To determine the ideal height for your shade sail, you will need to consider the sunshine depending on the seasons. You will also need to provide a difference in height between the different ends of your canvas, to allow the flow of water (especially for waterproof sails). In any case, you will avoid positioning the shade sail too close to the ground, to allow the air to circulate more freely and to avoid choking under the canvas.

How to determine the covered area according to the height of the shade sail?

You have already determined the location and dimensions of your shade sail. However, depending on its height, the covered area (the one that will remain in the shade), will not be identical.

Most of our masts are 2.60 m high. Put them in place and stretch a rope between them. You will be able to observe where the shadow zone will stop, and this throughout the day. Make simulations by changing the height of this string to determine which one will best meet your needs.

Once the sail is installed, however, you can still change its height, thanks to the slides that we provide in our kits.

How to tilt your shade sail?

A shade sail will be exposed to the rain. To avoid the appearance of pockets of water, which could damage it, you will have to respect a slope of the order of 20 to 30%. This means that the lowest point of your sail must be 20 to 30% closer to the ground than the highest point.

From a practical point of view, this inclination represents 20 to 30 cm per meter. If your shade sail is 4 m long, the difference in height will be 80 to 120 cm in total.

The flow of water will be facilitated if the slope is towards a peak: you can play with the heights on a square sail, to direct the flow to a specific place.

The stability of the anchor point will guarantee that of your shade sail. If you use buried masts, you will have to respect the rule of 2 / 3-

  • One-third of the length under the ground (In the case of a sealing it is necessary to count the height of the concrete mass)
  • Two-thirds outside.

Remember to incorporate these measures when buying your masts to ensure a sufficient slope to your canvas, especially if one or more of the areas of attachment are on your house.

How well to predict its fixing points to adjust the height of its shade sail?

If the triangular shading sails, of medium size, only need three anchor points, it will be necessary to multiply them for larger size canvases. For added security, provide attachment points up to 7.5 m away. Remember to reduce this distance if your area is exposed to strong winds and favor triangular sails.

If you plan to use your own frame as an anchor, use only suitable fastening material on the surface to be excavated

  • A short or long wall mounted concrete; for concrete, stone or brick.
  • A short wall fixture or long wood; on wooden beams or wooden cladding (at the structural elements of the cladding)
  • A double skin wall mount will hang in a wall with exterior insulation.

Also check for strength: a brittle chevron may not be able to withstand the pressure of a windswept sail.

Do not place your shade sail too low, so you can move under it without having to lean, but also have enough volume to move the air unhindered.

To read also: How to fix a shade sail without drilling?