When you are choosing the curtains for the sliding glass door you need to consider the functionality as well as light penetration that you desire before deciding the window treatment. sliding glass door is made up of two sliding panes of glass which create a large window in area where it is installed. This is why you need to have curtains for the privacy as well as for reason such as less light penetration in room.
Curtains are considered as decorative items as well as option as cover to door or window to provide blockage to light and for the privacy purpose.
Here are some curtain ideas for sliding glass door:
Large curtain which is composed of single panel of the fabric will provide functional purpose such as light blockage and even privacy. You can also use different fabrics to make single panel curtain which you can hang from aluminum runner some 2 to 4 inches above sliding glass door.
The thickness of fabric that is from light to medium and heavy fabric affects the penetration of light. Light to medium can provide privacy function but allow some light penetration and heavy fabric will completely block the light penetration.
Single panel curtain offer solid barrier over sliding door as oppose to other option which can just cover a portion of the glass door.
Dual Panel curtains which hang from either side of door offer functionality along with design opportunity. Dual panel are usually install on dingle aluminum runner above door which allows curtains to slide to varied distance from sides of doors. You can pull panels together and create solid privacy barrier or pull them back to either side which will look decorative. Dual panel curtains can be made from many fabrics but heavy material are typically used to provide option of complete privacy and blockage of light.
Hanging on accenting fabrics around edges of sliding glass door provides decoration and not block large window area. This is more common choice for the homes in secluded areas which provide for privacy without much use of panels. You can use fabrics from typical aluminum runner and drape in folds to provide very stylized design around sliding glass door. Accenting fabrics can be of any material and can be aesthetic base curtains purely.