Due to florida hurricane codes sliding doors must have a 1 5 3 5 inch water threshold dam.
Sliding patio door track fills with water.
Water intrusion in some sliding glass doors can occur with wind driven rains at speeds as low as 22 miles per hour.
A sliding glass patio door correctly installed and maintained will mitigate most of these issues but annual preventative maintenance with an elastomeric sealant around the perimeter is a must.
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Water collects on both sides of the track where the sliding part of the door sits and where it slides.
The track on the sliding glass door should have a weep hole drain hole on each end to drain the water out of the track.
A common practice by some remodelers when transforming a back porch is to have a sliding glass patio door installed directly on top of the pre existing concrete slab to the outer edge.
With such strong requirements if you are still finding water intrusion after general maintenance and a weatherstripping installation your sliding glass doors or impact windows may not be properly installed.
The openings often become clogged with dirt and debris.
Small slots in the exterior section of track provide drainage when water comes in contact with the glass door.
Last night we had heavy winds with the rain which blew it against the door and the tracks filled to overflowing quickly even though the rain wasn t all that heavy.
It is likely that one or both of these weep holes are clogged.
You ll need to caulk the corners if the water s coming in at the window ends.
These holes are normally in the outside corners of the tracks.