How to fix a sliding door leak.
How to fix sliding door water leak.
There are countless videos online that show you how to install these flashings under a door or window.
Test the door for the location of the leak.
There are pre formed plastic flashing pans that you can use under the door or you can create one with thin sheets of lead or the modern rubberized asphalt based flashing tape.
If you have a water leak at your threshold you must watch this how.
Place the end of a strip of adhesive backed aluminum tape on one of the side jambs in the doorway 3 inches above the threshold.
Aim a garden water hose with a sprayer set on mist or low at the outside of the sliding door.
Press it tightly against the jamb including the corner.
Check the weatherstripping or flashing.
Http youtu be hg2mfndacfw waterproofing how to weather seal door threshold water leak.
Cover the bottom of the side jamb with the tape.