Hi, megconway! Thanks for the question. This fence is a design of ours for this project only, and was custom-fabricated using standard steel sections (angles, tubes, and flat bar, with welded-wire mesh infill panels). We attached it to the wooden sleepers that support the roof deck, so we wouldn't have to penetrate the roof membrane in order to keep it stable. If I remember correctly, it's painted in Benjamin Moore's Chelsea Gray, a nice warm neutral gray color (with some brown and green mixed in).
Good luck with your fence work! :)
Paul

i thought so-have researched fences for sometime and hadn't seen anything like this-it's perfect-meg

I would also like to know what the fence grids are....

That's great information-I had assumed that since it was custom it would have been expensive-thank-you, Meg

We have a large selection of Wire Mesh, both woven and welded, on our site at www.mcnichols.com. We can also fabricate into complete infill panels. Check us out!

https://www.houzz.com/products/crystal-semi-flush-mount-with-fan-function-and-remote-controlled-prvw-vr~93626650