It Wasn't a Basement Backup. So Why Did My Insurer Say No?

I've had more than one client tell me some version of the same thing: "Water only isn't covered if it backs up through the floor drain or the basement, right?" I get why people think that. Sewer and drain backup is the one water exclusion most homeowners have actually heard of, so it becomes the whole mental model. Anything else, they figure, must be a normal covered claim.

A case the Wisconsin Supreme Court decided this summer is a good reason to rethink that.

The Case: Cincinnati Insurance Co. v. Ropicky

The case is Cincinnati Insurance Co. v. Ropicky, decided July 7, 2026. The home is in Waukesha County, built in 2005. On a May morning in 2018, the homeowner woke up to rainwater pouring into the house during a storm. Nothing backed up through a floor drain or a basement wall. The water came in through a one-inch gap in the exterior, a construction defect that had been there since the house was built and had apparently been letting water in for years.

Cincinnati investigated and found two things: a construction defect that let the water in, and fungi growth from years of that water sitting where it shouldn't. The insurer paid out, but far less than the homeowner expected, pointing to two exclusions in the policy: one for damage caused by faulty construction, and one for fungi.

Here is the part worth sitting with. This was not a backup claim, and the insurer still denied most of it. Not backing up through the basement did not automatically mean the water damage was covered. The homeowner and the insurer ended up fighting for years over the actual language of the policy.

The fight came down to something called an ensuing loss exception. Most homeowners policies exclude damage caused by faulty construction or defective workmanship. But many of those same policies say that if a covered kind of damage, like water damage, follows from that faulty construction, the ensuing damage can still be covered even though the original defect is not. The Wisconsin Supreme Court sided with the homeowner on that point, holding that the rainwater damage could count as a covered ensuing loss, separate from the construction defect that let the water in. The court sent the fungi question back for more fact finding, because whether the fungi coverage applied and how much damage it caused were still in dispute.

What This Means for Wisconsin Homeowners

So what does this actually mean for someone reading this at home in Wisconsin?

It means the real question was never "did the water back up." It was "what let the water in, and what does my policy do with that." A construction defect exclusion, a fungi exclusion, and an ensuing loss provision can all apply to the same claim at the same time, and the order you read them in changes the outcome. That is not something most people know is sitting in their policy until a claim forces the question.

First, water intrusion that has been happening slowly for years is a much harder claim than a single sudden event. If you notice a stain, a musty smell, or soft spot near a window, roofline, or the base of the exterior walls, get it looked at now rather than waiting for a bigger storm to force the issue.

Second, ask your agent whether your policy has fungi additional coverage and what it actually covers. In the Ropicky case, that coverage is what kept part of the claim alive. Not every homeowners policy includes it in the same way.

Third, if you are building or just bought a newer home, get a written record of who did the work and keep it. Construction defect exclusions exist because insurers do not want to be your contractor's warranty. Knowing who built or last worked on the parts of your home that touch water, your roof, your siding, your flashing, your foundation, matters more than most people think until there is a claim.

This is a separate question from the water backup and sump pump coverage most homeowners already ask us about, you can see how we set that up on our Home and Auto Insurance page.

If you have water damage and you are not sure whether your policy treats it as covered or excluded, that is exactly the kind of question to bring to us before you assume either way. Coverage on these claims is not a coin flip between "flood" and "backup." It depends on what let the water in and how your specific policy is written.

Frequently Asked Questions

Does homeowners insurance cover water damage that comes in through a wall or window instead of a basement backup?

It depends on what let the water in. If the cause is a covered event like wind driven rain during a storm, it is generally covered. If the water entered because of a construction defect, most policies exclude that defect but may still cover the water damage that follows it under an ensuing loss provision, as the Wisconsin Supreme Court confirmed in 2026.

What is an ensuing loss exception?

It is a policy provision that reinstates coverage for a covered type of damage, like water damage, even when that damage followed an excluded cause, like faulty construction, as long as the ensuing damage is not itself excluded elsewhere in the policy.

Does my homeowners policy cover mold or fungi damage?

Only if you have fungi additional coverage added to your policy. Standard policies often exclude fungi and mold damage except in limited circumstances.

By Toby Hartman, MM Insurance Associates