Good day all, the roof on our 1993 manufactured home is pretty wavy and some spot are very springy/spongy. I know the roof leaked in a few spots and will have some water damage that will need to be replaced. We live in the Pacific northwest.
As a whole, Would I be ok re-sheeting the roof with 5/8 plywood over the original 1/2 (could be 5/8 osb?
Or would anyone recommend taking out the original osb?
I am mainly concerned about weight. I’ll be replacing the shingles with standing seam metal roofing which i believe is way lighter than shingles.