5 Signs of Hidden Roof Damage You Shouldn’t Ignore After the Kansas Storms

American Commercial Roofing  |  Serving Kansas & Beyond  |  April 2026

When a tornado tears through your neighborhood, the most dramatic damage is impossible to miss — toppled trees, collapsed walls, debris scattered for blocks. But the damage that causes the most long-term trouble for homeowners is often the kind you can’t see from the ground.

After the April 13 tornado outbreak that struck Ottawa, Hillsdale, Spring Hill, Pomona, and other eastern Kansas communities, many homeowners whose homes are still standing may be thinking, “We got lucky — the roof looks fine.” And it might look fine. But looking fine and being fine are two very different things when it comes to your roof.

Here are five signs of hidden storm damage that every homeowner in the affected area should know about — because catching these early is the difference between a manageable repair and a costly surprise six months from now.

1. Granule Loss in Your Gutters and Downspouts

This is one of the most common — and most overlooked — signs of hail and wind damage to an asphalt shingle roof. Those small, sand-like granules that coat the surface of your shingles are there for a reason: they protect the underlying asphalt from UV radiation and weather exposure. When a storm strips them away, your shingles start deteriorating much faster than they should.

After the storms, take a look inside your gutters and at the bottom of your downspouts. If you see a noticeable accumulation of granules — it looks like coarse, dark sand — that’s a strong indicator that your shingles took a beating. Some granule loss is normal over the life of a roof, but a sudden, heavy deposit after a storm is not.

The tricky part is that granule loss doesn’t change how your roof looks from the street. Your shingles will still be in place, still the same color from a distance. But up close, the protective surface is compromised — and that means accelerated aging, cracking, and eventual leaks.

2. Dented or Damaged Soft Metals Around Your Home

Your roof isn’t the only thing the storm hit. Look at the soft metals around your property — aluminum gutters, downspouts, window frames, garage doors, and outdoor HVAC units. If you see dents, dings, or dimples in any of these surfaces, your roof almost certainly sustained similar hail impacts.

Hail that’s strong enough to dent aluminum is strong enough to damage shingles. The April 13 storms brought large hail along with the tornadoes, and even areas that didn’t take a direct tornado hit may have experienced damaging hailstones. In fact, many insurance claims from Kansas storms are hail-related rather than wind-related — and hail damage to shingles is nearly invisible from the ground.

If your gutters, mailbox, or AC unit show signs of hail impact, treat that as a strong signal that your roof needs a professional inspection.

3. Subtle Interior Water Stains or Musty Odors

Sometimes the first evidence of roof damage doesn’t appear on the roof at all — it shows up inside your home. Small ceiling stains that weren’t there before the storm, faint discoloration on upper walls, or a new musty smell in the attic or upstairs rooms can all point to water getting in through compromised roofing.

Here’s why this matters: water intrusion from a damaged roof doesn’t always show up immediately. If the storm cracked a shingle or loosened a piece of flashing, the leak may be small — just enough to dampen the insulation or decking a little with each rain. You might not see a stain on the ceiling for weeks. But by the time that stain appears, moisture has already been sitting in your roof structure, potentially encouraging mold growth and wood rot.

Walk through your home and pay close attention to ceilings in rooms directly below the roofline. Check the attic if you can access it safely — look for daylight coming through where it shouldn’t, damp insulation, or dark water marks on the underside of the roof deck. These are early warnings that something above is no longer keeping water out.

4. Lifted, Curled, or Creased Shingles

Tornado-strength winds — and the April 13 Ottawa tornado hit 125 mph — don’t always rip shingles clean off the roof. What they frequently do is lift shingles just enough to break the adhesive seal that holds them flat. Once that seal is broken, the shingle may settle back down and look normal from a distance, but it’s no longer properly attached.

Lifted shingles are vulnerable to the next storm. They catch wind more easily, and they create gaps where water can work its way underneath. Over time, lifted shingles curl at the edges or develop creases where the wind bent them — and those creases become weak points that crack and leak.

This type of damage is almost impossible to spot from the ground. It requires a close-up, on-roof inspection by someone who knows what they’re looking for. If your home is within a few miles of the confirmed tornado paths — even if you think you only got “the edge” of the storm — there’s a real chance your shingles were affected.

5. Damaged Flashing, Vents, or Roof Penetrations

The places where things come through your roof — pipe boots, exhaust vents, skylights, chimney flashing — are always the most vulnerable points in any roofing system. They’re also the places where storm damage does the most sneaky work.

High winds can bend or dislodge the metal flashing around chimneys and roof edges. Flying debris can crack plastic pipe boots or knock vent caps loose. Even the rubber gaskets around plumbing penetrations can be degraded by severe hail. Any of these small failures creates a direct path for water to enter your home — and none of them are visible from the ground.

This is one of the biggest reasons a professional post-storm inspection is so valuable. A qualified inspector checks every single penetration point, every piece of flashing, every vent and boot on the roof. These are the details that an untrained eye — or a quick glance from the driveway — will always miss.

Why a Free Inspection Is the Smartest Move You Can Make Right Now

Here’s the reality: the April 13 storms were severe. Nine confirmed tornadoes, EF-2 wind speeds, large hail, and widespread damage across multiple Kansas counties. If your home is anywhere in the affected region, the question isn’t whether you should get your roof inspected — it’s how soon.

A professional inspection takes the guesswork out of the equation. You’ll know exactly what condition your roof is in, whether you need repairs, and what documentation to bring to your insurance company. And if your roof came through the storm without damage? You’ll have peace of mind — and a written report that says so.

At American Commercial Roofing, we’re offering free storm damage inspections for homeowners across eastern Kansas. We’ve been serving Kansas from our home base in St. Marys for years, and we’re committed to helping our neighbors recover from this storm the right way — with honest assessments, quality work, and no high-pressure sales tactics.

Don’t wait for a small problem to turn into an expensive one. The damage you can’t see is often the damage that costs the most to fix later.