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What Causes Roof Leaks?

Last updated October 25, 2026

The short answer

Damaged Shingles and Tiles

Shingles and tiles are your roof's first shield. Over time, sun, wind, and storms can crack, curl, or lift them. A single missing or broken shingle lets water slip under the layers below, and that water can travel sideways before it drips into your attic.

Hail is a common culprit in this region because spring storms can dent or fracture asphalt shingles. Even if the damage looks small from the ground, water finds the gap. Inspect your roof after any major storm, and look for granules in the gutters, which often signal worn shingles.

  • Cracked or curled shingles
  • Missing shingles after high winds
  • Hail dents or fractures
  • Granules collecting in gutters
  • Loose or lifted edges

Failing Flashing and Seals

Flashing is the metal or rubber strip that seals roof edges, valleys, and anything that pokes through, like chimneys, vents, and skylights. When flashing corrodes, pulls away, or was never installed well, water sneaks behind it and runs into the structure below.

Seals around pipe boots and vent bases dry out and crack over time. You might not see a leak inside until the wood rots. A quick check of these areas, especially after a hailstorm, can catch problems before they spread.

  • Cracked or missing caulk around pipes
  • Rust or gaps in metal valley flashing
  • Loose chimney flashing
  • Dried-out rubber boot seals
  • Skylight frame gaps

Clogged Gutters and Standing Water

Gutters that fill with leaves and debris stop water from draining off the roof. When water backs up, it can slip under the shingles at the eaves or overflow and soak the fascia boards. In heavy rain, trapped water can push upward under the roof covering, especially at the edges.

Keeping gutters clear is a simple habit, but it matters. If you see water spilling over the sides during a rain, that's a sign the gutter is blocked. Clean them twice a year, and check the downspouts for clogs too.

Age and Weather Wear

All roofs age. Asphalt shingles lose their granules and become brittle, and the underlying felt weakens. Wood decking can warp and shrink, opening small gaps at the seams. A roof that's 20 years old or older may leak even if it looks fine from the street.

In a humid subtropical climate, heat and moisture cycle constantly, which speeds up that aging. Spring thunderstorms and hail add extra stress. If your roof is older, a water damage inspection can reveal weak spots before they turn into active leaks.

Poor Installation or Repairs

Sometimes a leak comes from work that wasn't done right in the first place. Nails driven too high or too low, underlapping shingles, or missing drip edge all allow water to find a path. Previous repairs that used the wrong materials can fail quickly too.

If you've had roof work done and notice a leak soon after, the installation is a likely suspect. A professional can look at the roof structure and identify where the water is getting in. Fixing the root cause, not just patching the ceiling, is what stops the leak for good.

Need help right now?

Water keeps spreading into floors and walls, so it is worth acting early. Calls are answered 24/7.

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Frequently asked questions

How can I tell where a roof leak is coming from?

Look for water stains on the ceiling, but remember the entry point may be higher up. Water runs along rafters and sheathing before dripping. Check the attic for wet insulation, dark streaks, or daylight showing through the roof deck. That helps you trace the path.

Can I fix a roof leak myself?

Small, simple fixes like replacing a single shingle or resealing a vent boot are possible if you're comfortable on a ladder. But roof work is risky, and a wrong repair can make the leak worse. For anything beyond a quick patch, a professional is safer.

Should I call a roofer or a water damage pro first?

Start by finding the leak's source, which may require a roofer to fix the roof itself. But if water has already soaked into drywall, insulation, or wood, water damage pros handle the drying and repairs. Sometimes both are needed, so ask each what they cover.

Call Now (817) 799-6732