first class(noun) the highest rank in a classification. first class, 1st class, first-class mail, 1st-class mail(noun) mail that includes letters and postcards and packages sealed against inspection. first class(adj) the most expensive accommodations on a ship or train or plane.
A very basic sliding glass door, without professional installation, can cost $300 to $500, and this is the type of door most people think of when they hear the term sliding glass door â a six-foot pair of plain glass panels inside a simple frame. An eight-foot door can run $800 to $1,200 without professional installation.
Sliding glass doors for a walk-in shower enclosure are typically about 48-60 wide and 70-72 tall, and can cost $150- $2,000 or more, depending on whether they are framed, semi-frameless or frameless; the thickness of the glass; and the type of glass (clear, frosted, etc.).