Wind damage is covered by a standard homeowners policy. Rising water is not. Those two sentences determine the outcome of the most consequential insurance decisions homeowners on the Boston coastline and South Shore make after a major storm, and the fact that wind and water often arrive together in the same nor’easter is exactly what makes the distinction so contested. If your roof is torn off by wind and your basement fills from storm surge in the same event, those are two separate losses routed to two separate policies, and the documentation for each must stand on its own. Getting that documentation right before the adjuster arrives is what protects a full payout. A single storm can produce both causes of loss; understanding how carriers evaluate each one changes how you approach the claim from the first phone call.
Why Do the Two Perils Route to Two Separate Policies?
The exclusion of flood damage from standard homeowners policies has a specific actuarial history. Flood losses are geographically concentrated along coastlines and floodplains, which means the risk pool that would fund flood coverage is far narrower than the nationwide pool that funds wind coverage. Private carriers withdrew from offering flood coverage broadly after catastrophic losses in the mid-twentieth century, and the National Flood Insurance Program was established in 1968 to fill that gap. Today, flood coverage for homes in high-risk zones requires a separate NFIP policy or a private flood carrier, at a cost that is entirely separate from the homeowners premium.
This structure means that a nor’easter hitting the Scituate seawall simultaneously produces wind damage claims on homeowners policies and flood damage claims on NFIP policies for the same properties. The Insurance Information Institute reports that wind and hail account for approximately 40 percent of all homeowners insurance claims nationally, making it the most common cause of loss in the country. Flood is not counted in that figure because it runs on a separate policy system entirely. When both perils strike together, which is the recurring reality on coastal South Shore streets, the homeowner must document and submit to both systems simultaneously.
Where the Line Is Drawn: Wind-Driven Rain vs. Rising Water
The critical distinction that determines which policy pays is the mechanism of water entry, not the storm that produced it. Wind-driven rain that enters through an opening the wind created, a blown shingle, a cracked window, a failed flashing, is generally treated as wind damage under a homeowners policy. The water arrived because the wind breached the envelope; the water is a consequence of a covered wind peril.
Rising water is categorically different. Storm surge, tidal flooding, the overflow of any body of water onto normally dry land, and water that backs up from a storm drain system are all defined as flood under NFIP policy language. If the water came up from below, across the ground, or through the foundation rather than through a breach the wind created, it is flood. The physical direction of water travel is often the deciding evidence: water infiltrating through a blown window opening above grade reads as wind damage; water coming through a foundation wall at below-grade level reads as flood, regardless of what storm produced it.
Coastal properties in Hull, Scituate, and along the Quincy shore face this question after every significant nor’easter. A home may have genuine wind damage to the roof and siding from the same storm that sends harbor water over the seawall and across the first floor. Each source of damage requires its own documentation stream. Our coastal flood damage team and our roofing crews run these scopes simultaneously rather than filing a single combined claim that carriers can pick apart.
Concurrent Causation: The Clause That Can End a Claim
The most treacherous territory in storm claims involving both wind and water is concurrent causation. Many homeowners policies include an anti-concurrent causation clause, which states that if an excluded peril, flood, contributes to a loss in any way, the entire loss under that homeowners policy may be excluded, even for the portion caused by the covered wind peril. The exact language and enforceability of these clauses varies by policy and state, but Massachusetts courts have addressed these disputes in coastal storm contexts, and the outcomes depend heavily on how well the two causes of loss are separated in the initial claim documentation.
The practical defense against concurrent causation exclusions is meticulous separation of the damage scopes. If the wind damage to the roof and siding is documented, photographed, and scoped entirely independently from the flood damage to the basement and first floor, the carrier cannot plausibly argue that the excluded flood peril caused the wind damage. That separation requires a restoration team that understands both causes of loss and can build two distinct evidence records from the same property on the same day. Our storm flood cleanup process explicitly separates the rising-water scope from any wind damage scope we build on the same property, so each carrier receives a coherent and self-contained submission.
What Does Your Adjuster Need to Separate the Scopes?
Adjusters evaluating a combined wind-and-flood loss are looking for documentation that establishes both the mechanism of entry and the physical boundary of each cause’s damage. For the wind claim: photographs of every breach before it is covered, with timestamps, the debris field showing what the wind did to the exterior envelope, and the interior damage path from each opening traced into the structure. For the flood claim: exterior high-water marks on the foundation and siding, evidence of the water source, and interior documentation that distinguishes rising-water intrusion at grade or below from wind-driven rain entering above grade.
“The claim is won in the documentation before the first tarp goes on,” says owner Ansy Chevalier, IICRC certified restorer (#70268689), who scopes storm losses in Xactimate and meets adjusters on site. That documentation is not something a homeowner can effectively reconstruct after the fact. The evidence is in the breach, the debris pattern, the water mark heights, and the directional indicators of water travel, all of which get cleaned up or covered in the first 24 hours of mitigation. Our insurance claims process page walks through how we build the dual-scope submission from the first dispatch through the adjuster meeting.
| Damage type | Policy that covers it | Key documentation |
|---|---|---|
| Roof and siding torn by wind | Homeowners policy | Breach photos before tarping, debris field, wind-driven rain entry path |
| Window broken by wind-driven debris | Homeowners policy | Impact point, glass pattern, rain entry through the opening |
| Storm surge flooding first floor | NFIP or private flood policy only | High-water marks at exterior and interior, water source direction, time-stamped photos |
| Basement water from rising water table or drain backup | NFIP or private flood policy; sewer backup rider if applicable | Entry point elevation, exterior water level, ground saturation evidence |
| Interior ceiling damage from wind-breached roof | Homeowners policy (wind as proximate cause) | Continuous path from roof breach to ceiling, no rising water involved |
Coverage determinations depend on specific policy language and adjuster findings. The table above reflects common treatment, not a guarantee of coverage. Your policy controls the outcome.
Last updated August 2026.
Storm just hit and you have both wind and water damage? Do not file one combined claim. Call (781) 390-9855 and let Studio 24 build two separate documentation scopes before anything is covered or cleaned up. We meet your adjuster on site and bill all carriers directly. Free inspection, no upfront cost on covered work.
Working through a related situation? We also cover shingles blown off in a storm and outage-driven basement flooding.