Lead flashing is one of the most important, and most commonly overlooked, parts of a roof. It sits at every junction where water could otherwise find a way in — around chimneys, valleys, and roof-to-wall abutments. When it fails, it's rarely sudden. Here's what Back to Back Roofing Worcester looks for, and why catching it early makes a real difference.
Why Flashing Is So Important
Flashing seals the vulnerable junctions on a roof that tiles alone can't cover properly. Chimneys, valleys, and the point where a roof meets a wall all rely on correctly fitted lead to stay watertight, which is why flashing failure is one of the most common sources of roof leaks.
Common Causes of Flashing Failure
- Thermal movement over years causing joints to crack or split
- Age and general wear, since lead does have a finite (if long) working life
- Poor original installation, particularly inadequate overlap or fixing
- Physical damage from debris, storms, or previous roof work
- Corrosion in cases of poor-quality or incompatible materials
Early Signs Worth Watching For
- Visible cracks or splits in the lead, particularly at joints
- Lead that's noticeably lifted or pulling away from a wall or chimney
- Green staining running down brickwork below the flashing, a sign of copper or lead runoff
- Damp patches inside near a chimney breast or roof-to-wall junction
- Flashing that looks discoloured or patchy compared to the rest
Why Catching It Early Matters
- A small crack is a small repair. Caught early, most flashing issues are a contained, straightforward fix.
- Left untreated, water tracks further. It can affect timber, insulation and internal finishes before it's ever obviously visible.
- Delayed repairs cost more. Once water damage has spread, the repair scope grows well beyond the original flashing issue.
- Regular checks help. Especially after storms, when flashing damage is more likely.
Benefits of Addressing It Promptly
- Keeps repairs simple and affordable
- Prevents hidden damage to timber and internal finishes
- Protects the vulnerable junctions most likely to leak
- Extends the working life of the surrounding roof
Noticed cracked or lifting flashing? It's worth getting checked before it lets water in.
View Leadwork Services →Why Choose Back to Back Roofing Worcester
We're a domestic and commercial roofing team based right here in Worcester, on Rose Avenue in WR4, so we know the area and can get to you quickly. Every job comes with clear pricing before work starts and workmanship you can rely on.