We consume infinite energy trying to push heat outside our homes with air conditioning, while the simplest and most natural solution is… to never let it in! The ultimate guide to external shading systems, the true "shield" of your building.
There is a huge myth in Greece: "The sun is hitting the window? Close the internal curtains or the internal blinds to cool down." This is a tremendous physics mistake. When solar radiation passes through the glass, it has already entered the house. The internal curtain simply absorbs the heat and turns into a massive radiator emitting heat inside your living room (the well-known Greenhouse Effect).
The only way to passively cool your home - reducing air conditioning needs by up to 40% - is to stop the sun outside the glass. Let's explore the 4 top systems on the market.
This is the ultimate "high-end" choice for those who want full control. Imagine the classic office internal blinds, but made from heavy-duty aluminium and installed externally. The only system that allows you to adjust the blade tilt angle.
You can "cut" the vertical rays of the summer sun that bring heat, while simultaneously allowing natural, indirect light to enter the room. No more dark houses in summer! The tilt adjusts according to the sun's angle throughout the day.
The louvres run inside stable, side aluminium guides, offering excellent wind resistance. They don't "rattle" even in strong gusts, unlike older-technology free-hanging external fabrics.
They integrate perfectly with home automation systems. If the sun sensor detects strong sunlight, they lower and close automatically. Similarly, they open when the sun sets or if very strong wind picks up (wind sensor).
If you don't like the industrial aesthetics of aluminium and you have large openings (e.g. huge balcony doors), Zip Screens are the magic of modern fabric technology. They are called "Zip" because the fabric edges have a zipper that locks into the side guides.
Made from special micro-perforated fabrics (e.g. Soltis, Screen). The amazing thing is that during the day they block 90% of heat and UV rays, while you can see outside and enjoy your view, without being seen from the outside! They work like a mirror.
The Zip technology means they stretch perfectly taut and don't "rattle" even in 8 Beaufort winds, thanks to the zipper system that locks firmly into the side guides. Ideal for seaside residences.
Living rooms with great views, open-type balcony doors, and openings where you want to keep the view without "closing" the space. The light control is on/off only (tilt cannot be adjusted like louvres).
These are not the old wooden pergolas with lattice screens. The bioclimatic pergola is an imposing aluminium structure that functions as a natural extension of your living room onto the balcony or garden. Its roof consists of motorised louvres.
Open the motorised roof louvres slightly to create an air current (chimney effect) that pushes hot air upwards, while maintaining shade. Effective natural cooling without any electricity consumption.
When it rains, the louvres close hermetically, water is channelled into hidden gutters inside the columns, and you can enjoy your coffee outside, completely dry. Modern pergolas can even withstand snow loads.
They can accept Zip Screens, glass panels, or heating panels around the perimeter, converting your balcony into a proper room for 365-day-a-year use. Ideal for rooftops, gardens, and large balconies.
The word comes from French and means "breaking the sun". These are architectural "fins" (usually from heavy-gauge aluminium or treated wood) permanently fixed to the facades of modern buildings. Ideal for a minimalist appearance with zero motor maintenance needs.
For South-facing windows, Horizontal Brise-Soleil are installed (like small canopies). In winter (sun low at 28°) they let rays pass and heat the house for free. In summer (sun high at 75°) they create deep shade. For West-facing windows - the worst, horizontal afternoon sun - Vertical Brise-Soleil are mandatory.
No moving parts, no motors, no electrics. The fixed fins never break and require absolutely no maintenance. Their geometry does the work instead of automation, relying on the sun's angle.
Ideal for modern, minimalist building facades. They create a striking visual impression without visible machinery and roller shutters. Combining aesthetic excellence with sun-protection functionality.
| System | Light Control | Wind Resistance | Visibility | Ideal Use |
|---|---|---|---|---|
| Movable Louvres (Raffstores) | Excellent (full adjustment) | Good | Moderate | Bedrooms, Offices |
| Zip Screens (Perforated) | Moderate (on/off) | Excellent | Excellent (from inside) | Living rooms with great views |
| Bioclimatic Pergolas | Excellent (roof) | Excellent | Depends | Rooftops, Gardens, Balconies |
| Brise-Soleil (Fixed) | Moderate (geometry) | Absolute | Good | Modern Facades |
Having the summer sun hit your windows directly is the equivalent of turning on the heater in July. External shading - whether fabrics or movable louvres - is an investment in "passive cooling".
The purchase cost may seem considerable, but reducing your home's temperature by 5°C to 8°C - before you even turn on the air conditioning - translates to immediate and permanent savings on your electricity bill, with up to 40% reduction in cooling consumption.
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