Why damaged fascia should be replaced before getting a new roof
A new roof can easily last 30 or more years, depending on the roof covering or the grade of shingles used, so it makes sense to have a sound substrate under the roof. Any competent roofing contractor will repair damage to the roof deck (usually plywood or OSB sheathing) prior to installing a new roof.
The best roofing contractors will also inspect the structure for damaged fascia boards. Depending on the extent of the damage, a roofing contractor may make the repairs themselves or call in a company that specializes in home repairs.