Water travels. A stain on the bedroom ceiling often starts at a pipe boot eight feet uphill, runs down a rafter, and drips where it finally finds a seam. That is why leak prevention is about penetration points and water paths — not just shingles.
The four leak sources we find most
1. Dried-out pipe boots. The rubber collar around plumbing vents cracks in Central Texas sun within 8–10 years. A $40 boot, left alone, becomes a $900 deck repair. If yours show cracking, replace them before the next storm season.
2. Step and valley flashing. Where roof meets wall or two slopes meet, metal flashing does the real waterproofing — shingles just shed bulk water. Lifted, rusted, or caulk-dependent flashing is a leak waiting for a wind-driven rain.
3. Clogged valleys and dead spots. Leaves matted behind a chimney or skylight hold moisture against the roof for weeks. Clear them each fall; consider a cricket (a small peaked diverter) behind wide chimneys.
4. Hail-bruised shingles. Hail rarely punches through — it knocks granules off, exposing asphalt to UV, which cracks within a season or two. After any hailstorm, get a photo inspection even if nothing leaks yet.
You found a stain — now what?
Contain it (bucket, move furniture), photograph it with a date, and check the attic during the next rain — safely, with a flashlight, without touching wiring. Note where water enters versus where it stains: that gap tells your inspector where to start. Then call: a fast tarping-and-diagnosis visit costs a fraction of what a month of slow dripping does to decking, insulation, and drywall.
