weigh: fixed screens optimised for summer gain control will block useful winter solar in heating-dominated climates, so the balance must be checked in the energy model; the screen adds structural complexity, wind load, maintenance access requirement and embodied carbon; and the perforation pattern that satisfies solar performance may not satisfy the daylighting or views expectation of the brief. Confirm the screen geometry against the actual sun-path data for the orientation, not generic shading rules.
#solar shading #screen facade #louvre #solar control