Where a Roof Actually Fails (It's Never the Middle)

The Middle of the Roof Is Rarely the Problem

When a roof leaks, most homeowners look straight at the shingles, and most of the time that's the wrong place to look. Shingles in the open field of a roof, away from any edge or protrusion, are built to shed water and usually do exactly that for their whole service life. The places a roof actually fails are the details: valleys where two roof planes meet and water concentrates, step flashing where a roof meets a sidewall, pipe boots that seal around a vent stack, and the eave line where ice damming forms after a thaw and freeze.

Central Illinois gets exactly the weather that causes that last one. A few warm days melt snow off the upper roof, the meltwater runs down to the cold overhang past the heated part of the house, and it refreezes right at the eave. Ice builds into a dam, water backs up behind it, and it finds its way under the shingles instead of over them. That's why a leak often shows up on an interior ceiling nowhere near where the water actually got in.

The Small Parts That Fail First

Pipe boots are usually the first thing to go on an otherwise sound roof. The rubber collar around a plumbing vent stack cracks from sun exposure years before the shingles around it wear out, and a cracked boot is a direct path for water straight into the attic. Step flashing at a chimney or a wall is the other common failure point, especially if it was ever caulked over instead of properly woven with the shingle courses. Caulk is not a fix for bad flashing. It buys you a season, maybe two, and then you're right back where you started.

Attic ventilation plays a bigger part in ice damming than most homeowners expect. A roof that's venting warm attic air poorly will melt snow unevenly across its surface, warm near the ridge and cold near the eave, which is exactly the setup that builds an ice dam in the first place. Balanced intake at the soffit and exhaust at the ridge keeps the whole roof deck closer to outdoor temperature, so snow melts more evenly instead of refreezing right where the roof meets the gutter. It's a detail that has nothing to do with the shingles themselves and everything to do with whether they last.

The First Hour After Storm Damage

• Get photos of the damage from the ground, and from a ladder if it's safe, before anything gets covered or cleaned up.
• Cover any active interior leak with a tarp or a bucket to limit further damage inside the house.
• If shingles or debris landed in the yard, keep them. Your insurer will want to see the actual material, not just a description of it.
• Call for a free estimate before signing anything with the first contractor who knocks on your door after a storm.
• Stay off the roof yourself. A storm-damaged deck can be far less solid than it looks from the ground.

Tear-Off or Go Over the Top

When it's time to replace a roof, the first real decision is whether the old roofing comes off or a new layer goes over it. Going over the top costs less up front, but it hides whatever condition the decking is in underneath, and it hides the beginning of the same valley and flashing problems that likely caused the original leak. A tear-off lets us see the decking, replace any sections that have gone soft, and start every valley and flashing detail clean. We handle both new roof construction and full tear-off replacement, in shingles or metal, and we'll tell you honestly which one your roof needs rather than which one is cheaper to sell.

Siding After a Storm, and What We Carry

Siding takes the same kind of storm damage a roof does: hail dents, wind-lifted panels, cracked corners, and it needs the same honest look before a repair gets patched over a bigger problem. We repair and replace vinyl, wood and metal siding, and every estimate is free. C.B.E. Construction is licensed with the State of Illinois as a roofing contractor under license #104-001-614, our installers are GAF certified, and we're EPA lead-safe certified for work on older homes. Roofing and siding work doesn't carry a stated guarantee length the way our other service lines do, and we'd rather be straight with you about that than promise a number that isn't real.