Roof leadwork & lead flashing repairs
Lead is used at some of the most vulnerable roof junctions: chimneys, valleys, walls, parapets, gutters and dormers. Good leadwork is not simply sheet metal folded over a gap; it is designed around water flow, cover, sheet size, fixings and thermal movement.
What kind of leadwork are you looking at?
Each roof junction uses lead differently. Select an area to see the basic weathering role.
Four separate details may protect one chimney
The Lead Sheet Training Academy describes chimney weathering as a combination of front, side and rear details rather than a single flashing.
Front apron
Weathering at the downslope face of the chimney.
Soakers
Individual pieces integrated with courses of tile or slate at the sides.
Step / cover flashing
Protects the upper edge of side weathering where the roof meets masonry.
Back gutter
Collects and diverts water arriving on the upslope side of the chimney.
Splits & fatigue
Thermal movement can fatigue lead if sheet sizing, fixing or detailing restricts the movement it needs.
Short cover / poor chase
Wind-driven rain can exploit flashings that do not provide enough cover or are poorly secured into masonry.
Support & falls
Valleys and gutters need appropriate support and drainage; standing water increases the demand on every joint.
Flashings, soakers, valleys and chimneys
Lead is a specialist roofing material. The correct detail depends on roof covering, pitch and geometry.
What is the difference between flashing and a soaker?
A soaker is an individual weathering piece fitted with each course of tiles or slates at an abutment, while cover or stepped flashings protect the top of that junction. Different coverings use different details.
Why does lead flashing split?
Lead moves with temperature. Incorrect sheet sizing, inadequate laps, poor fixing or restriction of movement can contribute to fatigue and splitting.
Can lead flashing be sealed instead of replaced?
Sealant can sometimes have a limited maintenance role, but it should not be used to disguise a failed lead detail that needs proper renewal.
What leadwork does a chimney need?
A chimney on a roof slope typically involves a front apron, side flashings/soakers and a back gutter or saddle arrangement depending on position and covering.
Do lead valleys always need full replacement?
No. Local defects can sometimes be repaired, but widespread splits, poor sizing, corrosion or failed support may justify complete renewal.
Continue your roofing research
These related pages connect this topic to the wider roof system and the next practical decision.
Firewalls & parapets →
Continue into the specialist Bespoke Roofing page for more detail.
Chimney repairs →
Continue into the specialist Bespoke Roofing page for more detail.
Roof valleys →
Continue into the specialist Bespoke Roofing page for more detail.
Photograph the whole junction, not only the split
A wide view helps us understand where water arrives and where the lead interfaces with tiles, slate, walls or chimneys.