Start with the vocabulary, because the vocabulary is the whole argument. The Financial Consumer Agency of Canada draws the line plainly: actual cash value coverage gives you the cost of an item when it was new, minus depreciation, where depreciation is the loss of value due to age and condition. Replacement value coverage gives you the actual cost to replace the item. On a fifteen-year-old roof, a decade-old furnace, or a kitchen full of appliances bought across twenty years, the gap between those two numbers is not a rounding error. It is often the difference between a house and a down payment.
Liam Corcoran, a lawyer and adjuster with Pythe Navis MDP, put the practical outcome bluntly to CBC News: "You're going to get what's called actual cash value ... you're not going to get the cost to fully buy, rebuild a brand new home unless you actually rebuild a brand new home." Most policies, he noted, insure on an "all risks" basis that covers wildfire. Coverage was never the question. The settlement basis is.
Partial losses follow their own arithmetic, and homes that survive with smoke, soot, and retardant damage enter a different negotiation than homes reduced to a foundation — a distinction worth understanding before an adjuster arrives, as our reporting on what standard policies cover for wildfire smoke damage sets out.