Two curtains can reach the same floor yet look completely different. One falls in generous, even folds, framing the window beautifully. The other stretches flat across the glass or bunches awkwardly against the wall. With floor to ceiling curtains, the difference comes down to three decisions: track height, track width and fabric fullness.
This guide explains how to measure beyond the window frame, position your curtain track and achieve the right floor clearance while avoiding common fitting mistakes.
Before Measuring, Understand What You're Actually Measuring
Getting floor to ceiling curtains right requires three measurements, not just the window’s height and width.
- Track width: The total horizontal span, including extensions beyond the window for curtain stacking.
- Curtain drop: The finished length from the specified track or heading reference to the intended floor clearance.
- Curtain fullness: The additional fabric width needed to create natural, evenly spaced folds when closed.
Track width isn’t fabric width. A 2-metre track may require considerably more fabric to achieve the desired fullness. Finalise your track position before calculating curtain drop or fabric quantity. Marvel Blinds’ custom-made curtains can then be specified to suit your window dimensions and preferred finish.
How High Should You Hang Floor-to-Ceiling Curtains?
For a seamless full-height look, position the track at or near the ceiling, provided secure fixings and adequate clearance are available. Wall-mounted tracks above the window offer a practical alternative.
Ceiling-Mounted vs Wall-Mounted Curtain Tracks
- Ceiling-mounted: Secured to suitable structural support, the track creates an uninterrupted drop, particularly effective in rooms with high ceilings.
- Wall-mounted: Brackets positioned approximately 100–150 mm above the architrave can achieve a similar effect where space permits.
In Perth homes, cornices, bulkheads and ceiling heights can influence the final placement of floor to ceiling curtains.
What If There's a Cornice, Air Conditioner or Bulkhead?
The highest mounting position isn’t always the most practical. Decorative cornices, split-system air conditioners, vents and bulkheads can obstruct curtain tracks or prevent fabric from moving freely.
For floor to ceiling curtains, consider:
- Wall-mounted tracks: A practical alternative when ceiling obstructions restrict placement.
- Concealed tracks: A cleaner finish when planned into renovations or new builds.
- Clearance: Enough space for curtains to stack and move without catching nearby fittings.
Ceiling-height placement is a design preference, but secure fixing into suitable structural support is essential.
How Wide Should Floor-to-Ceiling Curtains Extend Beyond the Window?
Track width determines how much glass remains visible when curtains are open, not just their appearance when closed.
Window-to-Window or Wall-to-Wall Curtains?
- Window-framing: Start 100–200 mm beyond each side; this may not fully clear the glass.
- Wall-to-wall: Creates a continuous curtain backdrop.
- Extended track: Provides extra room for fabric to gather beyond the window.
Don’t Forget the Stack-Back Allowance
Stack-back is the space gathered curtains occupy. Heavy linings, generous fullness and heading styles affect it. Centre-opening curtains stack at both ends; one-way curtains gather at one. Plan stack-back before ordering floor to ceiling curtains.
How Full Should Floor-to-Ceiling Curtains Be?
Curtain fullness is the ratio between the flat fabric width and the finished curtain track width. It determines how generously the fabric folds when closed. For floor to ceiling curtains, too little fullness can leave panels looking stretched, while excessive fabric creates unnecessary bulk.
Understanding 1.5×, 2× and 2.5× Fullness
Different fullness ratios create noticeably different results:
- 1.5× fullness: Creates lighter gathers and a relatively flat appearance, particularly across wider windows.
- 2× fullness: Produces fuller, more defined folds, offering a balanced appearance for many curtain styles.
- 2.5× fullness: Creates generous folds and a richer fabric appearance, where the heading system supports it.
For example, a 2.4-metre track at 2× fullness requires approximately 4.8 metres of flat fabric before construction allowances. These ratios are guidelines, not fixed rules. Fabric weight, heading construction and track systems influence the final result. S-fold curtains, in particular, require fabric allowances matched to their carrier spacing. For a closer comparison, explore the different curtain heading styles and how they affect fabric fullness.
Should Long Curtains Touch the Floor, Float Above It or Puddle?
The final few millimetres can change how floor to ceiling curtains look and function. Your preferred hem finish determines the curtain drop and how the fabric interacts with the floor.
Floating Curtains – A Practical Everyday Finish
Floating curtains typically finish 5–15 mm above the floor, depending on the track system. This small clearance allows smooth movement, easier vacuuming, and less wear along the hem.
Curtains That Just Touch the Floor
A just-touching hem creates a clean, tailored appearance without fabric pooling underneath. However, uneven floors can make some sections touch while others sit slightly higher. This is also worth considering when comparing custom versus ready-made curtains, particularly when standard drops cannot achieve the intended finish.
