As in any other year, in 2017 bifold doors prices will be dictated by the size, style and materials of the bifold door being ordered.
As you can see from the above, there is a good range os sizes to deal with different situations.
Although, in general the typical max height of a standard door of any type will be 2200mm and anything over this height will need to be discussed with your chosen supplier.
In terms of colours, you can choose from the following
Plus a few more
Aluminium doors are coloured at manufacture stage by spray painted powder coats. This could, in effect, allow you to have nay colour you like.
In practice, most suppliers can offer 100 to 150 shades as basic colours.
Timber bifold doors are usually painted or stained to the colour / shade of your choice at manufacture stage.
As a painted surface, you can mostly have any colour you like,
Alternatively, you have the choice to have the wood stained before installation.
You can find more information and free quotes for bifold patio doors at www.cheapupvcbifolddoors.co.uk