Causes of door leaks there are many potential pathways for water to leak in through a door but the biggest opening is of course the doorway itself.
Patio door frame leaking.
Common leak paths for doors.
Test the door for the location of the leak.
Some areas like your roof are obvious locations.
I plan to seal.
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.
Although leaks are extremely common in these areas and sometimes allow rain water air and light into your home a sealed crucial corner won t fix a leak issue in other areas of the door.
There are many places where water can leak into your home.
Simply remove the corner pad s adhesive backing and stick the small square pad to the insides of your door frame at the crucial corners.
One potential problem area you can.
Aim a garden water hose with a sprayer set on mist or low at the outside of the sliding door.
The gutters are clear and the patio is level.
If you cannot re create the leak problem inspect the interior of the door for stains or rust.
It may seem obvious but a door left open or one that cannot be closed tightly because of wear and tear is a significant problem during a storm.
How to get rid of water in your patio sliding door wall.
How to stop water leaks under a door frame.