Sight lines is the term used to describe the interruptions in the view through the doors; in other words, the width of the vertical opaque areas between the glass when the doors are closed. On hinged doors, such as French doors and bi folding doors, timber and pvc frames generally have broad sight lines because, unlike aluminium, narrower frames would not be strong enough to be fit for purpose. As a guide to the width of two frames together, cheaper pvc door frames can exceed 200mm, aluminium frames are typically between 135mm and 160mm and frameless patio doors sight lines are under 40mm. Depending on the width of each door and number of doors to be installed, the difference in glass to frame ratio could be significant.
A good place to start would be a home design store that offers patio doors with built in blinds. You will need to know the measurements of your door area in order to get an idea of the sizing needed. The more popular door units will be energy efficient to keep your home insulated from both hot and cold weather temperatures. The actual blinds themselves are usually white in color and have features like tilt and raise operation and maintenance free styling. These doors are also built to be strong and weather resistant, so they should last for years without any problems.
There are two basic types of patio doors which include the hinged patio doors and the sliding or gliding patio doors. Hinged doors are normally available as French doors which come in a set of two doors. These normally open to the outside and may have a lot of glass incorporated into their overall construction, thus allowing you a view of the outside. There are certain other hinged doors that come in the form of accordion doors and are therefore able to fold open. If you are living in regions with warmer climates, you should consider investing in a good pair of accordion doors which also happen to be very space efficient. On the other hand, the sliding patio doors are normally available in a set of two, in which case one door slides past the other and in most cases these are entirely made out of glass.
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