Where Is My Roof Leaking?
Find where your roof is leaking in Bellevue, WA. Answer a few questions about where the water shows and when it leaks, and this diagnostic lists the most likely causes — flashing, valleys, pipe boots, wind-lifted shingles — and what to check next. Call (425) 738-3670 for an inspection.
Find the likely cause of your roof leak
Four quick questions. Nothing is saved.
MOST LIKELY CAUSES — A GUIDE, NOT A DIAGNOSIS FROM THE GROUND
Remember: a ceiling stain rarely sits directly below the leak. Water travels along the rafters and the roof decking before it drops through, so the stain is often several feet from where the water gets in.
How the roof leak diagnostic works
Leaks start in a small number of places: flashing at chimneys, valleys, skylights and vents, pipe boots, ridge caps, wind-lifted shingles, and moss lifting shingle edges. This tool matches what you see — where the water shows, and when it leaks — against those causes, and lists the three most likely ones. A stain around a chimney in heavy rain points to chimney flashing. A stain that only appears when wind drives the rain points to wind-lifted shingles. Water that appears even when it is dry usually is not a roof leak at all — it is plumbing, and the tool will say so.
Infographic: the five most common places a shingle roof leaks — chimney flashing, valleys, vent pipe boots, ridge caps and wind-lifted shingles. Original diagram, not a photo of a completed job.
Symptom, likely cause, and what to check
Use this table to read your own symptoms before you call. It covers the patterns we see most often on Bellevue roofs.
| What you see | Most likely cause | What to check |
|---|---|---|
| Stain on the ceiling, worse in heavy rain | Valley flashing or chimney flashing | Look for the stain's line — a valley stain follows the valley; a chimney stain sits near the chimney breast |
| Stain only when wind drives the rain | Wind-lifted shingles or ridge cap | Look for lifted or creased shingles on the windward slope and along the ridge |
| Stain around a vent pipe on the ceiling | Cracked pipe boot | The rubber boot splits with age and sun — a common leak on roofs over 10 years old |
| Damp in the attic, no ceiling stain yet | Valley, ridge cap or flashing leak | Check the attic for damp insulation and daylight through the boards |
| Stain on a wall below the eaves | Flashing failure or gutter overflow | Check whether gutters are blocked, and whether the stain lines up with a valley or chimney |
| Water even when it has not rained | Probably plumbing, not the roof | Check bathrooms, the water heater and pipes above the stain first |
| Moss and a stain on a shaded slope | Moss lifting the shingles | Moss holds water and lifts shingle edges — the leak follows the moss line |
Need shingle repair in Bellevue? Call now for a free inspection and a written quote.
What to do when your roof is leaking now
Do not ignore it, and do not climb on a wet roof — falls from wet shingles are how people get hurt. Put a bucket under the drip, move anything valuable out of the way, and take a photo of the stain and the roof from the ground if you can do it safely. If water is coming in fast, call us and we will give you an honest response time; a temporary cover can keep the water out until the permanent repair is done. Then book the free inspection — we trace the leak to its source, photograph it, and give you a written quote. For the repair itself, see roof leak repair in Bellevue and how to find a roof leak, or check the price first with the shingle repair cost estimator.
Roof leak FAQs — Bellevue, WA
Why isn't the stain directly under the leak?
Water rarely drops straight through. It runs along the rafters and the roof decking before it finds a way inside, so the stain you see on a ceiling is often several feet from where the water gets in. That is why leak tracing matters: we follow the water back to its entry point — usually flashing around a chimney, skylight or vent, a cracked pipe boot, or a missing shingle — and fix that spot, not just the stain.
Can a small roof leak wait until later?
No. A small leak keeps wetting the decking and the insulation every time it rains, and that turns into rot, mould and a stained ceiling that costs far more to fix than the leak itself. A missing shingle or a cracked pipe boot is a small repair now; left alone, it becomes a whole-slope problem. If water is coming in, call us and we will give you an honest response time.
How do I know if it is a roof leak or a plumbing leak?
Watch when it happens. If the stain only appears or grows when it rains, it is almost certainly the roof. If it is wet even when it has not rained for days, check the plumbing first — a bathroom, a water heater or a pipe above the stain. This diagnostic asks about timing for exactly that reason, and it will say so if the pattern points away from the roof.
Do you find roof leaks for free in Bellevue?
The inspection is free. We walk the roof, trace the leak to its source, photograph the damage, and give you a written quote before any work starts. Call (425) 738-3670 to book, and tell us where the water shows and when it leaks — that is exactly what this diagnostic asks, and it helps us find the cause faster.
Water coming in now? Call (425) 738-3670 — we will give you an honest response time, and the inspection is free.