We diagnose hundreds of roof leaks across North Texas every year, and the same problems keep showing up. Ranked from "happens constantly" to "rare but ugly," here are the seven causes we see most.
1. Pipe boot failure
A pipe boot is the rubber collar around your plumbing vent stacks. Rubber + Texas UV = a cracked seal in 8 to 12 years. The water runs straight down the pipe into your attic, then drips onto whatever happens to be below. Roughly 40 percent of the leaks we get called about trace back to a $150 boot replacement.
2. Failed flashing
Step flashing, counter flashing, valley flashing, apron flashing — any of them can fail. The most common spot is where the roof meets a sidewall (a dormer, second story, or chimney). The flashing lifts, the sealant cracks, water gets in. About 25 percent of leak calls.
3. Wind-blown shingle
A high wind event lifts a shingle, breaks its tar seal, and the next driving rain finds the gap. The leak usually shows up in the ceiling directly below the missing shingle, but not always — water travels along the decking before finding a hole. About 12 percent.
4. Clogged gutters
Gutters back up, water pools at the eave, wicks under the shingle bottom edge, rots the fascia, and finally drips into the soffit or down the interior wall. This one is preventable with a simple twice-a-year cleanout or guards. About 8 percent.
5. Skylight gasket failure
Skylights have an internal weather seal that fails after 15 to 20 years. The leak looks like it is coming from the skylight glass but is actually a perimeter gasket issue. Replacement seals or full skylight retrofit fixes it. About 5 percent.
6. Damaged or missing chimney cricket
A chimney cricket is the small diversion ridge installed behind a chimney to route water around it. Houses 30-plus years old often never had one installed, or the original cricket failed. Water pools behind the chimney and finds its way in. About 4 percent.
7. Ice & water shield missing in valleys
On budget-installed reroofs without ice-and-water shield in the valleys, every nail penetration in the valley underlayment is a future leak. The leak takes 4 to 8 years to develop and is genuinely hard to fix without redoing the valley. About 3 percent.
How we diagnose them
Standard process: visual inspection of the leak's ceiling location, then attic inspection to trace the water back uphill, then a roof walk to find the specific failure. Moisture meter if we need to find a wet decking patch. Most leaks are pinned down in under 30 minutes.
Free estimates across North Texas. Same-day inspections during storm season.
