French Doors

We intend to replace the current kitchen window with a set of French Doors, to give access to the patio area  and to let more light into the kitchen

Our choices are...Oak timber doors that need to be stained and treated to withstand the weather...
If we choose this style, we will need the builder to fit a lintel below present window frame and to add extra brickwork as these doors are only available in 2070 height - La Porte model..

or for UPVC oak style French doors with a window light above?  these can be manufactured in 2200 height which will fit to top of existing window space