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.
The best place to install sliding doors would be at a patio area or a deck. The standard size for a sliding glass door is 6'8 high x 6' wide. Other popular sizes are 5â0â X 8â0â, 6â0â X 8â0â and 8â0â X 8â0â. Keep in mind, these doors come in various sizes depending of the manufacturer.