The right curtains for bay windows follow the shape of the bay instead of fighting it. That means a track bent to the exact angles of your window and a clear plan for where the fabric sits when it is open. A bay is often the window that sold you on the house, and it is also the one most homeowners leave bare the longest, because a straight rod and a pair of off-the-shelf panels do not work across three or five angled sections of glass. Below is how our designers approach a bay, from the hardware to the hem, so you know which option suits your window before anyone arrives with a tape measure.
Why a Bay Window Needs Its Own Curtain Plan
A bay window needs its own plan because the glass sits on two or more planes, and the curtain has to turn a corner wherever those planes meet. A flat window gives you a long wall for hardware and plenty of space on either side for the fabric to gather. A bay takes most of that away.
Before we talk about fabric, we look at the details that shape the whole design:
- Narrow mullions. The posts between the centre window and the side windows are often only 10 to 20 cm wide, so there is no room for fabric to stack between sections.
- Little wall above the frame. Many bays, especially in older Toronto houses, have just a few centimetres between the window trim and the ceiling. The track often has to mount to the ceiling itself.
- Something underneath. Radiators, heat registers, baseboard heaters and built-in window seats are all common below a bay, and each one changes the right curtain length.
- Opening hardware. The side windows in a bay are often casements with crank handles, and the track or a closed panel has to clear them.
Know Your Bay Shape Before Choosing Curtains for Bay Windows
The shape of your bay decides the hardware, so the first step is to work out which type you have. Most homes across the GTA have one of the four below, and each one calls for a different way of hanging curtains for bay windows.
| Bay type | Where you see it in the GTA | Best track approach | What to watch for |
|---|---|---|---|
| 45-degree bay (three windows, corners of 135 degrees) | Toronto’s bay-and-gable houses and the Victorian and Edwardian semis of Cabbagetown, Riverdale, Leslieville and the Annex | One continuous track bent to both corners | Plaster ceilings and floors that have settled over a century |
| 30-degree bay (corners of 150 degrees) | Shallower bays in postwar and newer homes | A continuous track with gentle bends that panels glide around easily | A wide centre window that makes a single panel long and heavy |
| Box bay (90-degree corners) | Front rooms and breakfast areas in 1990s and 2000s subdivisions in Markham, Vaughan, Oakville and Mississauga | A track inside the box on all three sides, or a straight track across the opening | Very narrow side windows and, sometimes, a lowered ceiling inside the box |
| Bow window (four to six sections in a curve) | Living rooms in many 1970s and 1980s homes | A curved track, or one with several small bends | More segments to measure, so small errors add up |
It is normal not to know your angles. Older bays were built by hand and rarely land exactly on 135 degrees, which is one reason we measure them on site instead of working from a sketch.
Track or Rod: Mounting Options That Work in a Bay
For most bays, a single continuous track bent to the angles of the window gives the cleanest result. The panels glide around the corners and close as one unbroken run of fabric. It is not the only option, though, and each of the alternatives makes sense in the right house.
Continuous Bent Track
A slim metal track is bent to the measured angle of each corner and mounted to the ceiling or to the wall just above the frame. Carriers inside the track pass smoothly around each bend, so a pair of panels can open from the centre and travel all the way to the outer ends of the bay. Brackets go roughly every 60 to 80 cm, with one close to each side of every bend, since the corners take the most strain when the curtain is drawn. The track also has to sit far enough forward to clear casement cranks and window locks. This is our usual recommendation for curtains for bay windows, because it is the only approach that lets one curtain close the whole bay with no gaps at the corners.
Decorative Rod With Corner Connectors
Wood or metal rods joined with angled elbow connectors suit a traditional room, particularly in a Victorian or Edwardian home where a visible rod and finials feel right. The trade-off is movement. Standard rings cannot slide past a support bracket, and every corner needs one, so each section gets its own panels or the panels stay stationary. You keep the look of a classic rod, but you lose the single sweeping draw.
A Straight Track Across the Opening
Here the track does not follow the bay. It runs straight across the opening on the room wall. When the curtains are closed, the bay becomes an alcove behind them, and when they are open, the whole bay is on show. This works well for shallow box bays and for bays with a window seat you want to keep as a separate nook. In winter it also keeps the colder air of the bay out of the room. The catch is that you need enough wall on either side of the opening for the fabric to stack. A heat register inside the bay will also warm the alcove rather than the room.
