The short answer
Start in the Attic
The attic is the fastest place to trace a roof leak. On a dry day, bring a flashlight and look for water stains, dark streaks, or sagging insulation. Pay special attention to the underside of the roof deck, where moisture often travels along rafters before dripping down.
If you see a stain, mark the highest point of the wet area. That is where water is entering. Use a tape measure to note its position relative to the walls or chimney. This helps you find the same spot from the outside, even if the roof slope hides it.
Inspect Penetrations and Valleys
Most roof leaks happen where something breaks the surface: vents, skylights, chimneys, or plumbing stacks. Check the flashing around each penetration. Cracks, lifted edges, or missing sealant are common entry points. Also inspect roof valleys, the inward angles where two slopes meet, because debris and ice can back up there.
Look for rusted or loose flashing, and check the rubber boots around vent pipes. If you see damaged caulk or mortar on a chimney, that is a likely culprit. Use binoculars from the ground if the roof is steep or slippery. Never walk on a wet or icy roof.
- Check flashing around chimneys, vents, and skylights
- Inspect roof valleys for debris or damaged shingles
- Look for cracked or missing sealant around pipe boots
- Examine the drip edge and fascia for gaps
- Note any rusted or loose metal flashing
Look for Damaged Shingles
On the roof surface, search for cracked, curled, or missing shingles. Wind can lift edges, and hail can create small punctures. Check areas where tree branches rub against the roof, since they can scrape away granules. Also examine the ridge caps, which are prone to cracking.
If you find a damaged shingle, mark it with chalk or a small piece of tape. You can often fix a single shingle yourself, but if the damage is widespread, a roofer can assess the whole roof. Do not attempt repairs on a steep or wet roof.
Use Water Testing Carefully
If the leak is hard to find, you can simulate rain with a garden hose. Have a helper inside the attic with a flashlight and a phone. Spray the roof in small sections, starting low and working upward. Wait a few minutes between sections so water has time to travel.
This method works well on a dry, warm day. Avoid spraying near electrical fixtures or on a slippery surface. If you cannot locate the leak this way, a water damage professional can use moisture meters to trace the path without guessing.
When to Call the Pros
Some leaks are simple to find, but others hide behind insulation or travel along sloped ceilings. If you cannot trace the source, or if the leak is large, contact local water damage pros. They have tools like thermal cameras and moisture sensors that pinpoint moisture without tearing out drywall.
Before calling, take photos of the stain and the attic area. This helps the pro know where to start. If you live in Orem, keep your shutoff valve location written down, though for a roof leak that is less relevant. A professional can also check for mold, which is a separate concern.
Water damage does not wait
Every hour counts once water gets into floors and walls. One call starts the response.
Call Now (801) 876-1119Frequently asked questions
Why can't I find the leak from inside?
Water travels along rafters and insulation, so the stain you see may be far from the entry point. It can also follow a pipe or wire down a wall. Trace the stain upward to the highest wet spot, then check the roof surface above that area.
Can I fix a roof leak myself?
Small issues like a cracked shingle or lifted flashing can be repaired with roofing cement or new nails. Larger problems, such as rotted decking or damaged flashing, need a professional. If you are unsure, a roofer can inspect and advise. Never work on a wet or steep roof.
How do I know if the leak is from the roof or something else?
Roof leaks usually appear on ceilings or near exterior walls. If the stain is on an interior wall or near a bathroom, the source may be a pipe. Check the attic first. If you see water on the underside of the roof deck, it is a roof issue. Otherwise, a plumber may be needed.