The short answer
Most need their ridges and verges looked at, their felt checked and their eaves timber inspected. A roof from the 1950s is typically seventy years old, so the tiles may be fine while the parts beneath and around them are tired. The survey photographs show which.
When the first houses on the Walcot East estate went up, roofs were built quickly and to a pattern. That is good news for repairs, because a fault we have seen on one house tells us where to look on the next. It also means the same weaknesses are showing up all along a street at about the same time.
Q1.1What state is the 1950s felt in?
Under the tiles is the underlay, and in the 1950s that was bitumen felt. Felt dries, cracks and tears with age, especially around the ridge and at the eaves. Torn felt does little while the tiles are all in place, but when a tile slips or cracks, water reaches the battens and rafters. We lift tiles at the eaves, the ridge and a plain area to see what is there.
Q1.2Why do the ridges and verges work loose?
Ridge tiles cap the line where two slopes meet at the top, and verge tiles finish the roof along a gable wall. Both were traditionally bedded in mortar, and in the 1950s nobody thought to do anything more. That mortar cracks over decades, and a loose ridge tile is one of the first faults we look for. A repair that adds clips or a dry ridge system holds in a way that fresh mortar alone does not, so the same ridge is not back on the list two winters later. Between the ridge and the verge sit the top courses of tiles, which take the worst of the wind and are worth checking while the scaffold or ladders are in place.
Q1.3What about the fascias, soffits and gutters?
At the eaves, the fascia is the board the gutter fixes to and the soffit is the underside panel. Timber fascias can rot where the gutter has overflowed for years, and the roof then loses its edge support. Sometimes the soffit board of this era contains asbestos, which the next answer covers. Gutters matter here as well: brackets spaced too widely let a gutter sag, and a sagging run holds water against the fascia. Renewing the lot as one job is often tidier than patching it a section at a time.
Our ridge, verge and dry-fix page shows how a mechanical ridge repair is made.