Opinion on past roofing job by previous owner
House is 140 years old and purchased in 2021 (not by me, a family member). Seller disclosure said the roof was 5 years old at time of sale.
There have been leaks and current owner had a roofing company inspect and give a quote. The house is a complicated roofing job because it has multiple sections, including a square tower (roof of the tower section is a pyramid on west side of house, NW quarter has ridge going east-west, east half of house has a ridge going north-south, and there is a one story addition with its own roof. )
The roofing company said the decking of the roof on the original house is boards with gaps and apparently covered with tin sheathing. Tar paper and shingles were put over that. He said under current code the decking would have to be completely replaced.
Would that have been required by code in 2016 when the roof was supposedly redone?