Leadwork & flashing · A focused guide
Does a leaking lead valley need clearance or lining repair?
Published by Big Ben Roofing Ltd
Debris and damaged lining are different possible concerns, and a visible accumulation does not establish the complete cause of a valley leak. Ask whether the water channel, lining, adjoining covering and lower discharge can be assessed together. Clearance may be one part of the work, but any confirmed split or defective junction needs its own repair decision. The quotation should distinguish cleaning access from investigation and permanent lining work.
Keep observations separate
From a safe viewpoint, describe leaves, displaced tiles and internal staining individually. Identify whether water appears near the upper, middle or lower part of the valley. Do not enter the channel or attempt to clear it yourself. Where earlier photographs show the valley before debris accumulated, share them as context while recognising that concealed conditions may have changed since those images were taken.
Explain what will be exposed
If assessment requires lifting adjoining covering, ask how much needs to move and how it will be reinstated. A lining repair should identify the affected length and connections to retained material. If renewal is recommended, establish whether supporting work and the discharge into guttering are included. Agree how the contractor will show any additional defects uncovered after clearance or opening-up.
Useful details to record
- Describe visible debris and suspected lining damage as separate concerns.
- Locate the valley and the internal area affected by water.
- Ask whether adjoining covering must be lifted for proper assessment.
- Confirm the clearance, lining and lower-discharge boundaries in the proposal.
Use information already available from indoors or ground level. Do not climb onto the roof or disturb materials to complete this checklist.
Does clearing a valley confirm that its lining is watertight?
No. Clearance removes an obstruction but does not automatically establish the condition of every seam, connection or concealed part. Ask what inspection accompanies the clearance and whether any further investigation or defined repair is recommended afterwards.
Background reading
General guidance helps frame the questions. The cause, suitable materials and scope depend on inspection of the particular roof.
Related questions
Why should broken slates beside a roof valley be assessed together?
Understand the repair questions where cut slates meet a valley, including covering support, the lining and the adjoining water route.
Why do small cut tiles beside a valley need a specific repair scope?
Discuss damaged or displaced cut tiles beside a roof valley, including their fit, fixing and the connected valley drainage detail.
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