How Insurers Treat an Aging Roof, Water Heater and Wiring

This article is general information, not insurance, legal or financial advice. Practice varies by insurer and province, and your own policy wording governs. Ask a licensed broker about your situation before acting on anything here.

Homeowners treat system age as a maintenance question: when does this thing need replacing. Insurers treat it as an underwriting question, with sharper consequences. Age can decide whether a home is insurable at all, what deductible applies to one peril, and how a component is valued after a loss. So install dates matter.

Why underwriters care about age at all

Not as a penalty. Insurers price risk on expected loss frequency, and the components that age out of service are the ones that generate claims. Water damage has overtaken fire as the leading cause of home insurance payouts in Canada, according to the Insurance Bureau of Canada, and much of it starts with plumbing and appliances rather than weather. A tank that fails is not an act of God; it is a service life ending on a Tuesday.

So the application questions are not idle. One Canadian homeowners form asks you to "list/date any upgrades or maintenance done" for plumbing, heating, roofing and electrical, and whether the plumbing is copper, polybutylene, Kitec, PEX or galvanized iron (Premier Group application).

Three different outcomes, often confused

"They won't cover an old roof" collapses three outcomes into one, and the response to each differs.

Refusal or non-renewal. The insurer declines to write or renew. This usually attaches to a specific feature rather than to age generally.
A surcharge, or a higher deductible on one peril. Coverage continues, but the water or hail deductible sits above the policy's general deductible.
One component moved to actual cash value. The policy stays replacement cost overall while one part of the building settles at depreciated value, and nothing looks different until you claim. We cover that distinction in home insurance basics; what matters here is that it can apply to a single component by endorsement.

That third outcome in published wording: a roof surfacing endorsement available in the Canadian market provides that "the damaged Roof Surfacing shall be valued at the Actual Cash Value at the time any such loss or damage occurs," and separately excludes "Cosmetic Damage to Roof Surfacing caused by the perils of windstorm or hail" (Premier Canada form LCRS, November 2022). A homeowner with that endorsement has coverage, not a new roof after a storm.

The roof

Roof age is the most discussed trigger and the one carrying the most unsourced confidence. You will see a specific threshold quoted as an industry rule. We could not find it stated by any insurer, regulator or the Insurance Bureau of Canada; it appears mainly on roofing company blogs, so treat it as marketing.

What is documented is directional change under hail loss pressure, in one province. A review MNP LLP conducted for the Insurance Bureau of Canada found Alberta hail coverage "remains widely available," but that "insurers reported substantial changes in coverage design, pricing, and risk management practices in response to increasing hail losses and volatility," and that hail-resistant roofing and siding earn preferential treatment including longer depreciation terms and reduced hail deductibles (Insurance Cost Pressures from Hail Damage in Alberta). "Longer depreciation terms" is the tell: schedules keyed to roof age are a live underwriting lever in hail-exposed markets.

InterNACHI's life expectancy chart puts three-tab asphalt shingles at 20 years and architectural asphalt shingles at 30 years, noting the figures assume recommended maintenance and normal wear and are guidelines rather than guarantees. Two roofs installed the same year can be a decade apart in remaining life, so the date and the shingle type both belong in your records. Our roof lifespan article covers telling the two apart.

Wiring

Wiring is where age most often becomes an insurability problem, not a pricing one.

Knob and tube. In Ontario it is permitted by the Electrical Safety Authority where protected by a 15 amp fuse or breaker, no outlets have been added to overload the circuit, and the visible conductors appear sound. Insurance is separate from code. Onlia, a Canadian insurer, summarises the position citing the Insurance Bureau of Canada: some providers will not insure these properties, others allow time for remediation, and others will write it but require an electrical inspection (Onlia on knob and tube wiring).

Aluminum wiring. Square One, another Canadian insurer, publishes its conditions: "Some providers will not insure homes with aluminum wiring. Others are okay with it, provided a licensed electrician has inspected and passed the electrical system." It says it can usually cover a home where the outlets and switches are aluminum rated and a recent inspection found no issues (Square One on aluminum wiring).

