Two dented school roofs that never leaked have handed insurers a fresh warning about cosmetic damage exclusions. 

A hailstorm struck two Minnesota schools in April 2022, denting their metal roofs. The metal never punctured, and neither roof has leaked since. Even so, the fight over whether those dents count as covered damage has now narrowed how a common exclusion is read in the Eighth Circuit. 

Cannon Falls Area Schools filed a hail claim with The Hanover American Insurance Company (Hanover). Hanover denied it, citing a cosmetic damage exclusion. The policy covered "direct physical loss of or damage to" the buildings "caused by or resulting from" hail. The exclusion carved out "cosmetic damage to roof surfacing caused by wind and/or hail" - defined as "marring, pitting or other superficial damage that altered the appearance of the roof surfacing," but only where that damage "does not prevent the roof from continuing to function as a barrier to entrance of the elements to the same extent as it did before." 

The school district argued the dents left the roofs weaker. Its expert said the roofs "will not resist the wind loads or snow loads that are common for the Cannon Falls area." Hanover's expert disagreed, testifying that the dents had not reduced the roofs' ability to withstand wind or snow. 

A federal district court sided with Hanover, reading the exclusion to apply unless a roof had actually leaked or let in the elements. With no evidence of leaks, it granted the insurer summary judgment. 

On July 27, 2026, the Eighth Circuit vacated that ruling and sent the case back. The court agreed the policy looks at a roof's present function, not its future lifespan. But it held the exclusion measures damage by degree. If a roof that once held three feet of snow can now hold only two, it no longer keeps out the elements "to the same extent" as before - even without a leak. 

Exclusion wording that turns on function "to the same extent" may not require proof of a leak or breach; weakened load capacity alone can revive a claim. If a carrier wants to cover only damage that already let the elements in, the court said, it "must do so with unambiguous language." 

One judge dissented, arguing federal courts should follow other jurisdictions that require proof of actual intrusion. The court did not decide whether the claim is covered - it returns to the district court for further proceedings.