A sliding door blind has to clear the door as it opens, cover a span most windows never reach, and survive being touched every day. Vertical louvres are the default because they stack tight to one side; wide rollers and panel systems are the alternatives. Free measure and quote — call 081 411 8471.
The Options, Ranked by How Often They Work
| Option | Stack | Max practical width | Watch out for |
|---|---|---|---|
| Vertical louvres | Tight, to one or both sides | ~4,000 mm | Louvres swing in a draught |
| Panel / track | Flat panels sliding behind each other | ~4,500 mm | Stack sits over part of the glass |
| Single wide roller | Rolls up above the door | ~2,700 mm | Tube sag on long spans |
| Two or three rollers | Above the door, split | Unlimited in sections | Visible gaps at each join |
| Venetian | Bulky stack at the top | ~2,400 mm | Slats rattle against a moving door |
Why Verticals Still Win Most Patio Doors
A vertical louvre blind stacks into roughly 150–250 mm at one end of the track, which means the whole door opening is usable. It also tilts, so you get the light control of a venetian with a stack that goes sideways instead of down. On a 3,000 mm stacker door nothing else does both. See vertical blinds.
Clearing the Door
The single most common error is fitting inside the reveal on a door that opens inward or has a protruding handle. Face fitting above the frame, with the stack landing clear of the moving panel, avoids it. Allow at least 70–100 mm of overlap each side and enough height above the frame for the headrail plus stack.
Wind, Which Is the Cape Town Problem
An open patio door in a south-easter turns a vertical blind into a wind chime. Two fixes work: a weighted bottom chain linking the louvres so they move as one, or choosing a panel system where flat panels have far less to catch. If the door is on an exposed elevation, mention it at the measure — it changes the specification.
Blockout on a Patio Door
Sliding doors are usually the largest glass in the house and often face west, so heat is the real brief. A blockout roller with a pale reflective backing performs best thermally, split into two or three sections to keep each tube short. The mechanism is covered in how blinds cut solar gain, and the fabric families in blockout vs dim-out vs sunscreen.
Frequently Asked Questions
What is the best blind for a sliding door?
Vertical louvres, in most cases. They stack tight to one side so the doorway stays usable, and they tilt for light control. Panel systems are the alternative on very wide openings.
Can you fit a roller blind on a patio door?
Yes, up to about 2,700 mm in a single blind. Past that the tube sags visibly and the door is better covered by two or three rollers side by side, or by verticals.
Will the blind stop the door opening?
No, provided it is face fitted above the frame with the stack landing clear of the moving panel. Fitting inside the reveal is what causes the problem.
Get a Free Measure & Quote in Cape Town
Window Blinds Cape Town measures, manufactures and installs across the metro. Call 081 411 8471 for a free on-site measure and quote, or browse the other blind guides.