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.
1 Prices start at about $300-$800 for a basic 5'-6' wide sliding glass door, or $700-$1,100 or more for a standard 8' wide door, typically with an aluminum or vinyl frame and options like a screen door or built-in blinds (between the panes of glass). Needed repairs to flooring, siding, deck or interior trim because of water damage, dry rot or other problems can add $50-$1,000 or more to the total cost, depending on the extent of the damage. 2  If not included, a sliding screen door can add $35-$150, or a retractable model can cost $100-$400.