There are two ways to approach this:
There are lots more pergola kits using fabric now, some with a very modern feel. We'll look at some in a while, but let's start off with the DIY option...
What we'll need to do first is source a track runner system to fit underneath the side support rafters. Its important that we're able to attach rigid rods securely to the sliding mechanism carriers that hang below the track.
Here are some to give an idea. These particular ones come in a round or rectangular design that is mounted from the top, although we could attach side runners on to the side beams of the pergola as well.
We'll need two of these; one for each side.
In the picture, the curtains are hanging straight down from the track. However, for our canopy, we will attach the material to aluminium rods (see diagrams below) and then attach these rods, at right angles, to the tracks by hooking them through the eyes of the button carriers on one side of the pergola to the button carriers on the opposite side. They can also be attached with some sort of hoop or hook if the rod is too big for the carrier.
I've chosen these as an example, as they come in various lengths ranging from 140cm (4ft 7") increasing every 20cm to 300cm (9' 10"), although any non-rusting glider system, with button carriers, will do. Of course, you will be able to cut them down to exactly the correct length, if you wish.
We will need 4 to 8 rigid rods (depending on the size of our pergola) that will neither bend or rust. These rods are passed through a looped circle that we've stitched into the canvas.
The first diagram is the correct way to attach this type of canopy. Notice how the fabric drapes between the poles.
Space the materials hoops, through which we'll push the rods, equally along the length of the fabric. Obviously we will need two of these rods at the ends, unless we're having a decorative panel (for example, a scalloped edge, like we sometimes see on blinds) at the ends, hanging down. Measure carefully to make sure the rod holders are equally spaced.
This is what our pergola canopy should look like when it is fully extended. Have a look at the pergola kit pictures below to get an idea of how the finished canopy should look.
The bottom diagram would stretch the fabric, making it lose its shape over time, and this would certainly happen if rain was left to weigh down the fabric.
Either use shower-proof material, like the ones used in the pergola kits, or go for a water-proof fabric. However, these canopies are only intended to be a protection against sun and light showers. The channels that the drooping fabric creates help to prevent water gathering on the canvas.
Water is very heavy and, therefore, it is important to retract the canopy in heavier showers or when it's not in use, in order to prevent any weight of water damaging the canopy and mechanisms.Use Silicone Spray to keep the sliding mechanism gliding freely.
These can be very attractive, with a modern, sleek appearance, and act as a very effective canopy for a pergola.
Supplied as pre-manufactured kits, they are a convenient way to add an attractive feature to your garden quickly. Buy the sail with the attachment kit, and you'll be up and running in no time.
However, the smallest shade sails tend to be around 3m square. If your pergola is smaller, it's easy enough to make your own.
Do make sure that the supporting structure is strong enough to take the tension on the sails.
You will need:
Fixing kits containing all that you need to fix both triangular and square shade sails.
Here is a triangular shade sail...
...and here is a pergola kit with rectangular shade sails attached...
The shade sail must be positioned and tensioned so that there are no low spots where water can pool. This is why the sail is angled at different heights on each corner. The asymmetry is what gives the pergola a modern feel, and also protects the structure from excessive weight and deterioration by the weather.
Either use the metal fixing kit mentioned above, or alternatively use a strong hook, and make loops for the hook to pass over.
You may need something strong to lever the last loop over the hook in order to create the tension needed
Large or small shades can look really stunning. These are very large ones in an hotel courtyard!
When not in use for long periods, you may prefer to take the shade sail down and store it carefully, where nibbling creatures are unable to gain access (they will eat your shade sail if you don't protect it!).
Alternatively, leave it up, and if it's tensioned and angled properly, it should last for many years.
If you'd like all the tricky bits done for you and your space allows it, it might be worth considering a canopy pergola kit. They are available in wood, and there is an aluminium pergola too. Both come in free-standing and attached pergola lean-to designs.
As you can see, they create a wonderful place to relax and entertain.
A canopy for a pergola can extend its usability, with protection against sun and light showers.
Whichever way you choose to build a canopy for a pergola, I'm sure it will look terrific!
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