Patio Door Leaking At Bottom

1 place the end of a strip of adhesive backed aluminum tape on one of the side jambs in.
Patio door leaking at bottom. Water leakage is a common problem with sliding door thresholds. Sometimes water intrusion is severe staining carpets and causing dryrot at the subfloor baseboards and sometimes even the wall. If you have a problem with water leaking it will usually be on the bottom track threshold of the non stationary door. The gutters are clear and the patio is level.
However in some instances the top corner of the door is the true culprit. Aim a garden water hose with a sprayer set on mist or low at the outside of the sliding door. If you cannot re create the leak problem inspect the interior of the door for stains or rust. You can do this by taking steps to make the bottom of the door frame waterproof before you install the door.
If you like my content or find it helpful support my youtube channel or my podcast links below. Whether your door is sagging or bowed or just not making proper contact with the weatherstrip to seal out air and water the upper corners of your frame could be the problem. Moisture could be seeping into your home from the top. To slide the heavy doors along the metal frames the doors use metal or plastic rollers.
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. Spray the door and look for the leak location. When a door leaks the most common suspect is the bottom corner of the unit.
6 rain hitting threshold and running down door face is splashing seeping under door on top of the threshold.