Updated 25 September 2026
Chimney lead flashing cost UK 2026
The going rate for chimney lead flashing in 2026 is £400–£950 (supply & fit, ex scaffold). Below: a calculator, what the job involves, materials at three price levels, and the prep that changes the price.
Market band£400–£950
Worked example, 1 stack£1,199
Time on site1 days
Chimney lead flashing calculator
Price a real job freeUses your rates, your speed and your receipts.
Market band source: Best Builders.
What the job involves
| Stage | Task | Typical time |
|---|---|---|
| lead | Strip old lead and fillets | 1.5 h |
| lead | Dress apron, steps, soakers and back gutter | 5.5 h |
Materials at three price levels
| Material | Budget | Trade choice | Premium |
|---|---|---|---|
| Lead for one stack (code 4 apron and steps, code 5 back gutter) per stack | £200 Code 4 throughout, code 5 back gutter — Correct codes at the lowest weight | £260 Code 4/5 with lead clips and sealant — Clipped against wind lift | £320 Code 5 throughout — Heavier, longest life |
Trade prices ex VAT, estimates checked 2026-09-25. Log your receipts in Grafto and your own prices replace these.
What changes the price
- Stack size? small (1–2 pots) · large (3+ pots)
Prep to look for
| Condition | Check | Effect |
|---|---|---|
| Cement fillet or missing lead | cement fillets at walls or chimney, cracked or missing lead | Replace cement fillets with code 4 lead flashing |
| Chimney defects | open joints, leaning stack, plants growing, cracked flaunching | Chimney needs work: offer repoint or rebuild options |
Questions
How much does chimney lead flashing cost in the UK in 2026?
The researched market band is £400–£950 (supply & fit, ex scaffold), from Best Builders. A worked example of 1 stack comes to about £1,122–£1,275 across budget, trade and premium materials.
How long does chimney lead flashing take?
The worked example of 1 stack takes about 1 working days.
What changes the price of chimney lead flashing?
Mainly size and access, plus any prep found on site: cement fillet or missing lead, chimney defects.