The client
A household in Wasaga Beach reached maturity on a $245,000 mortgage and arranged a straight switch to a new lender, expecting the usual paperwork and nothing more.
Mortgage balance
$245,000
22 years remaining amortization
Home built
1968
Original aluminum branch wiring
Combined income
$8,600/month
Other debt
$240/mo car loan
The problem
A new lender will not fund a switch without confirmed home insurance in place naming it as loss payee -- and the new lender's required insurer's own file review is exactly where an older home's original wiring can surface as a problem the borrower never knew they had.
What the insurer's review actually found
- ▸The home's original 1968 aluminum branch wiring had never been remediated
- ▸The insurer would not renew the existing policy, or bind a new one, without proof the connections had been corrected
- ▸No amount of shopping for a different insurer changed the underlying wiring -- every mainstream insurer applies some version of the same standard
Nothing about the mortgage itself had changed. The house the mortgage was secured against had simply never had this looked at before.
The numbers
The switch's own arithmetic was ordinary throughout -- unchanged balance, unchanged amortization, a straightforward qualifying payment.
| The straight switch, unchanged balance | Amount |
|---|---|
| Mortgage balance | $245,000 |
| Remaining amortization | 22 years |
| Total debt service | Figure |
|---|---|
| Payment at the qualifying rate (6.75%), 22 years | $1,770/mo |
| Property tax | $320/mo |
| Heat (lender estimate) | $125/mo |
| Car loan | $240/mo |
| Total debt service | 28.5% |
28.5% was never in any doubt, consistent with the modest payment changes Canadian mortgage renewal statistics show for a straight switch at an unchanged balance. The wiring, not the ratios, is what actually held this file.
The solution
A mortgage agent licensed under Ontario's Mortgage Brokerages, Lenders and Administrators Act treated the insurer's remediation requirement as a closing condition to satisfy on a fixed timeline, not a reason to abandon the switch.
First, obtained the insurer's exact remediation requirement in writing -- correcting the aluminum branch circuits' connections with approved copper connectors, confirmed by an Electrical Safety Authority inspection.
Second, engaged a licensed electrical contractor to pigtail the affected circuits, then scheduled the ESA inspection as soon as the work was complete.
Third, supplied the resulting ESA certificate directly to the insurer ahead of the new lender's funding date, rather than waiting for the insurer to ask again.
The outcome
The insurer bound coverage on the strength of the ESA certificate, the switch closed at 4.75%, and total debt service settled at 28.5%.
Because this file is a straight switch at an unchanged balance and amortization, CMHC's ratio maximums do not apply directly; the 28.5% figure is informational, showing the ratios were never the obstacle -- the insurance placement was.
What to take from this file
- 01A new lender will not fund a switch without confirmed insurance in place. An insurer's own file review can surface a property condition the borrower never knew was an issue.
- 02Unremediated aluminum wiring is a common, well-known insurance flag on homes from the mid-to-late 1960s and early 1970s. It will not go away by shopping for a different mainstream insurer.
- 03Get the insurer's exact remediation requirement in writing before booking any electrical work. Different insurers can accept different fixes, and doing the wrong one wastes time on a fixed timeline.
- 04Build the electrical-inspection timeline into the switch's funding date from the moment the flag appears. A licensed electrician and an ESA inspection both take real, bookable time.
Sources
Every regulatory figure in this file traces to one of these primary sources. Client details and anything that varies by lender are illustrative, as flagged below.
- ▸OSFI — Minimum qualifying rate for uninsured mortgages — the minimum qualifying rate — greater of contract rate + 2% or 5.25%.
- ▸Provincial/territorial mortgage-broker legislation fetched directly (bclaws.gov.bc.ca, legisquebec.gouv.qc.ca, fcaa.gov.sk.ca, web2.gov.mb.ca, nslegislature.ca, assembly.nl.ca) plus FCNB's own site for NB and CanLII's index for PE — see notes for per-province method — provincial mortgage regulators and licence titles.
Illustrative in this file — lender-specific, not rules:
- ▸4.75% switch rate — rates move daily; not a quote.
- ▸the insurer's remediation requirement — each insurer sets its own underwriting stance on unremediated aluminum wiring; not every insurer requires the identical fix or documentation.
Authority & provenance
How this case file was built
We publish the origin, the verification method and the reviewer for every case file, so you can judge how far to trust it before you rely on it with a client.
Where it comes from
Derived from files handled by Treadstone’s fulfillment desk and from scenarios contributed by partner brokerages. Names, employers, exact amounts and dates are changed so no client or file is identifiable.
Provenance: Composite — a pattern seen repeatedly on fulfilled files, not a single transaction.
What is verified
Every regulatory figure traces to a primary source listed above and was checked against it on the date shown. The arithmetic is recomputed by machine on every rebuild.
Anything that varies by lender is labelled illustrative rather than stated as a rule.
Who reviewed it
Reviewed for Canadian regulatory accuracy before publication, and re-checked whenever a cited rule changes.
Reviewed by: Nicholas Parson, Treadstone Associates — reviews every case file before publication.
This case file is professional reference material for licensed mortgage professionals. It is not advice to a borrower, and it is not a lender commitment. Insurer rules, qualifying rates and provincial taxes change — confirm the current position with the insurer, regulator or lender before you rely on any figure here in a live file.