Two semi detached Edwardian villas in Liverpool turned in to flats decades ago. Pictures are of roof at my house with wooden capping board sitting along edge of slates. This is a design common to houses of this region and period. Second picture shows neighbours roof after replacement of wooden fascias, barge boards, etc for plastic. Capping boards have not been replaced and existing slates seperated so that they sat flush on the edge. Is this the workmanship of cowboy builders and what could be the consequences of leaving it like this? I'm worried because our Freeholder is intent on having the same work done to our property.