Roofing and venting question
We're getting a new roof put on this old house. Judging by the t.v. antenna , the last layer was put on sometime in the mid-1960s. The house was built in 1916.
Along with the new shingles, we're getting, for the first time in the house's life, vented soffits and a ridge vent. That means our dear old attic can breathe! But here's my question: why is a vented attic considered important these days, but not when the house was built? And I don't mean only our house, but almost all older houses I can think of. They were not built with venting in mind. So what changed?