Scope disputes

Storm water is not automatically Category 3, and the standards body said so in writing

Most disputes on a water damage claim are not about whether you are covered. They are about scope, and on a water loss scope is mostly one decision made in the first hour by one person: what category is this water?

In March 2026 the body that maintains the standard that decision is made under published a position statement correcting a reading of its own text that had been costing people money. It is three pages long, it is freely available, and almost no homeowner knows it exists.

Why the category decides the invoice

Restoration work in Canada is carried out against ANSI/IICRC S500, Standard for Professional Water Damage Restoration, fifth edition, 2021. It sorts every loss by the category of the water — how contaminated it is — and that sorting has a direct physical consequence.

Category 1 is clean water from a sanitary source, and materials are generally dried in place where they can be. Category 3 is, in the standard’s own words, water that is

grossly contaminated and can contain pathogenic, toxigenic or other harmful agents and can cause significant adverse reactions to humans if contacted or consumed

Porous materials that have taken Category 3 water are generally not dried. They are removed. Drywall, carpet, underlay, insulation — out, to a height, and then rebuilt.

That is most of the difference between a drying invoice and a demolition-and-rebuild invoice. One judgement, made early, by somebody standing in your basement.

The sentence that was being over-read

The standard’s Category 3 definition lists examples, and one of them reads:

Examples of Category 3 water can include, but are not limited to: sewage; waste line backflows that originate from beyond any trap regardless of visible content or colour; all forms of flooding from seawater; rising water from rivers or streams; and other contaminated water entering or affecting the indoor environment, such as wind-driven rain from hurricanes, tropical storms, or other weather-related events.

Read quickly, that appears to say weather-driven water is Category 3. Restorers were reading it that way, and a roof leak during a storm was coming back scoped as a removal job.

What the consensus body actually said

The position statement of 16 March 2026 opens by stating the conclusion:

Top-down water ingress, wind-driven rain and water from weather related events are not automatically considered Category 3 Water.

The reasoning turns entirely on the word can, which the standard defines for itself in its own Important Definitions section:

when the term can is used in this document, it signifies an ability or possibility open to a user of the document, and it means that a referenced practice or procedure is possible or capable of application but is not a component of the accepted “standard of care” to be followed.

So the example establishes a possibility, not a rule. The statement goes further and names what the example is actually about: in that sentence, contaminated water entering the structure is the primary consideration, and Category 3 is defined as grossly contaminated. The example “does not apply when water is not ‘grossly contaminated,’ regardless of how it entered the structure.”

What is supposed to happen instead

The statement sets out the process, which is the useful part for a homeowner because it is checkable.

The standard defines an inspection as “the process of gathering information needed to determine the category, condition, class or status of a water intrusion, building material, assembly or system”. It defines a preliminary determination as the “process performed by the restorer to establish the category of water for the purpose of establishing a scope of work”.

A restorer can determine Category 3 when the inspection and information gathering actually discover a grossly contaminated condition. Not because it rained.

What to do with this

If a storm-related leak has come back scoped as Category 3 with no contamination finding behind it, three questions are reasonable and none of them are aggressive:

1. What category did you determine, and what was the preliminary determination based on? The standard says this is a determination made after an inspection, so there is an answer.
2. What contamination was found, and where? The test is whether the water is grossly contaminated, not how it got in.
3. Have you seen the March 2026 consensus body position statement on weather-related events? It is published by the body that writes the standard they are working to, and it is linked in the sources below.

None of that is a reason to be difficult with a restorer who is right. Sewage is Category 3, a river coming through a basement window is Category 3, and a restorer who scopes those as drying jobs is the more dangerous error. It is a reason to know that the category is a judgement with a documented basis rather than a fact about the weather.

And the reason this is worth your time

The Insurance Bureau of Canada notes that policyholders are responsible for any difference if a contractor’s charges exceed the insurer’s estimate. So the scope is not an argument between your restorer and your insurer that you get to watch. When the two numbers diverge, the gap is yours.

Which makes the question of what is being removed, and why, about as directly financial as a question gets. Our cost page sets out the seven things to ask for so that two quotes actually describe the same job.

Category is not the only axis, and the other one gets confused with it

A second source of scope confusion is worth separating out, because the two words sound similar and mean different things.

Category describes how contaminated the water is. Class describes how hard the loss will be to dry — roughly, how much wet material there is relative to the volume of the space, and how much of it is the kind of material that holds water.

They vary independently. A small, clean supply-line leak into a room with a concrete floor is Category 1 and easy to dry. A large clean leak into a space full of insulation and particleboard is still Category 1 and much harder. A sewage backup across the same concrete floor is Category 3 and, in pure drying terms, not especially difficult — but the material is coming out regardless of how easy it would have been to dry, because of what was in the water.

So “this is a big job” and “this is a dirty job” are separate claims, and a scope that has escalated on both at once is worth two separate questions rather than one.

What the standard says should already have happened

The position statement quotes the standard’s initial-response requirements, and they are useful to a homeowner as a checklist for whoever is standing in the basement. The restorer should, at minimum:

• conduct a site specific safety survey;
• identify customer priorities and concerns;
• verify the source of water intrusion;
• identify the extent of the water migration;
• arrive at a preliminary determination;
• identify pre-existing damage;
• identify immediate secondary damage concerns; and
• establish dry standards and drying goals.

Two of those are worth dwelling on.

“Establish dry standards and drying goals” means there is supposed to be a target that the drying is measured against, not a general intention to run fans until things feel dry. If nobody can tell you what the goal is, nobody can tell you when the job is finished either.

“Identify pre-existing damage” protects both sides, and it is the one most often skipped. The water stain that was already on the ceiling before Tuesday is much easier to establish on Tuesday than in week three.

The standard also lists what should be gathered on the first phone call — structure type and use, the source and the date and time of the intrusion, the status of water source control, the general size of the affected areas, suspect or known contaminants, the history of previous water damage, the types of materials affected, the age of the structure, and the number of occupants. Being asked those questions is a good sign. Not being asked any of them is information too.

The part that makes this worth knowing

None of this requires a homeowner to argue about a standard they have not read. It requires one question, asked without heat: what category did you determine, and what was it based on?

If the answer describes an inspection and a contamination finding, that is the process working, and the scope is probably right even when it is expensive. If the answer is that it came in through the roof during a storm, the March 2026 position statement says that on its own is not the test — and it is linked below, published by the body that writes the standard.

All notes · What is leaking · Insurance · Cost