Triangular Window Blinds
Blinds shaped to fit your triangular window
Triangle windows. Angled windows. Apex peaks. Asymmetric gables. We make motorised cellular blinds shaped to the exact geometry of your window, surveyed in your home and fitted by our own team.
The Problem We Solve
Standard blinds do not fit triangular windows
Triangular windows are a striking architectural feature. They are also one of the hardest windows to dress. Off the shelf blinds are cut for rectangles. Curtains do not work on an angle. The result is excessive light, glare, heat, and a complete lack of privacy on a window that is often the focal point of the room.
Our solution is a bespoke motorised cellular blind, shaped to your exact triangle. We survey the window, take a precise template, and the blind is manufactured to match the geometry to the millimetre. It is operated by remote control, wall switch, or smartphone, because most triangular windows sit too high to reach by hand.
The fabric is 32mm honeycomb cellular material, which is mandatory for shaped blinds. The wider cell holds the fabric taut on the guide wires that follow the slope of your window. Choose translucent for soft daylight or room darkening for sleep and privacy. When the blind is open, the pleats stack tightly along the slope and the window is virtually clear.
Triangle Variations We Cover
Every angle, every geometry
Triangular windows come in many forms. Here are the most common we work with.
Right Angled Triangles
One vertical side, one horizontal sill, and a sloping hypotenuse. Common above a doorway or under a sloping roofline. The blind stacks down the slope to the corner, leaving the window clear when retracted.
Symmetrical Apex
A pointed peak with two equal sloping sides. Tall apex windows are a feature of many modern self builds. We fit a blind that follows both slopes to the peak, with the fabric stacking neatly to either side.
Asymmetric Gables
Two sloping sides of unequal length, often above a staircase or in a converted attic. The blind is shaped to match the actual angles of your window, not a generic template. See our gable blind guide.
Trapezoid & Truncated Triangles
A triangle with the top cut off, leaving a flat horizontal section at the peak. Common when an apex window has been modified for structural reasons. The blind handles the transition smoothly.
Single Angled Slope
A rectangular window with one angled top edge, often found in loft conversions where the roofline cuts across the window. The blind is rectangular at the bottom and follows the angle along the top.
Other Unusual Shapes
Pentagons, irregular polygons, arched fanlights, and one off geometries. If your window is not a triangle, we still want to hear about it. See blinds for all shaped windows.
The Technology
Why the standard blind on the high street will not work
A blind for a triangular window has to do something a rectangular blind never has to do. It has to track an angle while the fabric stays taut, and it has to stack to the slope when retracted rather than bunching at the top.
We use motorised honeycomb cellular blinds from MasterBlinds, powered by Somfy IO motors. The fabric is 32mm cell, which is mandatory for shaped and angled installations. The wider cell holds the fabric flat against the precision guide wires that run along the slope of your window.
Operation is by Somfy remote, wall switch, or the TaHoma smart home app, with optional integration into Apple HomeKit, Amazon Alexa, or Google Home. Most of our clients schedule the blind to open at sunrise and close at sunset, automatically.
32mm Honeycomb Cell
Required for TriangularThe 25mm cell does not have enough structure to hold the fabric flat against guide wires on an angle. 32mm is the only option for triangular and gable windows.
Somfy IO Motor
Whisper quiet, reliable, and smart home compatible. Mains powered for permanent installations or rechargeable battery for windows where wiring is difficult.
Light Gap Performance
Cellular blinds sit close to the glass with a light gap of 0 to 12mm vertical, compared to 35 to 60mm on a roller blind. Far better for sleep, privacy, and heat retention.
Common Questions
Questions about triangular window blinds
How wide can a triangular blind go?
The maximum width depends on the model and motor system. The widest single triangular blind we typically install is around 3.6 metres at the base. For larger windows we can run two or three blinds side by side, all controlled together by one remote, and the seams between them are barely visible. We confirm the right configuration during the survey.
Can I have it manual instead of motorised?
If the window is reachable, manual operation with a telescopic pole is possible and reduces the cost. The honest answer though is that almost every triangular window we are asked to dress sits too high to operate by hand on a daily basis. Motorisation is what makes the blind genuinely useful rather than a one off adjustment.
What does it look like when retracted?
The fabric pleats stack tightly against the bottom edge or to one side, depending on the geometry of your triangle. Unlike a roller blind that bunches at the top and blocks part of the window, a cellular blind folds flat and follows the slope. When fully retracted on a tall apex window, you see the full triangle of glass with just a slim headrail and a stack of fabric at the corner.
How much does a triangular window blind cost?
It depends on the size of the triangle, the geometry, and whether the blind is motorised or manual. There is no such thing as a typical triangular window. As a very broad guide, a motorised cellular triangular blind for a domestic window typically falls somewhere between £1,200 and £3,000 including VAT, with larger or more complex shapes higher again. The fastest way to get an accurate answer is to send us a photo of your window with rough dimensions. We will come back to you very quickly with a price and, just as importantly, a feasibility view on whether a blind is the right answer for your window. Send us a photo.
Can you fit a shutter to a triangular window instead?
Yes. For some triangular windows a shaped shutter with fixed louvres is a beautiful permanent solution. The trade off is that the louvres are fixed at one angle, so you cannot vary the light through the day. For most clients with triangular windows that need to be opened and closed regularly, a motorised cellular blind is the better answer. We will advise honestly at survey on whether a blind, a shutter, or a combination is right for your specific window. See special shape shutters.
What is the lead time?
From the day we take the survey, allow approximately eight to ten weeks for manufacture and installation. Triangular blinds are made to order from your specific template, so the lead time reflects the bespoke nature of the product. We will give you a confirmed installation date as soon as the order is placed.
What Our Customers Say
"I would like to pass on our thanks to the whole team. Everyone was so helpful, professional and above all patient when we were deciding from the vast choice we could have had. The fitting posed no problems and all we needed to do was stand back and admire the end result."
Kathleen Melville, Carnoustie
"We had Duette blinds fitted in our conservatory and the difference in temperature is remarkable. The whole room is usable again in summer. Brilliant product and brilliant team."
Marie Hebden
Our Five Year 'Perfect Fit' Promise
When you choose our family run business, you get the highest quality workmanship and a long lasting shutter or blind solution designed perfectly for you.
Accurately Measured
Precision survey by our trained specialists
Meticulously Fitted
Expert installation by our own team
Guaranteed for 5 Years
If you have a problem, we solve it
Have a triangular window nobody else can fit?
Send us a photo or book a home consultation. We will tell you exactly what is possible and give you a no obligation quotation. Triangular and shaped windows are what we do best.