Isolate the air moving through the soffit vents into the attic by fabricating a chimney from cardboard at the soffit in each rafter bay. On the bottom edge of each rafter nail or staple an 18-inch ...

But that’s normal with soffits — the underbelly of the roof overhang. The usual suspects: no sunlight, little air circulation, mold growth and leaks from the roof edge and gutter, ...