A relative (really :) got a letter from his home insurance carrier demanding that substantial section (around half) of the roof be reshingled or else coverage would be cancelled.
The last time that part of the roof was shingled was at least 40 years ago, and the contractor said the shingles were "potato chips" -- curling and snapped very easily as they had lost all pliability over the years.
It's a two-unit house with one unit rented and the other lived in.
So would the reshingling be a repair or an improvement? In plain english (which has little to do with taxes :) I could see it either way. On one hand, a roof in bad shape in being fixed. On the other hand, it's being fixed to brand new.
I imagine it counts as an improvement that must be capitalized.
Out of curiosity, would the answer have come out different under the old tangible property rules that were only recently changed?