I worked on flat roofs generally. Plastics on big chit. Mostly layers of insulation, glie down the edges and throw some screws down. Occasionally you would get cheap cousties who wanted us to throw tar down and essentialy roll the plastic down. That sucked worse and was more scary than I can relay through text. All the tar wen down like an ocean at once. They didn't want it getting on the clean white plastic finish. It was slippery as fuk, before I had worked there a guy had to get across to somewheres and stepped in the molten chit and slipped and fell right on his face. Didn't get his face I don't think but melted his clothes on to him and did bad damage to his arms. They always made us where long sleeve blue shirts when we worked with the stuff. Made the day hot as hell, but offered a chance for the tar to cool when it inevitably hit your arms.
I had two heat strokes or exhaustions, while I worked for them. We partied pretty fuking hard though. Had a couple Irishman that were in my small crew and they taught me how to get drunk. Played a game called tomo todos (sp) a lot that was fun. Anyways, the drinking I'm sure was partially responsible for the heat, but on two occasions I went into puking fits and hit the ground and my ENTIRE BODY became cramped. Always happened when I got into my air conditioned hotel. Actually that happened several times to a lot of us and we drank mpre water than was safe while working. They saI'd the white roofing was mirror like and added 30 degrees to the heat under the sun. And we only worked under the sun..lol.
Young and having fun, partied a bit much but what are you gonna do

The only time I was ever scared or not having fun was repairing the sheet metal roof on a bottling plant in Vancouver. We were directly above the glass melting pot or what ever, about 100' or so. Super steep pitch and we had to be tied off. Each section we pulled off was hot as chit. The exhaust for the furnace was huge and about 10' away from wjere we worked. You could spit on it and it would boil instantly. Really small section and only took a week or so. I remember the firat piece we pulled up, only three of us, and seeing the giant pool of liquid orange glass directly below us. Something I wasn't aware of going in and will never forget.