Rebuild the water path
A failed boot needs a sound seal around the pipe and a correctly lapped connection to the covering. A wall joint needs flashing that drains onto the roof instead of trapping water behind it.

The water mark indoors shows where water arrived. Leak repair finds where it entered the roof and restores the layers that should have carried it away.
Free inspections. Roofing advice grounded in the roof’s condition.
Rain can run along the underside of decking or framing before it reaches a ceiling. The entry may be at a pipe, valley, wall joint or damaged covering above the stain. Wind-driven rain adds another clue because it can reach openings that a straight-down shower misses. An inspection follows those connections and the drainage path rather than choosing a repair from the interior mark alone.
Flashing repair details
A failed boot needs a sound seal around the pipe and a correctly lapped connection to the covering. A wall joint needs flashing that drains onto the roof instead of trapping water behind it.
Shingle damage needs compatible material secured into workable adjoining courses. If the leak has softened decking or affected other concealed layers, those materials become part of the repair.
A small entry can sit within a larger deteriorated area. Brittle shingles that break during lifting, several failed joints or recurring leakage across slopes reduce the value of another patch. The repair decision depends on what can be rebuilt into a continuous water path. Replacement is useful when that sound connection cannot be made within a localized area.

Keep away from a sagging ceiling and water near electrical fixtures. Call and say water is entering, where you see it and when you first noticed it.
Temporary protection and the permanent repair do different work. The price depends on access, the failed detail, how much covering has to be opened and concealed damage; a residential replacement calculator does not price that scope.

Tell us where the property is and what you have noticed. A free inspection helps establish the roofing work that fits.
(913) 347-8445