Fence staining and sealing
A wood fence weathers the same way a deck does, but it's easy to overlook since it's not somewhere anyone stands. Privacy fences and picket fences both benefit from the same restaining schedule as a deck — sooner if the fence line gets more direct sun on one side than the other, which is common and can make one side of a fence age noticeably faster than the other.
Many homeowners have their fence stained at the same time as their deck so the two match, but it's just as common to stain a fence on its own, especially older fences that have never been treated.