i cant think why you want to replace it but your gutters will have to be removed,the fascia panel will be held to the existing wood with stainless steel poly top nails,if you prise off one end the work your way across the panel,you would be better with help from a friend if its a full 5m panel.if its buffalo board which replaces the existing wood itll prob have some heaveir fixings and be twice the weight.
ronnie
July 2008