An accessible door threshold exposed to direct impinging rainfall can be a source of water penetration almost as large as an open door.
Leaking french door threshold.
This problem is already common but quickly growing because codes and standards require nearly all exterior doors to be accessible that is a low threshold with no step and a low slope walking surface.
Solution is a tight bottom sweep doorseal and a rain splashguard or dripcap on the bottom outer face of door like the following link the type i use unless a fancy appearing one is desired easy to diy on most doors.
If you have a water leak at your threshold you must watch this how.
Even brand new door.
Door bottoms are important but leaks can also be caused by the door sill.
There are many places where water can leak into your home.
Door bottoms seal between the panel and door sill so watch for signs when your door bottom needs replacing.
Http youtu be hg2mfndacfw waterproofing how to weather seal door threshold water leak.
6 rain hitting threshold and running down door face is splashing seeping under door on top of the threshold.
French doors consist of pairs of doors fitted with large areas of glass to allow light and outdoor views into the home.
How to stop water leaks under a door frame.
Door bottoms tend wear over time and sometimes our furry family members may help themselves to the new found chew toy.
Without proper sealing french doors.