Many homeowners find out when they look at their insurance policy, after basement water damage, that their infiltration was simply not covered. In Canada, standard home policies almost always exclude certain causes of infiltration unless a specific endorsement has been added. Understanding this mechanics before the loss — not after — makes the difference between a reimbursement and an expense of several thousand dollars at your expense.
The three types of cover behind the word “infiltration”
The term “infiltration” actually includes very different situations for insurers. The first is surface water overflow flooding, usually related to flooding or heavy rainfall. The second is sewer backup, which is wastewater that flows up through interior drains. The third is foundation infiltration, which is water from the ground that enters through a crack or failing drain. Each falls under a separate endorsement, and it is very common for two of the three to be missing from a base policy.
Comparison of typical coverages in Quebec
| Type of claim | Included as standard | Endorsement required |
|---|---|---|
| Sewer | Rarely | Specific endorsement |
| Surface flood / flood | No | Flood endorsement |
| Foundation | No | Rare endorsement, often excluded |
| Sudden Damage (Broken Pipe) | Yes | Basic Included |
Exclusions you should be aware of
Three exclusions recur in almost all policies and create the majority of claim denials. First, “lack of maintenance”: if the insurer demonstrates that the crack was visible for a long time and that nothing was done, the event is not considered sudden. Second, “known peril”: if a previous undeclared infiltration exists, the policy may be void for this cause. Third, normal wear and tear: a 40-year-old French drain that eventually gives way is not an insurable event but an end of useful life.
Post-disaster procedures, in the right order
The order of actions after an undercover directly influences the success of the claim. The recommended sequence: take abundant photographs before moving anything, keep the damaged property (the insurer may want to inspect it), notify the insurer within 24 to 48 hours even if you don’t know the extent, call a professional to identify the cause in writing, and only then start cleaning and repairs. Skipping a step, especially prompt notification to the insurer, is the first reason for refusal for procedural defects.
What prevention changes for the premium
Many Quebec insurers offer discounts or more flexible conditions if the home is equipped with a non-return valve, a sump pump with battery backup, or exterior waterproofing of the foundation. Investing $1,500 to $4,000 in prevention before the loss is often less expensive than paying the increased deductible and premium that follows a claim. A documented foundation inspection also serves as proof of diligent maintenance in the event of a dispute.
Frequently asked questions about undercover insurance
Does a single claim really increase the premium?
Often yes, especially for water claims, which are the most expensive for insurers. An increase of 10 to 30% over three to five years is common after an accepted claim.
Do I have to declare a small infiltration that I have repaired myself?
Not in the moment, but at the time of the annual renewal, yes. Omitting a material fact can be held against you in the event of a future claim, even if it is not related.
Does the flood endorsement cover crack infiltration?
No, in most cases. The flood endorsement covers surface water that enters through openings (garage door, basement window), not water that passes through concrete.
What to do if the insurer denies the claim?
Request the refusal in writing with a specific reason, have the origin of the loss independently assessed, and if necessary call on the Insurance Bureau of Canada or the AMF for mediation. Refusals for unclear reasons are sometimes reversed in a second analysis.
Need a Crack Repair Expert?
A confirmed infiltration requires a written diagnosis, both for the repair and for the claim. Ask for a free quote that includes a report that complies with what Quebec insurers require.