What is this and where it will be used on the house?!?

The Owners have approached local artist Kate Kirby (http://www.hartregionalartscouncil.org/?artist_photography=kate-kirby) to photograph a few samples of this material because it will weather in time and change appearance. The process and evolution are spectacular. 

These are a few shots by Kate after just a few days on site. 

Can you guess what it is and where it will be used?

Update 2 years later

We realized we have been really bad at sharing the construction progress and we decided to pick up where we left off, two years ago, and show you how the construction evolved since then since the house is almost COMPLETE.

The Owners have been managing the entire construction process and they are doing an unbelievable job at making sure every details if PERFECT as intended!

Below are a few pictures with the butterfly roof after the TPO was installed.  A few reasons we selected TPO roofing:

1. highly reflectable
2. recyclable
3. high albedo