Metal Roofing in Midwest Weather: Wind, Snow, Ice, and Hail

Roofs in Indiana, Ohio, and Michigan get tested by everything. Straight-line wind in spring, heavy snow and ice in winter, hail in any warm month, and freeze-thaw for five months a year. Metal handles all of it well, but only when it is installed for these conditions. Here is how each one plays out, including the parts that should shape your expectations.

Wind

Wind peels asphalt shingles off one tab at a time. A standing seam roof has no exposed edge for wind to catch: the panel is hooked over the eave trim, held by concealed clips down its length, and locked to its neighbors at the seams. An interlocking metal shingle is held by the shingles around it, not just its own fasteners.

The systems we install are tested to wind speeds of 140 miles per hour. I would read that number the way it is meant: it describes the panel and its attachment in a test, not a promise about your house in a storm. Wind finds the weak install, not the strong material. A loose eave trim or a missing closure is where a roof starts to come apart, and that is workmanship.

Snow

Metal sheds snow rather than holding it, which keeps load off the structure over a long winter. That is good and it creates one responsibility: on some roofs, snow will let go all at once. Over a doorway, a walkway, a deck, or a gas meter, that is a hazard. Snow retention, small guards or a bar fastened to the seams, holds it so it melts in place. Where it is needed is a site decision, and a quote should raise it rather than leave you to find out in January.

Ice dams

An ice dam forms when heat from the house melts snow on the upper roof and it refreezes at the cold eave, building a ridge that backs water up under the roofing. Metal resists this better than shingles because water has fewer places to get in, but the panel is not the whole answer. The underlayment at the eave, high-temp peel-and-stick run up past the interior wall line, and the attic ventilation that keeps the roof cold are what decide whether an ice dam shows up on your ceiling. This is where installation quality matters more than material choice. A metal roof over a badly ventilated attic still gets ice dams.

Hail

Here's where expectations matter. Impact resistance depends on the profile and thickness of the metal. Our systems carry a UL Class 4 impact rating, the highest available, which is a test of whether the panel cracks or loses function under a steel ball of a given size. A small cosmetic dent is not a leak, and many insurers give a discount for an impact-rated roof.

But no roof is dent-proof, and I would rather tell you now than have you surprised later. A broad flat standing seam pan in a dark gloss will show a large hail event. A textured metal shingle or stone-coated panel hides it better. If a dent-free surface forever is your expectation, metal will not meet it. If a roof that keeps working after hail is the goal, it is a strong choice. Asphalt in the same storm loses granules and starts its decline.

Freeze-thaw and movement

A metal panel expands and contracts with every temperature swing, and we see 100-degree swings across a year. Concealed clips let it move. An exposed-fastener roof makes that movement at the screw, which is why those washers wear on a schedule and why I steer long-term homeowners away from that system here.

Who should weigh this

Metal is well suited to this climate. It is not maintenance-free, and it is not immune to a dent. What it is, installed correctly for our weather, is a roof that keeps doing its job through the exact conditions that wear other roofs out.

If you want a roof that never shows a mark, or if you are in a short-term home, the weather case does not justify the cost for you. If you plan to stay through 30 more winters, it is most of the reason to do this once.

That is the tradeoff, laid out plainly.