The best way to prevent such damage is to install drip flashing at the edges of your roof. This consists of L-shaped sheet-metal strips that extend beneath the roofing material and lap over the edge of the eaves. Drip flashing promotes roof drainage without allowing the wood members to beco...
Google “drip-edge vent” and I think CertainTeed – I know CertainTeed makes it. I’m sure others do, as well. And it’s a really effective, little vent. Now, you may have to do some modifications of your roof shingles at the overhang...