Drought Coverage Denied: the Court of Cassation Ruling that Changes the Rules of the Game

The February 12, 2026 ruling: the end of automatic compensation

A homeowner in the Gard region, 2016-2017 drought cracks, Cat-Nat recognitions in hand — and yet the supreme court overturned the ruling against insurer MMA IARD. Reason: the appeals court had not verified whether she had taken "the usual measures to prevent such damage" required by Article L. 125-1, paragraph 3 of the French Insurance Code.

A homeowner in the Gard region. Cracks linked to the 2016-2017 droughts. Two Cat-Nat decrees recognizing the damage. And yet the insurer (MMA IARD) refused to pay compensation. The Nîmes appeals court ruled against it. But on February 12, 2026, the Court of Cassation overturned that decision.

Official reason: the appeals court had not verified whether the policyholder had taken "the usual measures to prevent such damage" — the wording of Article L. 125-1, paragraph 3 of the Insurance Code.

What this means in plain terms: even with a Cat-Nat decree in hand, your insurer can refuse to pay if you haven't taken preventive measures. Cat-Nat recognition is no longer an absolute guarantee. It's a shock for millions of homeowners who thought that condition alone was enough to be covered.

"Reasonable measures" that nobody really defines

Here's the trap: no legal text concretely lists these "usual measures to be taken." Neither the Insurance Code, nor the 2024 Cat-Nat circular, nor any prior case law specifies the homeowner's obligations.

What case law tends to include, on a case-by-case basis: rainwater management (checking that gutters and downspouts drain far from the building, that the land slope facilitates drainage), vegetation maintenance (pruning trees that are too close, avoiding planting foliage directly above the foundations), and adapting the immediate surroundings (filling in depressions, installing a root barrier if a large tree is too close).

But what isn't written down? How to measure the effectiveness of a measure. When it becomes "mandatory." And above all: who decides, after the fact, in the event of a claim, that you didn't do "enough"?

The tragic irony: you're required to follow rules that aren't written down anywhere. It's precisely this ambiguity that lets an insurer deny compensation while staying within the law. The judge, meanwhile, must verify that you took these measures — but how do you verify something that isn't defined?

Soil hydro-stabilization: a preventive measure that holds up legally

The TerraStab diagnosis, as you know, identifies two things: your official RGA risk level, and whether or not installing a hydro-stabilization solution is worthwhile.

But why is hydro-stabilization an irrefutable preventive measure? Because it acts directly on the cause of the damage: the shrink-swell cycles of clay soil beneath the foundations. Concretely, a system like TerraStab's continuously regulates soil moisture — it prevents the wet/dry oscillations that create the differential movements responsible for cracks.

Unlike simple gutter maintenance or occasional pruning, this is a technical intervention: installed by professionals, with proof of completion; documented in a technical report; with before/after measurements (soil moisture, water content); permanent and verifiable at any time by an expert.

Before a judge or insurance expert, this carries far more weight than an intention. It's tangible proof that you acted rationally to prevent the damage.

The TerraStab diagnosis: building a case before your insurer asks questions

The diagnosis is free. No one is obliged to install anything — and indeed, that's the case for over 95% of homeowners in RGA zones.

But here's where the strategic value of the diagnosis lies, in light of this February 12, 2026 ruling: the diagnosis isn't limited to recommending a TerraStab solution or not. It also covers a complete analysis of aggravating factors: condition of the water drainage system (gutters, slopes, infiltration), presence of vegetation too close to the foundations, need for a root barrier, land layout and microclimate around the building.

And above all: all these recommendations are documented in a written report issued by TerraStab. This report traces your approach.

TerraStab doesn't issue a legal "stamp of approval," and doesn't guarantee the outcome of a dispute with your insurer. That's not our role. However, here's what this file concretely provides: you formally learned about your RGA risk; you received precise, technical prevention recommendations; you followed them — and the report documents that follow-through.

Given the vague definition of "reasonable measures," it will be difficult to characterize such an approach as negligent or insufficient. It's not a guarantee — it's a body of concrete, documented actions that speaks in your favor.

What this concretely changes for you

If you're in an RGA zone and have done nothing: you're vulnerable in the event of a claim. An insurer may refuse coverage citing the absence of preventive measures. The February 2026 ruling opened that door.

If you have a TerraStab diagnosis and followed its recommendations: your approach is documented, traceable, and hard to characterize as negligent. You acted. That's what the law requires — and that's what your file demonstrates.

If you've installed a hydro-stabilization solution: you acted directly on the cause of the damage, permanently and with documentation. That's a solid argument — hard to dispute as "unreasonable" — without being an absolute guarantee of coverage.