Teflon (PTFE) Fabric Roofing
1. General: A short history of the use of Teflon fabric in the construction industry is available at NASA's Technology Transfer Program's website on this page. The article focuses mainly on Birdair's contributions to the development of the technology.
2. General: A generally informative article on Teflon is available at this Wikipedia page.
4. Safety: See this Material Safety Data Sheet for health and safety information about Teflon fabric at the Saint-Gobain website. This is only an example and other products and brands may be different.