It’s a old farm house, parts of the house was build in 1900. The asphalt shingle roof appears to be in good shape. (6-10 years old)
When you look at the roof from the attic. There is an old metal roof and boards, No sheathing? My question is to install shingles over a metal roof wouldn’t you put sheathing on the metal roof then the shingles? Is it better to completely remove the metal roof or is it better to keep it as support???
One of the photos show a hole in the metal roof and it looks like sheathing?
Please see Photos
Thanks for your Help