I have to replace all the old 2x12" facia boards that also form the outer side of the custom wooden gutters around the house. This would be relatively easy however there is a black rubber gutter lining that is glued to the inner side of the board, so to remove the facias I’d have to carefully peel the rubber off which seems almost impossible without causing damage. The rubber is still in good condition but is approx 20 years old so I thought at looking at replacing it at the same time. It looks to be around 1/8" in thickness or a little less but I have no idea what it is or where to get it from. Would appreciate some suggestions.
Also what glue would have been used to adhere it to the wooden surfaces of the guttering.