Why the line matters so much
A typical Florida homeowners policy covers windstorm, often subject to a separate hurricane deductible, and excludes flood. A flood policy covers flood and excludes wind. Each policy pays only the damage its own peril caused. When an adjuster draws the line too high on the wall, wind damage gets labeled as flood and the homeowners carrier pays less. Draw it too low and the flood carrier says the damage was wind. Without careful evidence, the owner can be paid for neither.
The stakes are highest where the damage is extensive: elevated coastal homes, slab-only total losses, and buildings that sat in surge for hours while the wind was still blowing.
How adjusters and engineers separate the two
Insurers commonly send a field adjuster and, in larger or disputed losses, an engineer. They look for physical signatures of each peril:
| Wind signatures | Water signatures |
|---|---|
| Missing or creased shingles, lifted tiles, torn underlayment | Level water line on walls, cabinets, appliances |
| Roof decking or trusses displaced upward or outward | Sand, silt, seaweed or debris deposited inside |
| Broken glazing with debris impact marks | Doors and walls pushed inward at low level; scour around foundations |
| Damage on upper floors, attic and ceilings | Saturated materials only below a consistent height |
| Directional damage matching recorded wind direction | Damage consistent with mapped surge or rainfall flooding |
They also use weather data: measured gusts, the storm's track, surge gauge readings and post-storm high-water marks surveyed by federal agencies. Timing matters. If the strongest winds arrived hours before the surge peaked, damage to the roof and upper structure is hard to attribute to water.
Anti-concurrent causation clauses
Many homeowners policies introduce their exclusions, including the flood or water exclusion, with language along these lines: the loss is excluded "regardless of any other cause or event contributing concurrently or in any sequence to the loss." This is called an anti-concurrent causation (ACC) clause. Its purpose is to defeat coverage for damage that a covered peril (wind) and an excluded peril (flood) both contributed to.
Florida law on this point has two parts:
- Without ACC language, the Florida Supreme Court in Sebo v. American Home Assurance Co., 208 So. 3d 694 (Fla. 2016), applied the concurrent cause doctrine: where covered and excluded perils combine to cause a loss, coverage may exist if a covered peril contributed, and the policy does not clearly say otherwise.
- With clear ACC language, Florida appellate courts have generally enforced the clause as written, so that damage caused jointly by wind and an excluded water peril can be excluded.
Two practical lessons follow. First, read the exact wording of the water exclusion and its lead-in paragraph in your own policy; forms differ from company to company and year to year. Second, an ACC clause only matters for damage both perils actually caused. It does not let an insurer exclude damage that wind alone caused, such as a roof destroyed before the water arrived or ceilings soaked through a wind-created opening on the second floor. The job is to separate those items out with evidence.
The valued policy law and total losses
Florida's valued policy law, s. 627.702, generally requires an insurer to pay the full policy limit on a building that is a total loss from a covered peril. Since 2005, s. 627.702(1)(b) has limited that rule when a loss is caused partly by a covered peril and partly by a non-covered peril: the insurer then owes only the amount of the loss caused by the covered peril. However, if the covered peril alone would have caused the total loss, the full valued-policy rule applies.
In a coastal total loss, that turns into a question of proof: would the hurricane winds alone have destroyed the home? Wind speed data, the condition of nearby structures that did not flood, and the debris pattern are the usual evidence.
Burden of proof, in plain terms
Under an "open perils" dwelling coverage, the owner generally must show a direct physical loss to the insured property during the policy period. The insurer then generally bears the burden of proving that an exclusion, such as flood, applies to the damage it refuses to pay. Exceptions to exclusions and named-peril coverages (often contents) can shift that burden back. In practice, both sides argue from the same photographs, measurements and reports, so the owner's own documentation is often decisive.
How owners protect the wind side of the claim
- Measure the water line in every room and photograph above it. Damage above the line is presumptively not flood.
- Photograph the roof and openings before temporary repairs. Keep removed shingles, flashing or broken glass if safe.
- Collect neighborhood evidence. Photos of homes nearby that had wind damage but no water help show what wind alone did.
- Request the insurer's engineering report and estimate. Under s. 627.70131(3)(e) the insurer must send you any detailed estimate within 7 days after its adjuster generates it.
- Get your own estimate split by cause, so each line item is assigned to wind or flood.
- Keep both claims open. Payment from the flood carrier for a flooded room does not end the homeowners carrier's obligation for wind damage in that room above the waterline.
Watch the language in letters. Phrases such as "damage consistent with flood," "surface water," "storm surge," or "excluded regardless of any other cause" signal a causation dispute. Ask for the full written basis, including the policy provisions relied on, and see what to do when a claim is denied as flood.
Disputing the allocation
For the homeowners side, Florida offers several routes. DFS's free mediation program under s. 627.7015 is available for most personal residential claims, with the insurer paying the cost of mediation. Appraisal, if your policy has an appraisal clause, decides the amount of loss but, in many cases, not coverage questions. Litigation requires the s. 627.70152 pre-suit notice at least 10 business days before filing. For the flood side, NFIP disputes go through a FEMA appeal or federal court within one year of written denial; see the flood insurance claim guide.
Wind vs flood FAQ
Who decides whether damage was wind or flood?
Each insurer makes its own coverage decision, usually based on its adjuster's inspection and sometimes an engineer's report. If you disagree, you can present your own evidence and pursue mediation, appraisal where available, or litigation. Neither insurer's conclusion binds the other.
What is an anti-concurrent causation clause?
It is policy wording that applies an exclusion regardless of any other cause contributing concurrently or in any sequence. In a hurricane, it is used to exclude damage that wind and flood caused together. Florida courts have generally enforced clear ACC language, but it does not exclude damage wind caused on its own.
Does Florida follow the concurrent cause doctrine?
Yes, where the policy does not contract around it. In Sebo v. American Home Assurance Co. (2016), the Florida Supreme Court applied the concurrent cause doctrine to a loss involving both covered and excluded causes under a policy without anti-concurrent causation language.
If my flood insurer paid, can my homeowners insurer still deny everything?
Not automatically. A flood payment covers flood damage. Wind damage, including roof damage and rain through wind-created openings above the water line, remains a question under the homeowners policy and should be documented and claimed separately.
Last reviewed: October 2026. Florida statutes cited are from the 2026 Florida Statutes; NFIP terms from 44 CFR Part 61, Appendix A.