how to tell if it's a roof leak 2
https://tango-wiki.win/index.php/How_to_Identify_the_Real_Ceiling_Water_Stain_Cause_Before_Calling_a_Contractor
If you spot a water stain on your ceiling after a rain, start by heading to the attic the same day to look for damp insulation or wet rafters directly above the spot. A roof leak usually shows up as a dark, spreading patch that grows after each storm, and it may feel cool or damp to the touch. Check for mold, peeling paint, or a sagging ceiling; these all point to water coming from above rather than a pipe problem. Also, inspect your roof for missing shingles, cracked flashing around vents or c…