How to Document Water Damage for an Insurance Claim

In our experience across thousands of Ontario water damage jobs, claims that fail or are underpaid almost never fail because the event did not happen or because the damage was not real. They fail because the documentation was missing, incomplete, or described the wrong flooding mechanism — triggering the wrong endorsement review, or no endorsement review at all.

Here is the documentation process that produces first-submission approvals at all major Ontario insurers.

Why Documentation Determines Whether Your Claim Pays

Your insurance adjuster was not in your basement during the flood. They did not see the floor drain overflow or the pipe burst or the window well flood. Everything they know about your event comes from your documentation. If that documentation correctly identifies what happened, when it happened, what was affected, and how it was repaired, the adjuster has everything needed to approve your claim.

If the documentation is vague, wrong about the mechanism, or missing key components, the adjuster has to ask questions — and every question is a delay and an opportunity for the claim to be reduced or denied on a technicality.

The key insight: the purpose of insurance documentation is not just to prove the damage happened. It is to prove which policy endorsement applies. A sewer backup claim and an overland flooding claim use different endorsements. Documenting them interchangeably, or failing to identify the mechanism, means your adjuster cannot determine which endorsement to apply — and will often apply the less favorable one, or deny the claim pending further information.

What to Document Immediately After the Event

Before anything is moved, cleaned, or thrown away:

Video walkthrough

Walk through the entire affected area with your phone camera recording. Narrate what you are seeing. State the date and time. Show the water level, the entry point, what items are affected. This video is often the most useful single piece of evidence in a claim — it shows the event as it was.

Still photos — specific shots

• Wide shots of the entire affected area
• Close-up of the floor drain or entry point
• Water level marks on walls if visible
• Each affected appliance, piece of furniture, and structural element
• Any visible sewage indicators if applicable (this supports the Category 3 / sewer backup endorsement)

The date and time record

Make sure your phone photos have timestamps enabled. Text yourself or email yourself a short note with the date, time, and one-line description of what you discovered. This timestamp record is useful if there are questions about when you became aware of the event.

Documentation During Restoration

When a professional restoration company handles your job, their documentation becomes your insurance evidence. This is what you should expect from your restoration company:

• Initial assessment report: Written documentation of the flooding mechanism (sewer backup, pipe burst, overland flooding, etc.), affected areas, and assessment findings — including thermal camera images if used
• Moisture reading log: Daily moisture readings from all affected surfaces, with timestamps. This demonstrates that materials were dried to IICRC-standard levels and prevents claims that mold resulted from inadequate drying
• Photo documentation: Before and after photos of all affected areas, equipment placement documentation, and final clearance photos
• Scope of work: Itemised list of everything done — extraction, drying equipment type and placement, antimicrobial treatment, materials removed and why

The Final Documentation Package

When we submit documentation for a client's insurance claim, the package includes:

1. Initial assessment report with flooding mechanism identification
2. Thermal camera images showing moisture extent at time of assessment
3. Daily moisture reading logs with before/after moisture levels for each affected surface
4. Photo documentation (before, during, after)
5. Scope of work with itemised labour and materials
6. Thermal camera images at clearance showing all areas at acceptable moisture levels
7. Certified clearance report confirming pre-loss condition restoration

For Oakville properties in Conservation Halton flood hazard zones, we also include zone context documentation. For Toronto properties in creek watershed corridors, we include neighbourhood flood risk context where relevant to the claim.

The Most Common Documentation Mistakes

• Wrong mechanism identification: Describing overland flooding as sewer backup or vice versa — this triggers the wrong endorsement review
• No photos before cleanup: Cannot be recovered after the fact
• Delayed reporting: Most Ontario policies require prompt reporting. Waiting weeks to report a known event can void coverage
• Discarding damaged items before documenting: Damaged items are claim evidence. Document everything before disposal
• Incomplete scope: Failing to document Category 3 decontamination scope separately from standard drying — these have different valuation frameworks in insurance adjusting
• No final clearance: Without a certified clearance report, an adjuster cannot confirm that the restoration was completed to standard. Claims without clearance documentation are frequently delayed or reduced

When we handle your insurance claim assistance, every one of these mistakes is eliminated by our standard documentation process. Our track record of first-submission approvals across Intact, Aviva, TD, Desjardins, Economical, and Wawanesa is a direct result of documentation that leaves no questions unanswered.