The short answer
Usually the lead, the nails and the ridge. On houses from the railway and brickworks years, the tiles and slates seldom give up before everything around them. Flashings split, fixings rust and mortar crumbles, and mending those parts costs a fraction of a replacement. Checking the slopes from a ladder, then the underside from the loft, shows which route fits your house.
When the branch line opened in 1882, Hermitage was a young village, and a good number of its houses date from the decades that followed. They share a recognisable set of ailments.
Q1.1Why does lead fail on a chimney?
Lead is soft and tough, but it moves with every change in temperature. Over decades it work-hardens and cracks, particularly where it is pinned at a chimney or tucked into a wall. The mortar holding the top edge into the brickwork also crumbles, so water slips behind it. A repair that replaces only the visible strip often fails again, so we strip back to sound brick, re-fix and re-dress the lead properly. Our chimney repairs page explains the full job.
Q1.2Can slipped slates be put right without re-roofing the villa?
Usually, yes. A slate slips because its iron nail has rusted away, not because the slate itself has failed, so the cure is a fresh fixing or a clip, with the odd cracked slate replaced. Where slates are flaking away over an entire slope, or the battens beneath have gone soft, the roof is spent and better re-covered. Photographs from the survey separate the two cases, so nobody pays for a replacement where a repair would do. Small jobs, like a handful of slates and a new lead tray at a bay, are often finished in a single visit.
Sound original slate is reused on the same slope. When replacements are needed, we match them by size, tone and thickness and spread them across the slope, so the mend is hard to spot from the road. Ask us to explain any part of the survey you want to understand better; the photographs are there to be used.
A written quote comes after the survey, alongside pictures of your own roof.