Puddled Curtains – When Extra Length Makes Sense
Puddled long curtains deliberately extend onto the floor, creating relaxed, generous folds. If you’re considering linen curtains, account for their natural creasing and how the fabric behaves around the hem. They require more cleaning and are less practical near sliding doors, pets or busy walkways.
Why You Must Measure the Drop in Three Places
Measure from the specified track reference to the finished floor at the left, centre, and right. For floating curtains, the shortest measurement helps prevent dragging. Final deductions must follow the manufacturer’s heading and track specifications.
What Should You Check Before Hanging Curtains From the Ceiling?
Even perfectly measured floor to ceiling curtains can operate poorly if the track lacks secure support or sufficient clearance. Before installation, check three essential details.
Check Ceiling Fixings Before Choosing a Track
Hanging curtains from the ceiling requires suitable structural fixing points. Plasterboard lining alone may not safely support heavy curtains.
Check for ceiling joists, structural supports, or prepared timber blocking. Wide, lined or motorised curtain systems may require additional support based on their weight and track specifications. Marvel Blinds’ custom curtain track systems can be specified for different ceiling heights, window spans and mounting conditions.
Allow Enough Depth for the Curtain Folds
Position the track far enough from the wall to allow fabric to hang and move freely.
Check for obstructions such as:
- Protruding window handles and windowsills.
- Sliding-door frames and hardware.
- Existing blinds or other window furnishings.
Double-track arrangements need additional depth to prevent curtain layers from rubbing together. If you’re combining different window coverings, our guide to layering sheer curtains with blinds explains how to coordinate the treatments.
Decide How the Curtains Will Open
Centre-opening curtains gather at both ends, while one-way curtains stack on a single side. For Perth homes with sliding doors, position the curtain stack away from the frequently used doorway to maintain convenient access. Where space is limited, panel glide blinds for wide openings may offer an alternative worth considering.
Get the Measurements Right Before the Curtains Are Made
The difference between curtains that simply fit and curtains that hang beautifully comes down to careful planning. Track height determines the visual flow, width provides stacking space, fullness creates balanced folds, and floor clearance ensures smooth everyday operation.
With floor to ceiling curtains, even a few centimetres can change the finished result. Getting these measurements right before manufacturing avoids awkward gaps, unnecessary fabric bulk, and costly adjustments. Planning custom curtains for your Perth home? Book a free measure and quote with Marvel Blinds and get expert guidance on achieving the right fit for your space.
Frequently Asked Questions
Floor-to-ceiling curtains look best when the track is installed at or near the ceiling, provided there is sufficient clearance and secure structural support. If ceiling mounting is not practical, a wall-mounted track approximately 100–150 mm above the window architrave can be an alternative.
For window-framing curtains, extend the track approximately 100–200 mm beyond each side of the window. Wider tracks can help the curtains stack away from the glass when open, allowing more natural light into the room.
The fabric quantity depends on the track width, desired fullness, heading style and fabric construction. As a general guide, a 2.4-metre track at 2× fullness requires approximately 4.8 metres of flat fabric before construction allowances.
A 2× fullness ratio is a useful starting point for balanced, defined folds. A 1.5× ratio creates a lighter, flatter appearance, while 2.5× fullness produces richer gathers. The ideal ratio depends on the fabric and curtain heading style.
Floor-to-ceiling curtains can float slightly above the floor, just touch it, or puddle for a decorative finish. A clearance of approximately 5–15 mm is a practical choice for everyday use, helping reduce dragging and making vacuuming easier.
Yes. Ceiling-mounted curtain tracks can create a seamless, full-height appearance. However, the track must be secured to suitable structural support, such as ceiling joists or prepared timber blocking, especially for heavy, lined or motorised curtains.
Measure vertically from the specified curtain track or heading reference to the floor at three points: left, centre and right. For floating curtains, the shortest measurement helps prevent the fabric from dragging. Apply the final deductions according to the track and heading specifications.
Yes. Floor-to-ceiling curtains can make a room feel taller by creating an uninterrupted vertical line. Choosing a track that extends beyond the window and a suitable fabric fullness can also help the window appear wider.
Consider ceiling height, cornices, bulkheads, air conditioners, window handles and available fixing points. These features can affect track placement, fabric movement and the final curtain drop. Careful measuring helps ensure a practical, well-fitted finish.
Custom-made curtains can be tailored to your exact track width, drop, fullness and preferred heading style. Ready-made curtains may be suitable for standard windows, but custom options offer greater flexibility for full-height windows and non-standard dimensions.