Leadwork & flashing · A focused guide
What should be considered when lead flashing keeps opening at a joint?
Published by Big Ben Roofing Ltd
A flashing joint that repeatedly opens needs its arrangement and connections assessed, including how the detail accommodates the conditions at that location. The visible opening alone does not establish which material or repair is suitable. Ask the contractor to identify the existing metal and explain whether the layout, retention or adjoining work contributes to the concern. Any proposed renewal should show its boundaries and connections rather than simply covering the same joint again.
Describe a pattern without diagnosing movement
Record whether the opening appears to change over time and whether repairs have been made at the same position. Photographs from different dates can support that account, provided the viewpoint is comparable. A perceived seasonal pattern is useful context but does not prove a cause. Include any nearby building alteration or cracking as a separate observation for the assessor to consider.
Request a detail, not just a material name
A specification should explain the section being renewed and how it meets retained flashing, the wall and the roof covering. Ask why the proposed arrangement suits the findings and whether associated work is required. If another building defect prevents a durable connection, request that limitation in writing. Keep any recommendation for wider investigation separate from the quantity of new flashing being priced.
Useful details to record
- Identify the recurring opening and the dates of earlier repairs.
- Share comparable photographs already taken from a safe position.
- Mention neighbouring cracks or alterations without assuming they are related.
- Ask how the proposed layout addresses the identified junction concern.
Use information already available from indoors or ground level. Do not climb onto the roof or disturb materials to complete this checklist.
Should a recurring flashing joint be sealed rigidly to stop all movement?
Do not select that approach without a suitable detail. Ask the contractor to explain the existing arrangement, likely cause and proposed repair. The specification should suit the assessed material and junction rather than treating every visible opening in the same way.
Background reading
- Lead Sheet Training Academy: rolled lead sheet technical manual
- Lead Sheet Training Academy: flashing and junction details
General guidance helps frame the questions. The cause, suitable materials and scope depend on inspection of the particular roof.
Related questions
Why is roof flashing pulling away from the wall?
Prepare an enquiry about an open flashing-to-wall junction and ask about the material, retention and condition of adjoining masonry.
What if a flashing leak returns after several sealant patches?
Use previous patch history to frame a focused assessment of the material and junction rather than automatically repeating the same surface treatment.
Discuss what you have noticed
Include your postcode, the affected roof section and when the concern appears. The team will review the enquiry and confirm the next step, scope and availability.
Request a roofing assessment