These are still shade sails. The customer wanted them to attached to boom arms so he would not have any poles out on his deck. This application is a little less durable in high winds, but if you are vigilant, a really great look. They are made of HDPE material like our other sails, shades and canopies. I have attached another photo at a little different angle. Let us know if you have any other questions.

what do you do when there are high winds? We live in a few towns away and we experience some very windy Summer days. Who built the boom arms and installed them?

We would recommend taking it down, or collapsing it in high winds. The client was actually an engineer, from what I recall. He constructed and engineered the whole thing. We just manufactured the top to spec. In truth, we were pretty apprehensive about his steel sizing in our engineering department, but he has made it work. As you noted, it turned out really great and very unique.

I'm thinking about getting sails for partial cover of my new deck. Are they waterproof? I live in New England, so would have to take them down in the winter I imagine- how complicated is this? Finally, can a contractor installs them?

While water does not effect the material, the material is a tightly woven mesh. So it does allow some water to pass through. They are fairly easy to install. We can either talk you, or your contractor through the process. Let us know how else we can help.