Finlock gutters are commonly found in houses built between 1950 and 1970. The concrete units span the cavity and also provide a gutter profile. In some cases, they are formed into a lintel over the windows by inserting steel bars into the lintel trough and filling it with concrete.

Over time the Finlock concrete blocks become porous and the joints start leaking, the staining of the exterior walls and dampness inside the property are very common symptoms. As a solution, the gutters were lined using aluminium foil and hot bitumastic, but this method proved to be a short-term measure.

Here at Cotswold Rainwater Services, we have been specialising in the installation of aluminium liners to the Finlock concrete gutters for more than 40 years.

For the DIY enthusiast or any self-build project, we can provide a ‘Run-Out’ service for the aluminium liners and offer technical expertise to help you with your installation.