If your roofers are replacing your fascia board as part of a full roof replacement, then they will install the new shingles before they address the fascia. There is no way to replace the fascia board without removing the gutters, as the gutters are mounted to the board.
Do roofers replace fascia boards?
Most roofers, in that case, are generally trained to spot problems in fascia and gutters as well the training required to take care of them. ... Fascia both keeps the gutters secure and seals the interior of the attic to some degree. Every so often in the lifespan of your home, you will see fascia repair or replacement.
Do roofers do fascias and soffits?
Roofers don't only lay roof tiles, there are many jobs that a skilled roofer or a carpenter can do. These include replacing fascias, soffits and guttering.