A shade sail is not oriented solely based on North, South, East, or West. The deciding factors are when and where shade is needed, how high the mounting points are, and whether the sail should also provide protection from rain. Proper orientation is therefore a combination of the sun's path, geometry, and installation.
First, determine the desired usage time
Anyone having breakfast on the balcony in the morning requires a different shade position than a family using the dining area in the afternoon. Observe the area on sunny days during the relevant times. Mark where the table, seating, and walkways are, and how the shade shifts.
Treat south, west, and east-facing locations differently
For a south-facing terrace, the sun is relatively high at midday. A sail over the seating area can be effective then. The western sun is lower in the afternoon and hits the area from the side; the sail may need to extend further towards the sun or be positioned lower on one side. The same applies to east-facing locations in the morning.
However, the compass direction alone is not enough. The season, buildings, trees, and neighboring structures change the actual path.
Mounting height influences the shade
A high-mounted sail creates headroom and feels open, but allows more side light under the canopy when the sun is low. A lower point can extend the shade. However, it must not obstruct walkways or doors.
Therefore, plan the height in conjunction with the desired area. The article on the correct shade sail size shows why outer dimensions and shade are not identical.
Incorporate a slope for waterproof sails
For a waterproof shade sail, the orientation must also determine the water runoff. The lowest corner should be at a point where rain can drain in a controlled manner – not over a door, seating area, pathway, or neighboring property. A horizontal surface encourages water pooling.
Further information can be found in our guide What slope does a waterproof shade sail need?.
Adapt the shape to the orientation
A rectangle often covers a dining table evenly. A triangle can provide a targeted shade accent, but leaves more peripheral areas exposed with the same outer dimensions. A trapezoid can be useful if the facade and garden edge are not parallel.
Choose the shape based on attachment points and the goal of the shade. Our shape guide helps with the selection.
Do not use wind direction as the sole basis for planning
Local wind currents change due to buildings, hedges, and gusts. A sail cannot simply be "turned out of the wind." Decisive factors are load-bearing attachment points, proper tension, and the ability to take it down in good time during high winds. Read more about this under Shade sails in wind and storms.
Practical test before installation
- Mark the desired seating area with chalk or objects.
- Connect potential attachment points with a string.
- Observe the shade during the most important usage times.
- Provisorily vary the heights.
- If using for rain protection, determine the lowest drainage side.
- Only then measure the distances and diagonals.
The article How to measure shade sails correctly explains how to arrive at the right finished size from your attachment points.
With a custom-made UNICOVR shade sail, the shape and dimensions can subsequently be adapted to your established orientation.
Conclusion: Orient the sail based on the actual usage time and shade zone. Compass direction, height, slope, and shape must work together.