Skip to main content

§ 01.05Roof leak diagnostics — TX + OH

Find the leak. Then fix the leak.

The leak shows where water exits, not where it enters. We trace from the ceiling stain back to the entry — pipe boot, kickout, dead valley. Or not the roof at all. We won't sell a tear-off when a $200 boot fixes it.

Where the leak usually is

Six places it is not the field shingle.

When a roof leaks, the field of the shingle is the last place we look — not the first. These six places are the actual answer on most calls. The diagnostic tells us which one. The fix matches the diagnosis, not the upsell.

  1. 01

    Pipe-boot rot

    The rubber gasket around a plumbing vent pipe sun-rots in 8–12 years. Cheap fix. Common cause. The shingles around it look perfect — the boot is the whole problem.

  2. 02

    Missing kickout flashing

    Where the roof meets a sidewall, a small piece called a kickout should divert water away from the wall. Builders skip it constantly. Without it, water runs down behind the siding for years before anything visible shows up.

  3. 03

    Dead-valley ponding

    Where two roof planes meet at a low slope, leaves and debris dam water back until it sits long enough to find a way through. The shingle is intact — it was never designed to hold standing water for hours.

  4. 04

    Chimney crown crack

    The concrete cap on top of a chimney cracks from freeze-thaw. Water pours straight down inside the chimney chase to wherever it finds an exit — often the ceiling six feet from the chimney itself.

  5. 05

    Skylight-curb separation

    The glass sits in a wood curb sealed with butyl tape. The seal hardens and shrinks. Water tracks the inside of the curb, exits a foot or two from the skylight, lands on the ceiling, and reads like a roof leak.

  6. 06

    Not the roof at all

    AC condensate-line drip, a plumbing leak in the wall, attic condensation in cold weather, or a failed window seal that ran horizontally before it dropped. Same ceiling stain. Different repair. Different price.

We rule out the cheaper causes before we sell you the expensive one. The diagnosis decides the scope. The scope is not pre-decided.

§ 12Continue the manual — related to this page

¶ In this trade

Five pages homeowners read next.

See all 12 in Roofing

This page is 01.05 in the manual · part of Roofing · 12 services

Open the Roofing hub →

§ 06Reach the dispatch desk

Run the diagnostic. Then decide the scope.

A senior estimator on the roof and in the attic. Moisture meter on the rafters. Thermal imaging when the path is not visible. Water-trace test if the leak is intermittent. Written report inside 48 hours. The fee credits to the repair if the repair follows.

(214) 578-9961