Lead flashings are a small detail with a big job. They protect your home from water ingress, safeguarding the building fabric and helping you avoid costly repairs. Knowing what they do, who maintains them, and when the Party Wall etc. Act 1996 applies will keep your property secure and compliant.
What Are Lead Flashings?
Lead flashings are slim sheets (circa 4-5mm) of lead fitted at vulnerable roof junctions to create a durable, watertight seal, including:
- Where a roof meets a wall
- Around chimneys and roof valleys
- Between dormer windows and the roof surface
Without effective flashing, properties are exposed to damp, mould, and potential structural deterioration.
Maintenance Responsibilities
Homeowners are usually responsible for maintaining lead flashings. Where flashing sits on a shared boundary or party wall, responsibility may be shared with the adjoining owner. Regular inspections—and prompt repair of cracks, lifting, or corrosion—help prevent water damage and expensive remedial works.
How the Party Wall Act Applies
Section 2 of the Party Wall etc. Act 1996 may require you to serve formal notice on your neighbour if flashing works involve:
- Cutting into a party wall, or
- Making the party wall weatherproof.
If your project falls into either category, serve a Party Wall Notice at least two months before works begin. Your neighbour can consent, dissent, or request a Party Wall Award. Appointing an experienced party wall surveyor helps ensure compliance and minimise disputes.
Protecting Your Property and Peace of Mind
Lead flashings are a simple, essential defence against water ingress. When works affect a party wall, following the Act protects both your property and your neighbourly relationships.
Need help? Email team@simplesurvey.co.uk for expert guidance on lead flashings and all party wall matters. As the lowest-cost party wall surveyors across England & Wales, Simple Survey delivers professional, compliant support that keeps your project on track.