1. What is a Skin-Saw?Hello Hayley,
Last year I purchase a large run on deep discount from Tractor Supply. It is about 8'x15' and has a door that I can walk into and stand up. I connected it my coop. Half the roof of the run was covered in heavy corrugated plastic roofing. I decided to extend the roof covering and went to Lowes and found more corrugated roofing material. It comes in 8' sheets. It's made of an asphalt type material that I was able to cut to size w/my Skin-Saw. Made sure to get gable capping material and special rubber gasket sealed roofing screws as well. For you situation, I'd use tar paper stapled down then get a cheap bundle of partially broken shingles at a discount. Make sure you know what your square footage is so as to buy enough shingles. If you don't know how to shingle a small roof (it's easy) check on Youtube for video instructions). You'll also need what's called a drip edge which is a formed aluminum strip that is placed under the shingles to support them when you overlap the bottom edge. Attach this with galvanized roofing nails. As for waterproofing, I'd use Thompson's Water Seal. I did this with my entire base that I made for the run to rest on. Good luck!
2. Can you post a link to the plastic corrugated roofing?
I'm thinking I may have to do the shingles, just wanted something in a one-piece solution.