Get the sealant here usa.
Patio door leaking at top.
Moisture could be.
I plan to seal.
When a door leaks the most common suspect is the bottom corner of the unit.
Occasionally these sliding doors leak and need to be repaired.
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.
Got a water leak around or below a upvc window or door.
Here is the solution to fix it relatively easily and permanently.
I ve got a sliding patio door on the back of my home there s a moisture problem directly under the door in the basement.
Even if your door is new keep in mind that window and door openings that don t have correctly installed flashing oftentimes succumb to the elements.
Water can also get under the threshold of a door especially if the door was installed without adequate sealant between the underside of the threshold and the top of the sub floor.
The gutters are clear and the patio is level.
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.
Step 1 test the door for the location of the leak.