Vertical blinds, and why they still win on big windows

89mm or 127mm: choosing the louvre width

89mm louvres are the standard domestic width, giving a finer, less chunky look that suits most homes and stacks back tidily at the side of a patio door. 127mm louvres are wider and were originally a commercial choice, but they're worth considering on very tall or very wide domestic openings because fewer, wider louvres can look calmer than a large number of narrow ones.

In offices and schools 127mm is still the common specification because it covers more area per louvre, which matters when a whole bank of windows needs dressing economically and durably.

Wand control vs chain control

A wand rotates the louvres and, with a light pull, draws the whole blind across, which is the simplest and most intuitive control for most households and keeps cords to a minimum. A chain-and-cord system gives finer control over the stack position and is still common in commercial settings where the blind is opened and closed dozens of times a day.

For any room used by children, wand control or a cordless motorised option is the safer choice, and we'll always talk through the safety implications of chain systems before fitting one where children are present.

Fabric options: blackout, dimout and voile

Voile and sheer louvre fabrics filter glare and soften a view while keeping the room bright, which suits a home office or a living room facing a busy street where you still want daylight. Dimout fabrics reduce light and add privacy without full darkness, and are the most commonly chosen fabric for living rooms and patio doors.

A full blackout louvre fabric exists too, though because verticals always leave a narrow gap where each louvre overlaps its neighbour, they will never achieve the same total darkness as a properly channelled roller or cellular blind. For a bedroom wanting true blackout on a wide window, we'd usually recommend pairing verticals with a supplementary blind or discuss cellular blackout as an alternative.

Patio doors and sliding doors

Vertical blinds remain the most practical answer to a patio door because the louvres stack fully to one or both sides, leaving the whole door free to open, and the blind can be operated with the door in any position without fabric catching in the track below.

Offices and schools

In commercial and school settings, vertical blinds are chosen for cost per square metre on large glazing, ease of replacing a single damaged louvre rather than the whole blind, and fabrics rated for fire retardancy where required. We work with local businesses and schools across east Kent on exactly this kind of larger-scale specification alongside our residential work.

Cleaning and everyday care

Vertical louvres wipe clean individually with a damp cloth, which is genuinely useful in a kitchen-diner with patio doors that pick up cooking residue, or in a school corridor where marks need removing quickly without taking the whole blind down.

What actually goes wrong with a badly specified vertical blind

The most common complaint we hear about existing vertical blinds isn't the look, it's the mechanics: louvres that twist out of alignment, a bottom chain that snags, or a track that sags in the middle of a very wide patio door because it wasn't supported at intermediate points. A weighted hem strip along the bottom of each louvre stops them swinging in a draught from an open door, and on any run wider than around two and a half metres we'd fit intermediate ceiling or wall supports to the track rather than leaving it to flex under its own weight.

Coastal properties along this stretch of Kent, from Folkestone seafront up to Whitstable, also see more fabric fade and cord brittleness than inland homes because of salt air and stronger UV bounce off the water, so a fabric with a proven UV-stable finish is worth asking for on any south or seaward-facing installation rather than assuming all vertical fabric performs the same over five years.

Conservatories and full-height glazing

Conservatories and orangeries with floor-to-ceiling glass are one of the settings where verticals continue to outperform almost every alternative, because the louvres can run the full height of the glazing without the bulk a stacked roller or cellular blind builds up at the top of a very tall drop. Heat gain is the practical issue in a conservatory more than light, and a reflective or foil-backed louvre fabric cuts a genuine amount of solar heat before it reaches the room, which matters on a glass box that can turn into a greenhouse by mid-afternoon in summer.