We rarely suggest a separate straight rod on each window. They leave light gaps at every corner, and the brackets and finials crowd each other on narrow mullions.
How to Measure Curtains for Bay Windows Accurately
Measure each section along the line where the track will sit, not across the glass, and record the angle of every corner. That line is exactly what the fabric has to cover. This is the order we follow on site:
- Decide the mounting position first: ceiling, wall above the frame, or across the opening. Every other number depends on it.
- Measure each segment along that line from corner to corner, then add how far you want the track to extend past the bay at each end.
- Record each corner angle with a digital angle finder or a cardboard template. Do not assume 135 or 150 degrees.
- Measure the drop from the track position to the floor or sill at both ends of every section. Floors in older homes often slope, and a difference of 1 to 2 cm across a bay is common.
- Note anything in the way, such as crank handles, radiators, registers, seat cushions or alarm sensors.
The amount of fabric comes from the total track length, bends included. Pinch pleat curtains usually need two to two and a half times that length in fabric width, so a bay with 330 cm of track needs between 6.6 and 8.25 metres of finished fabric width. Keep that weight in mind before you fall for a heavy interlined fabric, because the track and brackets have to carry all of it around the corners.
Choosing the Length of Curtains for Bay Windows
Floor length, with the hem floating about 1 cm above the floor, looks the most tailored and keeps the room warmest. Puddled hems are a poor match for a bay, since panels that travel around corners drag and bunch at the bends. If something sits below the bay, sill length (ending about 1 cm above the sill) or apron length (10 to 15 cm below the sill) keeps the fabric clear. With a window seat, a curtain that stops just above the cushion lets you use the seat while the curtains are closed. With a register, the aim is to keep warm air flowing into the room instead of trapping it between the fabric and the cold glass.
Stack-Back: Where the Fabric Goes When the Curtains Are Open
Open curtains need a place to gather that does not cover the glass, and in a bay the narrow mullions between sections are rarely wide enough. This space, called the stack-back, is the step most often skipped, and it decides how much daylight you keep.
As a rule of thumb, a pleated curtain stacks to roughly a third of the track width it covers. Take a 45-degree bay with a 150 cm centre window and two 60 cm side windows. Following the bay, that is 270 cm of track. If you extend it 30 cm past each outer corner onto the room wall, you have 330 cm, which stacks to about 110 cm, or 55 cm on each side. Thirty centimetres of each stack sits on the wall, and roughly 25 cm still covers part of each side window.
When the stack would cover too much glass, curtains for bay windows can be planned in one of these ways:
- Extend further. Run the track farther onto the room wall, if the wall space and furniture allow it, so the whole stack clears the glass.
- Split at the corners. Give each section its own pair of panels so the stacks are smaller, knowing they will cover the edges of each window.
- Lighten the stack. Choose a ripplefold heading or a lighter fabric. Both gather more compactly than heavy pinch pleats.
- Go stationary. Hang fixed panels at the outer ends to frame the bay, and control light with a blind inside each window.
Heading Styles That Turn Corners Well
Ripplefold and pinch pleat headings both work well in a bay. Grommet and rod pocket headings are best kept for panels that do not move.
Ripplefold
Ripplefold fabric snaps onto carriers spaced evenly along the track, which gives soft, even S-shaped folds. Because the track sets the spacing, the folds stay consistent as the curtain travels around each bend, and the stack is compact. It looks clean and contemporary, so it suits box bays in newer homes and any room with a modern style.
Pinch Pleat
Pinch pleats are the traditional choice and look at home in a Victorian or Edwardian bay. On a bent track, we space the pleats so that a pleat, not a flat stretch of fabric, lands at each corner. That small detail stops the curtain from flattening or gaping at the bend when it is closed. Pinch pleat curtains for bay windows also handle heavier, interlined fabrics well, which helps in a cold room.
Grommet headings need a round rod and cannot pass a corner bracket, so we only use them on fixed panels. For fabric weight, lining and opacity, our page on custom drapery made for your windows covers the full range, so this post stays focused on the bay itself.
Keeping a Bay Warm Through a GTA Winter
Lined, floor-length curtains for bay windows, closed at night, are one of the simplest ways to cut the chill a bay brings into a room during a Toronto winter. A bay puts more glass in one spot than any other window in the house, and in older homes the small roof and floor of the bay are often poorly insulated. Cold glass chills the air next to it. That air sinks and rolls across the floor as a draft you can feel from the sofa.
