Roofing Contractor in Monona, WI

That One Construction Co. is a roofing contractor working with homeowners throughout Monona. Whether hail damaged your roof this spring or it’s simply time for a second look, we start with a free inspection and tell you plainly what we find. Monona sits right on the shore of Lake Monona, a small, fully built-out lakefront city that’s been an established part of the area for decades. It also carries one of the older population profiles in the region, and homes that have had more time to accumulate wear tend to come with more questions about what’s actually going on up top. Homeowners here usually want a straight answer, not a sales pitch.
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Two Reasons Monona Homeowners Call a Roofing Contractor

In Monona, the calls we get tend to fall into two buckets: hail or storm damage that’s tough to spot from the ground, or a roof that’s simply old and due for a look. We handle both the same way, starting with a free inspection and an honest answer about roof repair versus roof replacement. We hold to the same 50% threshold insurance companies use for a total loss determination, so nothing gets replaced before it needs to be.

The Grapefruit-Sized Hail That Hit Monona in April 2026

On the evening of April 14, 2026, Monona took a direct, repeated hit from one of the more severe hailstorms confirmed anywhere in this part of Wisconsin. Hail fell in waves over several hours, starting around ping-pong-ball size just after 5 PM and growing through hen-egg size before a peak report of 4-inch, grapefruit-sized hail confirmed just after 6:30 PM, the largest single hail size confirmed anywhere in this entire research project.

A storm like that doesn’t leave a roof looking the same as it did the day before, even when the damage isn’t obvious from the driveway. A roof-level inspection is the only way to know what’s actually there.

Monona Code Classifies Your Roof as "Impervious Surface"

Monona’s city code has an unusual detail buried in its stormwater and erosion control rules: a roof is explicitly classified as impervious surface, the same category as pavement and driveways, because of how it sheds water toward Lake Monona. That’s a stormwater rule, not a roofing rule, but it says something about how seriously this city pays attention to what happens on top of its buildings.

The actual building permit is handled through General Engineering Company, a contracted firm that staffs the Building Inspection office at City Hall three mornings a week. Every reroof still has to meet Wisconsin’s Uniform Dwelling Code, including ice and water shield on any slope of 4:12 or less, extending at least 30 inches up-slope from the eave and 12 inches past the interior wall face. We pull the permit and schedule the inspection as part of the job, so it’s one less thing on your plate. 

Why That One Construction Co. Is the Right Monona Roofer

About 80% of what we do is insurance claim work, and we keep staff whose only daily job is talking to insurance companies, not just answering the phone when one calls. After a hailstorm the size of the one that hit Monona this spring, having someone dedicated to that conversation matters. We’re on-site for the adjuster’s visit, and we don’t let an underpaid estimate go unchallenged.

Once a job is scheduled, we send a prep email walking you through what to expect and how long the work will typically take, usually a day, sometimes two depending on the roof.

Your Monona Roofing Company

That One Construction Co. serves Monona and the surrounding area, including Madison, McFarland, and Maple Bluff, for roof repair, roof replacement, and free roof inspections. If this spring’s hail has you wondering about your roof, or it’s simply been a while since anyone looked at it, call us and we’ll walk it and give you a straight answer.

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