How to plan a sun sail

1. Select attachement points

Choose the attachment points for your sun sail. Please remember that the walls must be suitable to attach the sun sail.

How to find the optimal attachment point for your sail

To shade your desired area, you have to find suitable attachment points.
Sun sails can be attached to house walls, special poles or even on rafters and balcony railings (if sufficient stability is provided).
Be cautious if you want to attach your sun sail to a wall. Depending on the material of the structure (concrete, bricks, etc.) appropriate mounting material is available at your local hardware store. An expert will assist you in making the right choice.

Important – Drainage!

There must be a declination of at least 30% between the highest and the lowest point in the direction of the water flow. This means 30 cm per 1 m distance.

So if the sun sail is 5 m in length, the height difference must be 150 cm.

A declination of 30% is necessary for the water to drain! If the sun sail is 5m in length, the height difference must be at least 150 cm!

Moreover experience showed that water drains best over a corner, not over the centre of the side edge. So it is best if you plan your sail with a corner as the lowest point to which the water can drain from all directions.

The lowest point is a corner. This way the water can drain easily.

What should you consider when choosing a location:

Research local building codes that may restrict or prohibit setting up sun sails.
Is the masonry suitable? Depending on the material of the structure, different hardware for attachement is required. In case of doubt, a specialty retailer or another expert should be consulted.
Are there any subterranean pipes or other obstacles that may prevent placing a concrete foundation for the poles?
Is the location exposed to extreme wind conditions? If sudden, strong winds occur frequently, you should use a mesh fabric and provide additional attachment points.

How many attachment points?

We recommend to plan for an attachment point every 3-5 m. This way even big sun sails with sides of up to 10-20 m can possibly be realised.

2. Simulate the sun sail

A simple string is used to simulate the side edges of the sun sail. Small nails can help to fix the string. Poles can be represented by wooden laths.

How to get a first impression of your sun sail

Suitable attachment points were found? Then now is the time to get a first impression of your future sun sail!
To do that, just tighten a string between the planned attachment points.
With this easy technique you are able to …
• see the shaded area of your sun sail.
• watch the route of the shade during the course of the day.
• make modifications to achieve the perfect route of the shade.


Whether sun-, wind or privacy protection:
CARAVITA sun sails offer numerous interesting possibilities!

Please note:
Try to achieve an identic match of the pulling direction and the bisector of the corner when you plan your sun sail (see sketch). This way tensile forces are distributed optimally across the sun sail and provide a flat and even surface.

Skizze Winkelhalbierende Mit Icons 1 300x197

3. Measure the sun sail

Determine the final measurements

Once you are sure to have found the right position for your sun sail, order and install the mounting accessories – e.g. wall brackets, poles, etc.
As soon as everything is installed, the final measurements of your sun sail can be taken. To do that, pull a string or a measuring tape through the attachment points. Adjust the turnbuckles to their maximum length and provide pulleys with sufficient scope to tighten afterwards. From this frame of strings, you can take the exact measurements of the sun sail.


Your measurements should be rather too short than too long. It is not possible to make oversized sun sails smaller. However, small sails expand over time. Until then an additional snap hook can bridge the distance.

These dimensiones are required:

Enter the measurements of your sail into a simple sketch. We will produce your sun sail according to this sketch. Deviations of up to 2% are possible during production.

Plan for scope!

Fabrics expand over time. To ensure the sail is taut and to provide rain protection, tensioning devices are used.
Therefore you should provide sufficient scope between sail and attachement point to install a turnbuckle or cable pulley.

Scope should be:
• For turnbuckles the maximum length of the turnbuckle.
• For cable pulleys about 5% of the side edge or the diagonal.

All three sides.

All sides and diagonals.

Five or more corners:
All sides and diagonals. If possible
even the heights of the attachment points.

4. We’ll take care of the rest…

What’s next?

Once you order, we will create a construction drawing of your sun sail based on the provided information. This drawing will serve as the basis for the production of your individual sail. If all of the dimensions and details in the drawing are correct, you can approve the drawing and have your sail produced.