External blinds and shading: installation cost per m² in 2026 and how it is done

Do not choose external shading on looks alone. First decide what you want it to do: keep the room cool, black it out completely, give you privacy, or create shade over a terrace. Each type does a different job well.

• External venetian blinds: they let you control light very precisely. When you tilt the slats, the sun stays outside, but you keep daylight and the view. They suit living rooms, home offices and the large windows of new houses. In strong wind they need to be raised.
• External roller shutters: they black out the room completely, protect the window and give a sense of security. They work well in bedrooms, children's rooms and on ground floor windows. They do not let you adjust the light, though: they are either down or up.
• Screen blinds: they give shade while you can still see out. The fabric runs in side channels, so it copes with wind better than venetian blinds. They are typically fitted to large glazed areas, sliding patio doors and conservatories.
• Folding arm awnings: they create shade over a terrace or balcony, even where you cannot put up posts. They protect against sun, but not against rain or wind.
• Louvred pergolas: a solid frame with rotating roof slats. In summer they shade and let air through, and when it rains the slats close. They turn a terrace into a space you can use most of the year, but bear in mind that this is a small structure in its own right, not an add-on to a window.
• Shutters, brise soleil and natural screens: traditional shutters suit older and rural houses, fixed brise soleil suit modern façades and office buildings. Bamboo and reed screens are handy on pergolas and outdoor kitchens.

Sunlight passes through the glass, falls on the floor, furniture and walls and turns into heat there. That heat cannot escape back out through the glass, so the room warms up like a car parked in the sun. An internal blind or curtain only catches the sunlight once it is already behind the glass. The blind itself heats up and passes that heat on into the room. It helps against glare, but it does little to cool the room.

External shading stops the sun before it reaches the glass. The heat stays outside and is carried away by air moving in the gap between the shading and the façade. That is why, in modern houses with large glazed areas, external blinds and screens are often designed in from the start rather than added later. Building regulations in many countries now pay attention to summer overheating too, especially in new homes, so it is worth asking your architect or designer how the house performs on hot, sunny days.

The direction the window faces matters

• South: in summer the sun is high, so anything above the window works well, such as an awning, a roof overhang or horizontal brise soleil. In winter the low sun passes underneath and warms the room pleasantly.
• West: this is usually the hardest side. In the afternoon the sun is low and shines straight into the windows, just when it is hottest outside. Only vertical shading covering the whole window really helps: venetian blinds, roller shutters or screens.
• East: the morning sun heats up bedrooms. Roller shutters or blinds on a timer are usually enough.
• Roof windows: in a loft they are very exposed, because the sun shines on them for most of the day. Special external awning blinds and shutters are made for them, and an ordinary façade blind will not fit.

Both the result and the cost depend mainly on where the box goes, the housing in which the blind or shutter is rolled up. It is only simple if you plan the shading early.

• Box in the lintel or under the render: it is hidden above the window and cannot be seen from outside. It has to be planned during the shell construction, when the lintel is chosen, or when the windows are replaced.
• Box in the external insulation: when the façade is being insulated, the box can be set into the insulation layer. It stays hidden, but the insulation around it and the joint with the render must be done carefully. Otherwise you get a cold bridge and cracked render.
• Top-mounted box: fitted directly onto the window frame, often together with a new window. It is affordable and needs no work on the masonry. On the other hand, it adds weight to the frame, reduces the glazed area and is usually visible from inside.
• Face-mounted box: fixed to the façade above the window and covered with a metal fascia. On existing houses this is the usual solution when you do not want to cut into the wall or the insulation. The box is on show, so pick a colour that matches the windows or the façade.

In practice it often happens that people only think about shading after they have moved in, when the façade is finished and the windows are fitted. By then the only options are a face-mounted box and chasing grooves for the cable. If you plan the shading when you replace the windows or insulate the house, it can be concealed and you will not need to repair the façade afterwards.

Manual operation with a crank or cord is cheaper and works without electricity. If you have large windows, live on an upper floor or want to control several windows at once, a motor is far more convenient. With motors you choose between two systems:

• Wired control with a switch: each motor has its own switch on the wall. It is simple and reliable, but a cable has to run from the switch to the motor.
• Radio control: the motor has a built-in receiver and you operate it with a remote, a wall transmitter or your phone. The motor only needs a power supply, and the switch does not have to be next to the window. You can control blinds in groups and connect them to a smart home system.

