JELD-WEN Premium Atlantic Aluminum patio doors provide the reliability you are looking. Our aluminum patio doors include a unique performance feature - it's our patented silicone-injected corner key, which is created by injecting silicone into the corners for added strength. This feature also ensures the patio doors is reliably weathertight. Sliding patio doors are spaces saving. Standard high-performance LowE insulating glass lowers energy costs, helps homes stay cooler in the summer and warmer in the winter.