The lift-slide mechanism on Zola’s new PanoramicView aluminum-clad series sliding door makes a tight water and air seal when the slider is closed, yet is reportedly easy to operate even with door panels of 8 by 11 feet. Custom-manufactured in Poland, the doors have a 10-to-12-week lead time. The door shown costs about $15,000. Zola Windows, 303.578.0001, zolawindows.com