Ezra Brooks said:
What if you don't know how old your rood if....it was old when you bought the house?
This is where your insurance adjuster comes in. In some cases, the insurance carrier knows when the roof was replaced for any number of reasons. However, in a lot of instances, they don't. If that ends up being the case, then the adjuster will make an educated guess on age. It will then be depreciated an appropriate amount.
Depreciation is also based on the particular item. The roof may be 50%, but felt, vents, and every line item may depreciate differently. Either way, if I'm asked for the roof age the answer is always "I don't know" or "5-7 years" or "almost 10 maybe?"
I don't know anyone's policy and I'm not interested in potentially messing up a claim. The adjuster really needs to make the call.