How do I replace my fascia boards?
Mimic the construction. Whether they used nails or screws, just copy the attachment process using wider nails or screws. Sealant and flashing, all inclusive. The wheel is already made. Why try to re-invent it?
Please, always wear safety glasses and protective gloves. Don't know how you're going up there, but whatever you're on should be tall enough, tied up, down, and around.
The ladder, if possible, secured from shifting you down to the ground.
For every 4-feet up, your ladder should be a foot out. Use standard safety procedure. If you don't know ... hit the internet...Learn what this entails.
Mimic what's there. All construction has more than a design .....each structure has a functional purpose for they way it's put together. Please, don't try to re-invent the wheel. This is especially so with older homes.