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Side awning vs shade sail

Updated: 22.10.2026

The patio is hot at lunchtime and overlooked from the side in the evening, and you are about to buy whichever listing says awning first. A side awning and a shade sail do different jobs. One is a vertical screen you can roll away. The other is a tensioned roof that needs anchors and a fall so rain runs off. Product rows stay on the [side awning comparison](/hub/sun-shades/side-awning). This page uses the British Blind and Shutter Association's note on low sun, a UK sail fitter's slope guidance, and the Planning Portal's split between a freestanding structure and an awning fixed to the house. We did not test a sail here, and we will not give one a UV percentage.

The patio is hot at lunchtime and overlooked from the side in the evening, and you are about to buy whichever listing says awning first. A side awning and a shade sail do different jobs.

Our top picks

VOUNOT VOUNOT brown side awning, 140 × 300 cm

Best overall

VOUNOT VOUNOT brown side awning, 140 × 300 cm
9.0/10about £59.99
View offer
VOUNOT VOUNOT grey side awning, 140 × 300 cm

Preis-Tipp

VOUNOT VOUNOT grey side awning, 140 × 300 cm
9.0/10about £56.30
View offer
VOUNOT VOUNOT vertical awning, 200 × 310 cm

Alternative

VOUNOT VOUNOT vertical awning, 200 × 310 cm
8.6/10about £54.92
View offer
On this page
  1. 1.Two different jobs
  2. 2.Sun, privacy, and rain
  3. 3.Anchors, retracting, and permission
  4. 4.Which one you buy for which sun

Two different jobs

A side awning, as kept in this comparison, pulls out from a cassette or drops between poles. The three VOUNOT cassettes are titled 140 cm high and 300 cm long. The fourth product is a 200 cm blind with poles from 220 cm to 310 cm. You use them to block a neighbour's window, a side breeze, or sun that arrives low and sideways. You retract them when you want the view back. They do not cover the sky. A shade sail is cloth held in tension over your head. Clara Shade Sails, writing for UK installs, treats it as a small roof: posts, fixings that can take wind, and a fall so water does not pool. It is a poor tool for a neighbour's window unless the cloth happens to hang in that sightline. Measuring a cassette is the side awning buying guide.

Sun, privacy, and rain

Overhead sun in the middle of the day is a sail, or a roof awning, because the cloth has to be above you. The British Blind and Shutter Association says low sun is what side screens are for. Infinity Awnings makes the same point for a west-facing patio: a roof lets the evening sun underneath. A 140 cm cassette can cut that low beam while you sit. A neighbour looking at the chairs is a side-screen problem, and UK reviews say the cloth can look see-through with the sun behind it. Clara's notes ask for a slope of about 20–30 degrees so rain runs off. Cassette bullets claim protection from water and state no waterproof rating. The vertical blind limits itself to light rain on 180 g/m² PU-coated polyester. You ease a sail down in a gale because the anchors are holding a large cloth.
VOUNOT VOUNOT brown side awning, 140 × 300 cm

Testsieger

VOUNOT VOUNOT brown side awning, 140 × 300 cm
9.0/10about £59.99
View offer

Anchors, retracting, and permission

A cassette needs a solid end and a receiving post. A sail needs several strong points and a fall across the span. shade-sails.co.uk notes that many clients do not seek consent and that the firm is not giving legal advice. The Planning Portal is the better source in England: a freestanding structure is often an outbuilding, and an awning fixed to the house is an alteration, not Class E. Flats sit outside householder rights entirely. You can use both when you have both problems and you may support both structures: a sail for noon, and a 140 cm cassette for the evening window. One parcel does not do both. On a rented balcony, a sail's wall anchors are the wrong default. A qualifying purchase through our links can earn a commission at no extra cost to you.

Which one you buy for which sun

Buy the side awning when the problem is a neighbour's window or low evening sun you want to roll away. Buy the sail when the problem is noon shade and you can give the cloth posts and a fall. A roof awning is the other overhead type, and it is not one of the four listings here. On a balcony where drilling is forbidden, refuse the sail's wall plates and the cassette screws.

Common questions

Which one blocks a neighbour's window?
The side awning does, if it stands in the sightline. The cassettes here are 140 cm, so they cover a seated person. A sail overhead does not block that window unless it droops into the view, which fights the slope you need for rain.
Which one shades the table at noon?
The sail does, when it is rigged above the table with a fall so rain can leave. A side awning leaves the zenith open. A 300 cm cassette along one edge shades a strip when the sun is low and leaves the middle exposed at midday. If you cannot fit sail anchors, look at a roof awning on the awning comparison.
Can a shade sail stop low evening sun?
Poorly, on a west-facing patio. Overhead cloth lets the low sun underneath, which is Infinity's point and the British Blind and Shutter Association's point about side screens. Dropping a corner to chase that angle fights the 20–30 degree fall Clara wants for rain. A vertical screen on the sun's side is the cleaner match. Retract it when you want the garden back.
Which one do you take down in a gale?
Both, if you like the posts you have. Fold the side screen away in moderate or strong wind and keep hold of the spring. A sail has no cassette, so you ease the tension and get the cloth down, which wants a second person on a large span. This page does not invent a miles-per-hour rating for either.
Does a sail need posts and a slope?
Yes, unless the walls you already have are strong enough and in the right places. Clara's notes expect posts and a fall of about 20–30 degrees so rain runs off. A side awning is one cassette and one receiving post. The slope question does not apply to the cassette.
Which is easier on a rented balcony?
The pressure-fit blind, with a soffit and written consent, is the shape that avoids holes. A sail's anchors and a cassette both mean screws in walls you may not own. Flats do not get householder permitted development. If there is no soffit, a railing mesh still belongs in the lease check.

Related pages

How to fit a side awning

Side awning for a balcony

Side awning

Best side awning for patio or balcony comparison 2026

Retractable side awning height and gap comparison 2026

Sources

Public UK sources and the amazon.co.uk listings compared on this page. Updated 22.10.2026.

  1. Planning Portal: awning and gazebo FAQ (retrieved 22.10.2026)
  2. Planning Portal: fences, gates and garden walls (retrieved 22.10.2026)
  3. GPDO 2015, Schedule 2, Part 2, Class A (retrieved 22.10.2026)
  4. GOV.UK: permitted development rights for householders (retrieved 22.10.2026)
  5. BSI: BS EN 13561:2015 (retrieved 22.10.2026)
  6. Regulation (EU) 2019/1188, wind-class pressures (retrieved 22.10.2026)
  7. GOV.UK: General Product Safety Regulations 2005 (retrieved 22.10.2026)
  8. amazon.co.uk search: Retractable Side Awning (retrieved 22.10.2026)