Tens of thousands of homes across the UK are fitted with concrete gutters that were first installed between 1950 and the 1970s. Some of the concrete gutters are nearing 70 years old! Over this time, they will have been affected by the environment.
Unless you have been performing some gutter repairs periodically during this time, then the concrete gutters will have sustained some damages. This will cause the gutters to leak and even cause damp on the interior walls.