Vinyl hurricane window frames. Vinyl insulates better than aluminum which is a reduced-servicing material. It generally has fewer type and fewer coloration options, but you can find mixture vinyl-and-Wooden frames out there that provide the next standard of insulation and they are even less difficult to take care of. Vinyl http://news.charlestonnewsonline.com/story/546178/highperformance-impact-windows-built-to-meet-florida-building-code-standards.html