With motorised shading, automatic controls are worth adding. A wind sensor raises the shading in strong wind, a sun sensor lowers it when the sun is strong, and a timer runs it according to the time of day. That way the house is shaded even when you are at work or on holiday, which is exactly when it matters during a hot spell.

Connecting the motor and any new power supply is a job for a qualified electrician, registered where your country requires it, not a DIY task. When planning, decide which side of the window the motor will be on, because the cable has to come out on that side. If you are building, agree the cable outlet position with the shading supplier before the plastering starts.

Comparing two quotes for shading can be tricky, because every company breaks down its price differently. A good quote should clearly state:

1. The type of shading, exact sizes and number of units
2. The slat material and profile, or the type of fabric
3. The type of box and how it is fixed to the façade
4. The control method, motor type, remotes and any sensors
5. The colour of the slats, box and side channels
6. Installation, and whether it includes the electrical connection or an electrician does that separately
7. Removal and disposal of old shading
8. Scaffolding or a platform for windows on upper floors
9. Delivery and installation dates, plus the warranty on the product and on the installation

If anything on this list is missing, ask before you sign. The items most often charged as extras are the electrical work, making good the render around the box and scaffolding.

For every product, the manufacturer states a wind resistance class. For blinds and shutters it is set according to EN 13659, for awnings and screen blinds according to EN 13561. The class applies to a specific size, and larger units withstand less. In practice, damage mostly happens during summer storms with gusty wind, when the shading has been left down and nobody is at home. A wind sensor reliably prevents this.

In freezing weather, do not operate the shading until the slats or fabric have thawed. The motor could tear frozen slats out of their channels, or overload itself. Newer motors have overload protection, but take care with older ones.

DIY guide: routine care for your shading

You can handle most of the maintenance yourself. All you need is a soft brush, lukewarm water and a little time once a season.

1. Wash the slats and fabric with lukewarm water, a mild detergent and a soft brush, without harsh cleaning products and without a pressure washer.
2. Clean dust, leaves and insects out of the side channels once a season, because they cause rubbing.
3. Do not oil the slats or channels, as dust will stick to them even more.
4. Roll up awning fabric only when it is dry. If you have to retract it wet, extend it again after the rain and let it dry, otherwise mould will start to grow.
5. Keep awnings retracted over winter, and on venetian blinds check the lifting tapes and ladder cords, which wear out first.

Do you live in a block of flats? Then the façade is usually a shared part of the building. External blinds, shutters or an awning change how it looks, so you will normally need consent from the building management or the owners' association. Check your lease or the building's rules as well, since they often cover changes to windows and the exterior. Many buildings specify a single type and colour of shading so that the façade does not end up looking like a patchwork. If you rent, you also need your landlord's permission.

In a conservation area or on a listed or protected building, any change to the façade, including shading, usually has to be agreed with the local authority or the heritage body responsible. Some towns also have their own design rules for historic centres. An awning that projects over a pavement or other public space may need permission from the council.

A pergola firmly anchored next to a house counts as a structure. Whether it needs no permission at all, has to be notified, or requires full approval depends on local building regulations and on its size, height and position, for example how close it is to the boundary. Do not assume it is automatically exempt. Check with your local building authority before you place an order.

At handover, test every unit, not just one as a sample. Go through this list:

• The shading moves up and down smoothly along its full travel, without rubbing or noise from the side channels
• When lowered, it sits evenly on the sill and the slats are parallel, with none bent
• Venetian blinds tilt evenly in every position
• The motor end positions are set so the shading does not hit the box or the sill
• All remotes, groups, timers and sensors included in the quote work
• The joints between the box, the channels and the render are finished and sealed, and the façade is undamaged
• Windows, sills and the surrounding area are clean
• You have received the instructions, the warranty and, for radio control, paired remotes

Write any defects into the handover report. Setting end positions and pairing remotes takes the installer only a few minutes while they are on site. Later on, it means another visit.