60 amp service. Canadian Underwriter reports that "most insurers see homes with knob-and-tube wiring, aluminum wiring, and 60-amp service as high-risk, which prevents clients with those systems from easily obtaining home insurance" (Canadian Underwriter, February 2024). In each case a current licensed electrician's report is the document that moves the file: age raises the question, the inspection answers it.

Plumbing

Polybutylene, known in Canada as Poly-B, is the clearest case of a material whose age alone changes an insurer's answer. Alberta Municipal Affairs notes that Poly-B "is no longer listed in the current plumbing codes, however codes are not retroactive," and that manufacturers stopped producing it in 1998 (Safety Tips: Polybutylene (Poly-B) Pressure Water Piping). Existing installations are not required to be replaced on code grounds alone.

Insurance is separate. Square One states it plainly: "You may find that insurers won't insure you at all, or they'll impose a higher premium or water damage deductible," and adds that a Poly-B water claim can bring a large premium or deductible increase at renewal, or non-renewal (Square One on Poly-B plumbing). All three outcomes above, from one material. Kitec and galvanized iron sit on the same checklist, so ask your broker rather than assuming plumbing is a non-question.

Water heaters

A water heater is cheap to replace and expensive to ignore, because its failure mode is water across a finished floor. InterNACHI puts a conventional tank at 6 to 12 years and an on-demand (tankless) unit at 10 years. That range is real variation: one tank can be finished while a neighbour's identical unit has years left.

The insurance angle is indirect but firm. Gradual damage, wear and tear and deferred upkeep are generally excluded; policies respond to sudden and accidental events. A tank weeping into a drain pan for a year is not a sudden event, and your records are what distinguish the two stories at claim time. Finding a water heater's age from its serial number gets the date when nobody left an invoice.

Oil tanks

If the house heats with oil, the tank gets its own form. An Intact Insurance questionnaire asks the year of installation, whether the tank sits inside, outside or underground, marking the underground option "Risk declined if Underground," and whether it is inspected and serviced annually by a licensed contractor (Intact Oil Tank Questionnaire, form 80160). Another asks the age and where to find it: "check tank for sticker or stamp with date" (Premier Group fuel oil tank questionnaire).

What proof insurers accept, and why the date matters

The documents that settle these questions are ordinary: the installer's invoice showing date and equipment, a building or electrical permit, a contractor's inspection report, and a photo of the data plate.

Keeping them is not tidiness. In Ontario, the statutory conditions in every property policy provide that misdescribing the property in a way "material to be made known to the insurer in order to enable it to judge of the risk" voids the contract as to that property, and that any change "material to the risk and within the control and knowledge of the insured" avoids the contract as to the part affected unless it "is promptly notified in writing to the insurer" (Insurance Act, R.S.O. 1990, c. I.8, s. 148).

That cuts both ways. Guessing at your roof's age on an application is a risk, and an upgrade the insurer never hears about does nothing for your file.

Before your next renewal

Write down the install year for the roof, furnace, water heater, panel and any oil tank, with the source of each date beside it.
Report completed upgrades with the invoice or permit, so they count toward your rating, and ask your broker which ones the insurer wants to be notified of.
Ask which settlement basis applies to your roof, whether an endorsement limits it, and what the deductible is per peril rather than policy-wide.
Get the inspection where a feature is the obstacle, and start early: if non-renewal is possible you want weeks to shop, not days.

Run those dates against the published service lives with the home system lifespan calculator, and keep them with the rest of your home documents.

Frequently asked questions

Will my insurer drop me because my roof is old? Possibly, but more often the outcome is a surcharge, a higher hail deductible, or actual cash value settlement on the roof. Ask which applies; they look identical until you claim.

Is there an age at which insurers stop covering roofs? No industry-wide threshold is published by insurers, regulators or the Insurance Bureau of Canada. Insurers set their own rules, so ask yours.

Can I get insurance with knob and tube or aluminum wiring? Often yes, usually conditional on a licensed electrician's inspection. Some insurers decline outright and others allow time to remediate, so it is a shopping question as much as a repair one.

What if I have no idea when something was installed? Most equipment carries a date code on its data plate, and oil tanks often carry a dated sticker. Photograph it and record the year.

Each of these is answerable in a minute when the install dates and invoices live in one place, and takes an afternoon of guessing when they do not. See how Habyn helps homeowners.