Everything You Need to Know About Curtains for Triangular, Angled & Gable End Windows
Apex windows are one of the most striking architectural features in modern homes. Often found in loft conversions, vaulted ceilings, and gable-end extensions, these triangular or angled windows flood a room with natural light and create an impressive sense of space.
However, while apex windows look beautiful, covering them with curtains can be challenging.
Standard curtain solutions rarely work for triangular windows because of their unique angles and height. Tracks must often be custom bent, measurements must be exact, and installation requires specialist knowledge.
In this guide, we explain everything you need to know about apex window curtains, including the best curtain styles, track systems, measuring tips, and installation advice.
What Is an Apex Window?
An apex window is a window installed in the triangular section of a wall that follows the slope of a roof.
These windows are commonly found in:
- Gable end walls
- Vaulted ceilings
- Loft conversions
- Modern extensions
- Barn conversions
- A-frame houses
Because the top of the window forms a triangle or steep angle, standard curtain tracks and off-the-shelf curtains rarely work.
This is why most homeowners require made-to-measure apex curtains.
Why Apex Windows Are Difficult to Cover
Apex windows present several challenges when installing curtains.
Angled Track Systems
Standard straight curtain tracks cannot follow the slope of an apex window. Instead, a custom bent track must be manufactured to match the angle.
Height
Many apex windows reach 5–8 metres high, meaning installation often requires specialist equipment.
Curtain Weight
Large curtains covering tall windows can be heavy, requiring professional track systems such as Silent Gliss or heavy-duty aluminium tracks.
Precise Measurements
Even small measurement errors can prevent curtains from closing correctly along the angled track.
Because of these challenges, many curtain companies simply avoid apex window installations.
Best Curtain Styles for Apex Windows
There are several curtain styles that work well for apex windows depending on the room and window size.
Pencil Pleat Curtains
Pencil pleat curtains are one of the most versatile styles for apex windows.
They offer:
- Soft gathered folds
- Flexible fullness
- Compatibility with most track systems
This makes them ideal for large installations.
Wave Curtains
Wave curtains create a modern flowing appearance and are often used in contemporary homes.
Benefits include:
- Clean symmetrical folds
- Smooth operation on long tracks
- Elegant modern appearance
Wave curtains are popular in large glazed gable walls.
Pinch Pleat Curtains
Pinch pleat curtains provide a more structured and luxurious appearance.
They are commonly used in:
- Master bedrooms
- Living rooms
- Luxury properties
Curtain Tracks for Apex Windows
The curtain track is the most important component of an apex curtain installation.
Because of the angles involved, tracks are normally custom bent.
Common options include:
Silent Gliss Tracks
Silent Gliss is widely regarded as the industry leader in curtain track systems.
Advantages include:
- Smooth operation
- Custom bending for angled windows
- Strong aluminium construction
Heavy Duty Aluminium Tracks
For very large curtains, heavy duty aluminium tracks are often used because they can support heavier fabrics and longer drops.
Fabric Choices for Apex Curtains
Large apex curtains require carefully selected fabrics.
Popular options include:
Linen Fabrics
Natural linen fabrics provide a soft relaxed look and work well in living areas.
Velvet Fabrics
Velvet adds luxury and helps absorb sound in large rooms.
Blackout Linings
For bedrooms with large apex windows, blackout linings help block early morning sunlight.
Measuring Apex Windows for Curtains
Accurate measurements are essential.
Key measurements include:
- Width of the window
- Height of the apex
- Angle of the slopes
- Desired curtain drop
Because apex windows vary greatly, most installations require professional measuring.
Installation Considerations
Installing apex curtains often involves:
- Custom track bending
- Secure ceiling or wall mounting
- Working at height
- Precise curtain positioning
For large installations, professional installers ensure the curtains open smoothly and hang correctly along the angled track.
Apex Curtains vs Apex Blinds
Some homeowners consider blinds for triangular windows.
However curtains offer several advantages:
| Curtains | Blinds |
|---|---|
| Better insulation | Limited insulation |
| Soft decorative appearance | More minimal look |
| Cover very large windows | Size limitations |
| More fabric choices | Limited materials |
For large gable windows, curtains are usually the preferred solution.
Common Rooms with Apex Windows
Apex curtains are commonly installed in:
- Living rooms
- Master bedrooms
- Loft bedrooms
- Barn conversions
- Modern extensions
- Stairwells
These installations often become a focal point of the room.
Choosing a Specialist Apex Curtain Installer
Because apex installations require specialist knowledge, it is important to work with experienced installers.
Look for companies that offer:
- Custom track bending
- Professional measuring
- Installation service
- Experience with triangular windows
Apex Curtains Across the UK
At Apex Curtains, we specialise in made-to-measure curtains for apex, angled, and triangular windows across the UK.
Our services include:
- Professional measuring
- Custom track manufacturing
- Fabric selection
- Full installation
If you have a gable end or triangular window, our team can help design a curtain solution that works perfectly with your space.
Speak to an Apex Curtain Specialist
Every apex window is different.
If you would like personalised advice for your project, our specialists are happy to help.
📞 Call 0800 772 0367
Our team can guide you through the best options for your window.
Frequently Asked Questions About Apex Curtains
Can you put curtains on a triangular window?
Yes. Curtains can be installed on triangular windows using custom bent tracks designed to follow the angle of the window.
What track is used for apex curtains?
Most installations use custom aluminium tracks or Silent Gliss tracks which can be bent to match the slope of the window.
Do apex curtains open fully?
Yes. When installed correctly, apex curtains open smoothly along the angled track and stack neatly to the sides.
Are apex curtains suitable for large windows?
Yes. Curtains are often the best solution for very large gable or vaulted windows because they can cover large areas of glass.