There are no drain holes.
Horizontal sliding windows leaking.
There will be a natural gap under the sliding portion of the window and there should be weep holes in that track to allow water to drain to the outside.
If stains are present at the top part of the window frame the possible cause is leak in your walls.
You might be able to tie it down by carefully running a hose around the window starting at bottom and moving up and seeing if the leak is from a gap around the window frame coming through the weatherseals on the moving window components themselves or just leaking in because the ewater in the tracks is overflowing the tracks.
An inward angled fascia which is the board running above the window horizontally can channel water into the window exposing any weakness of the window or the seal.
In this video james demonstrates how your sliding window drains water due to wind driven rain and keeps the water from coming inside your home.
Check your walls for sealing gaps or cracks to verify this.
Steps you can do to fix your leaking windows.
When it rains with a strong wind driving the rain against the window water leaks in through where the window closes the side of the window where the locks are and water leaks in and gathers in the track.
But if water is coming in under the total frame then you have an installation problem.
But after looking at my windows that haven t leaked yet they do not have this.
Lack of overhang to keep wind driven rainwater from battering the windows.
This will allow any water that comes in through the screen to drain to the outside.
Use a small wire to unplug these holes.
Horizontal sliding windows leaking.
We are having problems with our horizontal sliding windows.
Clean dirt debris and insects from weep holes in the frame bottom.
While considered as a less common cause of window leaks do not disregard defective products.
Horizontal sliding windows leaked the first week of a new construction build.
Sliding windows or gliding window inspection troubleshooting leak repair slider windows such as the page top installation on a cabin in northern minnesota and at left at a new york home can offer large horizontal expanses of glass and operable sash that do not interfere with interior or exterior space.
The subcontractor said the windows just needed a sealant pictures included on a few gaps and screws said that s all that was lacking.