Its is called corrogated roof. Sold at lowes in 8ft, 12 ft, and 16ft sections. Comes in clear, white, smoke, Black(I think), and steel. Will be found in the lumber department by the shingles.
It really has no special name. Oh some info! If you live somewhere with really strog winds it wont hold up long. It is a thicker plastic but not thick enough to withstand high winds. It is good though to give your chickens a little more light if you use clear. It will be around 20 a panel. Which they are a little over 2 ft wide.
Need any other info just ask. Sorry to sound so wierd I work at Lowes so I just start blurting all this out when someone asks about it.

