Sliding glass doors can be either externally fitted or internally fitted. They are very secure and are often double-glazed, or can have UV-reflective treatment. They do not have mullions, but you can buy snap-on faux grids to cover them. This type of door will cost around $300 to $800 to install. This type of door is one of the most durable and energy-efficient options available.
You can choose from a wide selection of materials and styles. Prices vary widely, depending on the style, size and materials of the door. The most common sliding glass door features two panels that slide open and close. The movable panel slides along a track. Sliding glass doors are also less expensive than folding doors, which require precise fitment. The cost of replacement will depend on the material you choose, the number of people you need to hire, and the size of your home.