Inspect the area above the leak including both indoors and out.
Fixing siding leaks.
Water can penetrate through cracks.
Depending on the type of siding you have wood or vinyl you will have to take a specific approach in fixing the problem.
Fixing old caulk or glaze isn t difficult especially if the damage is obvious but your task can be difficult if the leak is in the window frame or the siding.
Step 1 examining your home s exterior structure is the first step toward finding your leaky siding area.
This article describes the causes of all types of leaks in building siding and wall coverings.
Start by looking in the area where you ve spotted the stain.
Repairing leaky wood siding.
Siding leak diagnosis and repair.
Check to be sure weep holes are open along bottom of window openings.