Because of their constant exposure to the elements, it is important to look for signs of damage frequently. Blocked gutters can increase the amount of rainwater in contact with them, and in this case they may degrade faster. It is common for birds and squirrels to nest behind soffits, and can cause damage trying to make their way in. Facia boards that have been overexposed to rainwater may also start to come away from the property. Replacement is essential if you see any signs of damage or rot.