Lead flashing is one of the most important — and most overlooked — parts of a roof. Here is what it does and why it matters.
What it is
Lead flashing is the strip of lead used to seal the joins where a roof meets something else — a chimney, a wall, a valley, or around a roof window. It channels water away from these vulnerable points.
Why it fails
- Age and thermal movement — lead expands and contracts, and over decades can crack or lift.
- Poor installation — oversized pieces or bad detailing fail early.
- Failed pointing where the lead is tucked into the wall.
Signs of a problem
Leaks and damp near a chimney or where a roof meets a wall are classic signs. Good leadwork is a skilled job — done properly it lasts for decades and keeps these weak points watertight.
Leak where the roof meets a wall or chimney? Call 01236 338876 for a free, no-obligation survey and a clear fixed price, or see our leadwork service.