A roof leak can start as a small issue—but left untreated, it can lead to mold, water damage, and structural problems. The sooner you find the source of the leak, the easier and cheaper it will be to fix.
Here are some reliable tips on how to find a roof leak before it turns into a major headache.
1. Start in the Attic
If you have safe access to your attic, this is the best place to start. Take a flashlight and inspect the underside of the roof during or after a rainstorm.
Look for:
- Dark water stains on wood
- Dripping water or wet insulation
- Mold, mildew, or a musty odor
- Visible light shining through the roof deck
Mark any suspect areas so a professional can easily assess them later.
2. Follow Interior Water Trails
If you notice ceiling stains or bubbling paint, trace the water’s path upward. Water often travels before it drips, so the actual leak may be several feet away from where you see damage.
Look around chimneys, vents, skylights, and roof joints. These are common weak points where leaks often start.
3. Inspect the Roof from the Outside
Using binoculars or a drone (never climb on a wet or steep roof unless you’re trained), check for:
- Missing, curled, or damaged shingles
- Cracked flashing around roof penetrations
- Debris buildup or blocked gutters
- Exposed nail heads or roofing fasteners
- Ponding water or sagging areas
If you live in a region prone to hail or windstorms, check for dented vents or soft bruising on shingles.
4. Test with a Hose (If It’s Safe)
If the leak is hard to find, a controlled hose test might help. With a partner inside the attic or home, spray different roof sections with water and wait a few minutes between areas. This can help you pinpoint the leak location.
Important: Only attempt this in safe weather conditions, and avoid spraying water uphill or under shingles.
5. Don’t Forget the Gutters
Clogged gutters can back water up under shingles and into your home. During your inspection, make sure gutters and downspouts are clear of leaves and debris and properly directing water away from the roof edge.
6. Know When to Call a Professional
Even with the right tools and tricks, some leaks are hard to find—especially if the water is entering through small gaps or flashing failures.
That’s where The Best 10 Roofing comes in. We connect you with licensed, top-rated roofing contractors who can locate and fix roof leaks quickly and safely.