If your curtain designer has mentioned a covered lath and fascia, you might be wondering what on earth they are talking about. You are not alone: it is one of the most useful but least understood parts of a bespoke curtain installation. Here’s what it is, when it’s the right choice and when it isn’t, so you can talk it through with your designer with confidence.
By Katherine Brown · Updated 15 October 2026 · 8 minute read
Quick answer: A bespoke, minimalist piece of curtain hardware that hides the curtain track behind a slim, fabric-covered front panel.
It is perfect for:
The lath is made from timber and is attached to the ceiling or the wall, or can sit on top of the window frame.
The projection is tailored to clear any obstacles around the window, such as a deep windowsill, frame or radiator. The curtain track is top-fixed to the underside of the lath, and a slim 5cm flexible fascia is fitted to the front of the lath to conceal the track.
The fascia is simply a narrow, flat facing board. Think of it as the decorative front panel that covers the mechanics and gives the whole installation its clean, finished appearance.
The lath and fascia are either covered in the same fabric as the curtains, or in a contrast or plain neutral fabric.
The curtains sit in front of the lath, showing off the full beauty of the curtain heading. It is a sleek, contemporary alternative to a traditional pelmet, which hides the heading and can reduce light from the window. When the curtains are closed, the lath and fascia simply disappear behind them.
Quick answer: Yes. A covered lath and fascia is the ideal solution when you want the convenience of a corded track without the track itself on show.
Corded tracks can be bulkier than hand-drawn tracks, and while they look acceptable ceiling-fixed, face-fixing them above a window can spoil the overall look. Here a covered lath and fascia is perfect, particularly where there is not enough space for a pelmet, or where a pelmet would overpower the window detailing.
Corded curtain tracks are a sensible choice for hard-to-reach windows, bay windows with bends, and bedroom curtains where an overlap arm significantly improves blackout. If you are still deciding on hardware, see curtain tracks or poles.
Quick answer: In most cases, yes. A covered lath and fascia often works where other hardware, such as a pole, simply cannot.
Large bay windows benefit from the convenience of a corded track, especially where furniture in the window makes access difficult. Bay windows come in all shapes and sizes, and however tricky the configuration, a covered lath and fascia can often work where other options would not.
We see many bay windows with minimal space between the window frame and the cornice, which makes a pole impossible as there is no room for the brackets. A covered lath and fascia can slot into this tight space, with smaller hidden brackets giving a really neat, stylish finish where the curtains appear to drop straight from the cornice or ceiling.
The lath is made on site to fit the window, which makes it highly versatile. It can have a deeper board in the centre, for example to clear a radiator, and shallower boards at the sides to maximise space. Often sitting on top of the window architrave or frame, it also provides a very sturdy fixing for heavy lined curtains.
Katherine’s Key Takeaway
Bay windows are often where clients feel most stuck: a pole won’t fit and they assume there are no good-looking alternatives. A covered lath and fascia solves what feels like an impossible problem, and delivers a really beautiful, tailored result.
Covered laths are part of most of the made to measure curtains we fit, and they pair naturally with Roman blinds behind the curtain for blackout. Find your local page for Chelsea, Notting Hill, Hampstead or Wandsworth to see how we work in your area.
Quick answer: Yes, and the transformation can be dramatic. We regularly see it completely open up a window and flood a room with more light.
Unlike a traditional pelmet, a covered lath and fascia does not obscure any of the beautiful features of a window, whether that is an intricate window frame, a deep architrave or a stunning cornice.
Quick answer: Yes. When blackout is the priority, a corded track with an overlap arm inside a covered lath and fascia is the most effective solution available.
According to a YouGov survey, 34% of Britons said installing blackout curtains was one of the steps they took to improve their sleep. If you are among them, a covered lath and fascia is the hardware detail that makes that investment work as hard as possible.
The lath stops light coming over the top of the curtain track, effectively sealing the curtains at the top. It is also shaped so the curtains return neatly into the walls at the sides, giving close to complete blackout.
Katherine’s Key Takeaway
If you really struggle with early morning light, a corded track with an overlap arm inside a covered lath and fascia is the closest thing to complete blackout that still looks elegant. It is well worth the additional investment.
Quick answer: Yes. The lath depth can be tailored to fit two tracks, even on the most complex bay windows, so it is an excellent solution wherever double tracks are needed.
What Our Clients Say ★★★★★
Lots Of Helpful Advice
‘Lots of helpful advice regarding fabric choices and how to best reduce light infiltration. Fitting process was very smooth and the curtains are high quality and look lovely.’
Kate S, Google review
Quick answer: In a small number of situations it is not the right choice, and your designer will flag these early.
Quick answer: Almost certainly because they want your curtains to look their absolute best, and because it solves a specific problem with your windows or the look you want.
There are several situations where a covered lath and fascia is the right solution:
Quick answer: It does add to the overall cost, but the difference it makes to the finished result is usually well worth it.
The additional cost depends on whether it is for a straight or bay window, and the width of the window. I would always recommend asking your curtain designer to cost up both options, track only and track with covered lath and fascia, as it often doesn’t cost that much more given the improvement to the finished look.
Cutting this detail out to save money often means the rest of your investment in beautiful fabric and expert making doesn’t reach its full potential. For more on how costs work, see what affects the price of bespoke window dressings.
Katherine’s Key Takeaway
A covered lath and fascia is a truly bespoke piece, built for the window on site by specialist fitters, and the end result is spectacular. It can really enhance even the most awkward window.
What Our Clients Say ★★★★★
An Excellent Finish
‘The curtains and blinds we chose with her help provided an excellent finish to a huge 6 month building project and we couldn’t be happier with the final result!’
UBM, Google review
They are similar but not the same. A pelmet is a more substantial box structure that fully encloses the top of the curtain. A covered fascia is slimmer and sits flat, covering just the front of the lath. Fascias tend to look more contemporary and understated; pelmets are more traditional and formal.
Covered laths and fascias are very versatile, but some headings don’t work so well with them. More relaxed headings such as single pinch pleat and pencil pleat tend not to suit a covered lath. They generally look best with more structured headings such as double or triple pinch pleat.
Usually the same fabric as the curtains, which creates a seamless, matching finish. In some schemes a contrast fabric is used deliberately as a design feature.
Yes. Combined with a corded track and good quality blackout lining, a covered fascia is one of the most effective ways to stop light leaking over the top of the curtain. It is a much better blackout solution than a pole, which always leaves a gap above the curtain.
Katherine Brown began her career project managing major house renovations, giving her a rare mix of creative design ability and deep technical understanding of construction, hardware, motorisation and installation. For the last decade, Katherine and her team have delivered bespoke window dressings and soft furnishings for homes across London and the Home Counties, including large heritage properties, complex architectural spaces and full-house projects where every room demands a tailored approach.
She works with some of the UK’s most respected interior designers as well as private homeowners, and her work is recognised for its precision, considered detailing and a calm, collaborative design process rooted in trust and craftsmanship.
