Roger looks at a persistent leak around a parapet party wall, where the obvious repair, repointing, storm treatment and new lead flashing, may not have solved the real problem.
The issue appears to be wind-blown rain getting under the lead where the flashing meets plain tiles, with no visible lead soakers or secret gutter to safely carry the water away.
Roger explains why lead should not simply be stuck down, why movement matters, and why hidden soakers or a secret parapet gutter may be the proper fix.
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🔑 Key Insights
• A parapet party wall was originally used to help slow the spread of fire between neighbouring houses.
• Persistent leaks at the edge of a parapet wall can be caused by wind-blown rain, even when the wall has been repointed and the flashing looks neat.
• Plain tiles and slate-style roofs often need lead soakers or a secret gutter beneath the visible flashing.
• Lead expands and contracts, so sticking it down with mastic is usually the wrong approach.
• Long runs of lead need joints to avoid buckling and cracking.
• A properly detailed hidden channel can carry water safely down to the gutter before it reaches the roof structure.
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#Roofing #LeadFlashing #SkillBuilder
