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.
Water under door threshold.
But be aware that is a temporary fix that must be renewed on a regular basis as it cracks or gets kicked away.
This means that under the door there needs to be a water membrane that protects the subfloor from water and overlaps the last piece of siding or exterior material that tucks up under the door threshold.
Some areas like your roof are obvious locations.
You could try a door sweep with a rain drip cap to keep water from running down the door and going inward at the bottom.
If the water is indeed leaking in under the threshold silicone caulk can be applied at the front of the threshold to stop the flow.
I might try running a bit of caulk between the wood and aluminum on the threshold under the weatherstripping first and see if i have any better luck with that.
If you have had water damage the threshold may be popping up may have become swollen or may have suffered other damage.
Replace the hinges completely and rehang the door.
You ll want to make certain the strike plate and latches are in alignment.
Bifold door drainage prevents water gathering in the track and channels it away from your home to avoid water accumulation and potential damage.
Tall barrier to the garage floor.
If you plan to attach a new door bottom with a drip edge you may have to plane the bottom of the door slightly.
Thinking about draining options is necessary with external bifold doors as an adequate drainage function is required to channel water away from the threshold during instances of rain.
How to stop water leaks under a door frame.
6 rain hitting threshold and running down door face is splashing seeping under door on top of the threshold.
Make sure the hinges are tight.
Also if you have a sloped driveway or an uneven garage floor and water is seeping under your garage door the door seal adds a 1 2 in.
This should stop the door from dragging.
Better yet you should install a preformed flashing pan under the door or window.
If your door has fallen out of alignment take time to make certain your door fits straight before you begin weatherproofing.
The garage door threshold seal creates a tight seal for your garage door which will keep leaves dirt water and snow from being blown under the garage door by the wind.
Remove the door from the hinges remove the hinges from the door jamb.
Do you see a lot of water ponding in front of the door after a rain.