A thermal lining adds a real barrier, and interlining adds more. Interlining is a soft flannel layer sewn between the face fabric and the lining. Mounting the track to the ceiling, or adding a top cover above it, limits the cold air that circulates down behind the curtain. Bringing the outer ends of the track back to the wall does the same at the sides. Natural Resources Canada makes the point throughout its home energy efficiency guidance that windows are among the weakest points in a house’s thermal envelope. A well-sealed curtain in the room with the most glass makes a noticeable difference.
Condensation is the other winter issue. Fabric pressed against cold glass can stay damp, so leave a few centimetres between the curtain and the window, and open the curtains on sunny days so the glass can dry. Canada Mortgage and Housing Corporation has long advised homeowners to keep indoor humidity in check to limit window condensation. That advice matters more in a bay than anywhere else in the house.
Layering Blinds and Curtains in a Bay
Many bays work best with a blind inside each window for daily light and privacy, plus curtains for warmth and softness, because each blind controls its own section. This matters in the street-facing front bays common on Toronto semis, where you may want privacy on the centre window and full daylight on the sides at the same time. Roller blinds sit flat and slim behind the curtain line, and motorized zebra blinds let you switch between view and privacy without raising the blind. Before planning an inside mount, we check the depth of the frame and make sure crank handles will not block the blind.
Layering also lets the curtains for bay windows stay simpler, often as heavier stationary panels at the ends instead of one long working curtain. If your bay is wide enough that one panel has to travel around two corners, a motor on the track saves pulling all that fabric by hand. Our page on smart motorized blinds explains what automation involves.
What We Check During an In-Home Bay Window Consultation
A bay is the one window where a site visit matters most, because the angles and the ceiling structure vary from house to house. During a consultation, our designer measures every section along the planned track line, records each corner angle, checks what the ceiling or header can support, and notes anything below the bay that affects curtain length. In older homes we also check for plaster and lath, which needs different anchors than drywall. You see track, heading and fabric samples against your own window and light, which is the only reliable way to judge them.
At Ava Window Fashions, we measure and install across Toronto and the surrounding region. You can see the full list of areas we serve across the GTA. Every set of made-to-measure drapes and curtains we make for a bay is built to those site measurements, so the track fits each angle and the hems sit level even when the floor does not.
Plan Your Bay Window Curtains With Ava
The best curtains for bay windows start with an accurate measure of every angle, so the next step is a visit to your home. Book a free in-home drapery consultation, and our designer will measure each section of your bay, confirm the corner angles and bring track options and fabric samples to your window. You will see how the folds and the stack will look before anything is made. Browse our custom drapery and curtain collection to start shortlisting heading styles, then book your free in-home consultation and we will plan the bay with you, corner by corner.
Frequently Asked Questions
What kind of track or rod works best for curtains for bay windows?
Most bay windows suit one of two systems: a track custom-bent to follow the exact angles, or a jointed rod with angled corner connectors. A bent track with corner-passing brackets lets panels glide around the bay in one pull. A jointed rod gives a more decorative look but usually splits the curtains into separate sections. Your bay angles and ceiling height decide which one fits.
Should bay window curtains be one continuous panel or separate panels for each window?
Many GTA homeowners choose separate panels: a pair at the outer ends plus a panel at each corner, so the centre window can open for light and views while the sides stay dressed. One continuous run of fabric on a bent track looks cleaner when fully closed but needs more room to stack back. An Ava designer can show both layouts on your actual bay.
Why does a bay window need to be measured differently from a flat window?
Each section of a bay sits at its own angle, and many bays are not perfectly symmetrical, so one overall width will not give a proper fit. Accurate curtains for bay windows need every wall section, corner angle, ceiling height and stack-back clearance recorded. Ava's in-home consultation covers this across Toronto and the GTA, with measurements taken on site so the track and fabric are made to fit.
Can bay window curtains work around a window seat or a radiator?
Yes. Where a bay has a window seat or a radiator under the sill, curtains are usually made sill length or finished just above the seat so fabric does not bunch or block heat. Floor-length panels can still hang at the outer ends of the bay. Mounting the track on the ceiling or high on the wall draws the eye up and makes the bay feel taller.
