Common Roof Problems in West Michigan

Few regions put a roof through as much as ours. Being downwind of Lake Michigan drives heavy lake-effect snowfall, and our winters swing across the freezing point again and again. Each thaw-and-refreeze cycle expands and contracts every shingle, every seam, every nail, and every flashing joint on the house. That's the single biggest reason a roof rated for 30 years shows real wear here at 15 to 20.

But it's not just winter. Think about what a roof in Grand Rapids sees inside one twelve-month stretch. Single-digit air so dry it cracks your hands. Ice sitting on the eaves for weeks. Then 90-degree sun and humidity thick enough to fog your glasses. Driving rain from the west. Hail. Straight-line wind. Snow load in the hundreds of pounds. Then dry cold again. Every material on the roof responds to that, and here's the part that matters: they don't respond the same way.

Asphalt, steel, aluminum, rubber, wood, sealant. Each one expands and contracts at its own rate, on its own schedule, within its own tolerance. Metal flashing moves faster than the shingles around it. The plywood deck swells with humidity while the fasteners in it don't. A rubber pipe boot flexes while the PVC pipe through it barely does. The sealant between two materials has to stretch and recover with both of them at once, thousands of times a year, and if it's the wrong sealant for those two materials it lets go.

Then there's deflection, which is a different kind of movement. Every structural member on a roof bends under load. A rafter bends under snow. A truss bends. Plywood bends between the rafters. A long span of decking bends more than a short one. And every one of them bends by a different amount, depending on what it's made of, how it's sized, and how far it's spanning. Two-by-four rafters deflect more than two-by-sixes. OSB deflects differently than plywood. A twenty-four-inch rafter spacing deflects more than sixteen. Under a February snow load, the whole roof deck is flexing, and every shingle, every fastener, and every flashing on top of it has to ride that flex without opening a gap. Design a roof without accounting for how its structure moves, or install one on a structure that's already deflecting, and it'll show up as a leak or a failure years later and nobody will connect it to the cause.

A roof is a stack of dissimilar materials on a structure that bends, and all of it has to move together for twenty years without opening a gap. Whether it does comes down to whether the person who put it together understood how each piece behaves against the others. Which flashing detail allows for the movement. Which fastener, in which spot, at what depth. Which sealant, on which surface. Which framing, spanning how far. That's the difference between a repair that holds and one that comes back in three winters. It's the difference between a roof system that was designed and one that was assembled.

Most roof problems here don't appear overnight. They start as something small and easy to miss, and they compound quietly until water finds its way inside. Nearly all of it is catchable early. A look twice a year, once in fall before the snow and once in spring after, turns an expensive surprise into a routine fix.

You don't need a ladder to catch most roof problems early. From the ground, the attic, and your utility bills: