Anyone who has tried to dress a large window knows the trade-off. Vertical blinds give excellent control but can look hard and office-like, while net curtains soften the light but offer little privacy once the lamps are on. Allusion blinds sit between the two. Each vane combines a sheer voile section with a solid, textured layer, so tilting the vanes changes the room from a soft, diffused view to a fully screened one without changing the blind. They are made for big openings such as large windows, patio doors and bi-fold doors, and they are worth a look for the bay windows that are so common across London. This guide explains how they work, where they fit and what to check before you commit.
What makes an Allusion blind different
The defining feature is the dual-layer vane. Instead of a single strip of fabric, each vane pairs sheer voile sections with opaque, textured fabric layers. The supplier describes a patented weave that joins the sheer and opaque parts, and it is this construction that gives the blind its dual personality.
The second feature is the lack of bottom chains or weights holding the vanes together. Because they are not joined at the bottom, you can walk through the blind at any point, even when it is drawn. In a home with patio doors or bi-fold doors, that means going out to the garden does not require pulling the whole blind aside.
These two features explain why the blind is positioned as an alternative to both vertical blinds and net curtains. It offers the hard-working control of the first with the filtered light of the second, in a form that looks like a single, considered piece rather than two layers fighting each other.
How the tilt controls light and privacy
The vanes tilt, and the angle sets the mood of the room. With the vanes open, the sheer voile sections are what you look through, so you get a diffused view and a softer daylight. With the vanes closed, the opaque layers overlap to provide privacy and, according to the supplier, a complete blackout.
That range is useful through the day. In the morning, open vanes keep the room bright while still softening the view of the street; in the evening, closing them gives a screened, enclosed feel without the need to hang a second layer. Between those positions, small changes of angle let you balance brightness against privacy.
The supplier also states that the blinds can reduce solar glare and heat build-up in summer and help retain warmth in winter. As with any such claim, the effect depends on the orientation of the window, the glazing and the fabric, so it is sensible to ask for a sample and view it at your own window rather than rely on a general promise.
Are they right for a bay window?
Bay windows are a common feature of London homes, from Victorian terraces to Edwardian semis, and they create their own problem: a series of angled panes that need coverage without blocking the view or the light. The supplier’s page describes Allusion blinds for large openings and glazed areas and does not give specific guidance on bay windows, so this is something to raise at the consultation.
In practice, the approach for a bay usually depends on its shape. Some bays are dressed with a separate blind in each section, others with a continuous track that follows the angles. Which arrangement suits an Allusion blind depends on the geometry, the depth of the recess and how the vanes will clear the corners when they turn.
Look at these points when the fitter visits:
- The angle of the bay, and whether the vanes can rotate fully without catching the neighbouring section.
- The depth of the recess, which determines whether the blind can sit inside the bay or must be fitted outside it.
- Obstacles such as radiators, window handles and sills that project.
- How the stacked blind will look when open and whether it blocks any part of the view.
None of this is unusual, and an experienced fitter will check each of them during the survey. The advantage of a made-to-measure product is that the answers shape the blind rather than the other way round, but it does mean the decision should wait until the windows have been looked at properly.
Patio doors, bi-folds and large glazing
Where the Allusion blind is a more obvious fit is across wide, glazed openings. Patio doors, bi-fold doors and extension walls are exactly the places where a vertical blind is typically considered, and the blind’s walk-through quality is an advantage because the doors are used often.
The sheer sections help here too. A glazed extension in a London garden room can be bright to the point of discomfort at midday, and a blind that lets some light through while softening it keeps the room usable without shutting out the garden. When the vanes are closed, the opaque layers cover the glass at night.
Because the products are made to measure, the width and height of the opening do not need to match a standard size. The supplier does not publish size limits on the page, so very wide or tall openings should be raised at the consultation, along with any wish for motorised operation, which is available and controlled by remote.
Allusion compared with nets and curtains
It is worth comparing the blind with the other options you might be weighing. A traditional net curtain is cheap and soft but offers little at night, and a heavy curtain gives privacy but blocks daylight and takes up wall space when open. The Allusion blind aims to replace both with a single layer that you adjust, rather than draw and re-draw.
If you are still deciding between a blind and a curtain for the same opening, understanding curtain sizing is a useful comparison. A practical explanation of how wide and how long curtains need to be, including the point that fabric usually needs to be around twice the width of the window, is given in https://kellysblinds.co.uk/all/what-size-curtains-do-i-need/, and it makes it easier to judge how much space and cloth a curtain solution would involve.
The comparison also depends on how you use the room. A formal living room might suit curtains for their warmth and softness, while a kitchen-diner with bi-fold doors may be better served by a blind that does not need to be pushed to one side. There is no universal winner, and some homes use both, with a blind for control and curtains for decoration.
Fabrics, textures and interior style
The supplier says the blinds come in a range of shades and textures to suit minimalist or traditional interiors, though it does not name specific fabrics or give a colour palette on the page. That is another reason to see samples. A texture that looks calm on a screen can appear busier on a large window in real light.
When choosing, consider the colour of the walls, the floor and the furniture. A pale, warm tone usually brightens a room and keeps the blind in the background, while a darker shade can add depth to a larger space. In either case, check how the fabric looks both with the vanes open and closed, since the effect differs.
Think too about the blind as seen from outside. At night with the lights on, the closed vanes present a plain face to the street, and during the day a sheer view may give a hint of the room. If that matters, ask the fitter to show you the effect from the pavement side of a sample.
Measuring, fitting and aftercare
Allusion blinds are installed by the supplier’s specialist fitters rather than as a self-fit product, and the process follows four steps: a free, no-obligation consultation and quote, a precise measuring visit, made-to-order production in the UK and professional installation. The fitters test the blind and tidy up afterwards.
The practical question is how to start. Because the vanes are cut to fit and the arrangement in a bay or across glazed doors depends on the survey, the simplest route is to arrange an allusion blinds fitting service London homeowners can book as a free consultation, with the fitter checking the measurements and the track position in person. Every installation is covered by a quality fitting guarantee, though the page does not set out its length or terms, so it is sensible to ask for these in writing.
Day-to-day care is straightforward, but ask about cleaning when you choose the fabric. Some textured weaves hold dust more than smooth ones, and a fabric that is difficult to clean will not stay attractive. A short written note on care from the fitter, kept with the guarantee, helps keep the blind looking its best.
A hybrid worth seeing in person
Allusion blinds are best understood by seeing them. The sheer and opaque layers, the walk-through gap and the tilt are all easier to judge with a sample in front of you than from a description. If your window is a large one, whether a patio door, a bi-fold run or a bay, the combination of control and softness may be worth a look.
Frequently asked questions about Allusion blinds
Can you walk through an Allusion blind?
Yes. The vanes are not joined at the bottom by chains or weights, so you can pass through the blind at any point, even when it is drawn. This is helpful in front of patio doors and bi-fold doors that are used often.
Do Allusion blinds give full blackout?
The supplier says the closed vanes overlap the opaque layers to provide privacy and, according to the page, complete blackout. As the result depends on the fabric and fit, ask to see a sample at your own window.
Are Allusion blinds available with motors?
Yes. Motorised versions can be operated by remote control, which suits wide or high openings where operating the blind by hand would be awkward.
Is the fitting included?
Installation is handled by the supplier’s specialist fitters after a free consultation, a measuring visit and made-to-order production in the UK. Every installation is covered by a quality fitting guarantee, whose terms you can ask to see.
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