I have a set of french doors I want to replace with Bifolds. This will extend the opening by around 900.
The French doors are in a single story lean to extension, there are no bricks above the French doors, it seems that the builder put a roof plate across and then the roof timbers are sat on that.
The lean to roof hits just under the upstairs window.
So would I need to put some kind of lintel in, or just use the wall plate?