Lead Flashing Costs UK — What to Charge to Replace Roof & Chimney Flashing in 2026

Typical Lead Flashing Prices UK 2026

Lead flashing rarely fits a single fixed price because access, length and complexity vary so much from job to job. The figures below are realistic 2026 ranges for the most common leadwork tasks, assuming a competent roofer or leadworker and standard domestic access. Larger or bespoke leadwork — bay roofs, complex dormers, ornamental work — sits above these ranges.

• Replace lead flashing around a single chimney: £200–£600 (depending on access and scaffold)
• Step-and-cover flashing to an abutment, supplied & fitted: £25–£60 per metre
• Full chimney re-lead (front apron, side step flashings, back gutter): £400–£900+
• Valley lead replacement: £40–£90 per metre (typical valley £350–£800)
• Dormer cheek and roof leadwork: £500–£1,500 depending on size
• Bay roof re-lead (small flat bay): £900–£2,500+
• Leadworker / roofer day rate: £250–£400 per day

The single biggest variable in nearly every leadwork quote is access. A chimney flashing you can reach from a tower or a roof ladder is a different price to one that needs a full scaffold lift around a two-storey property. Always price the access first.

Lead Codes Explained — Code 4, 5, 6, 7 and 8

Lead sheet is graded by code, which corresponds to thickness and weight. The higher the code, the thicker and heavier the lead — and because lead is sold by weight, the higher the code, the more the material costs. Using the right code for the application matters both for durability and for warranty: under-specifying causes premature cracking, while over-specifying wastes money. The codes are colour-coded by the Lead Sheet Association for site identification.

• Code 3 (1.32mm, blue) — soakers and light flashings only.
• Code 4 (1.80mm, green) — the workhorse for most domestic flashings: step flashings, cover flashings, lighter aprons and soakers.
• Code 5 (2.24mm, red) — heavier flashings, valleys, larger aprons, back gutters and exposed work where Code 4 would be marginal.
• Code 6 (2.65mm, black) — valleys, dormers, parapet gutters, box gutters and chimney work that takes traffic or weather.
• Code 7/8 (3.15mm / 3.55mm, white / orange) — heavy-duty bespoke work, larger flat areas, bay roofs and where longevity is paramount.

As a rule of thumb: soakers and light step flashings are Code 4, chimney and abutment flashings are Code 4 to 5, valleys and dormers are Code 5 to 6, and larger flat leadwork is Code 6 and up. Because the lead commodity price moves with the metals market, your material cost can shift between quoting and buying — more on that below.

What Drives the Price of Leadwork

Two flashing jobs of the same length can differ by hundreds of pounds. These are the factors that move the number, roughly in order of impact:

• Access and scaffold: Often the biggest single cost. A tower or roof ladder is cheap; a full scaffold lift around a chimney on a two-storey detached can cost more than the leadwork itself.
• Height and position: A front-slope chimney reached from a flat dormer is quick; a tall stack on a steep rear pitch is slow and needs more protection.
• Length and number of runs: Step flashings priced per metre scale with the run; more chimney faces means more aprons, steps and a back gutter.
• Removing old lead and mortar: Stripping cracked lead, raking out old mortar joints and chasing fresh chases into brick or stone is labour that customers rarely picture.
• Lead code and quantity: Heavier code and larger areas mean more material weight, and material is priced by the kilo.
• Lead welding vs bossing/dressing: Lead welded (burned) corners and box gutters are skilled, slower work than bossed and dressed pieces; ornamental or welded detailing adds time.
• Re-pointing and finishing: Re-pointing the chase, sealing the top edge and applying patination oil to prevent staining all add to the finished job.
• Repair vs full replacement: A patch repair to a cracked apron is a fraction of a full re-lead — but be honest about whether a repair will actually last.

Good-Practice Leadwork — Why It Matters to Your Price

The Lead Sheet Association (now part of the Lead Sheet Training Academy) publishes the recognised guidance for lead detailing, and following it is what separates leadwork that lasts 60 years from leadwork that cracks in five. The most common failure is thermal fatigue: lead expands and contracts with temperature, and if a piece is too long or fixed too rigidly, it cracks along the stress line.

• Correct lead code for the exposure and span — under-specifying invites cracking.
• Sensible piece lengths — flashings and valleys should be lapped, not run in over-long single pieces, so the metal can move.
• Expansion joints and welted laps on longer runs, with the recommended lap at each joint.
• Correct clip and fixing spacing so the lead is held but free to move.
• Patination oil applied to new lead to prevent the white carbonate staining that washes down onto tiles and render.

Poor leadwork is one of the most common causes of roof leaks, and it's usually a workmanship issue rather than a material one. Pricing in the time to do it to standard — proper laps, correct code, neat chasing and pointing — is what lets you offer a meaningful guarantee and defend your price against a cheaper bodge.

Quick Reference: Lead Flashing Prices UK 2026

Access and Scaffold Costs

Safe access is non-negotiable under the Working at Height Regulations 2005, and for most chimney and abutment leadwork on a two-storey property you need more than a ladder. The right access depends on the height, the pitch and how long you'll be up there.

• Tower hire (DIY-assembled, low-level abutment): £60–£150 per week
• Scaffold tower erected to chimney height: £300–£700
• Full scaffold lift around a 2-storey chimney: £600–£1,500
• Cherry picker / MEWP hire (half-day, awkward access): £300–£600

Quote access as a separate line. It's a third-party cost the customer understands, and itemising it stops you being undercut by someone who plans to ladder the job unsafely. On a chimney that needs a proper lift, the scaffold can easily be the largest figure on the quote — never absorb it into a round number and hope.

Worked Example: Full Chimney Re-Lead With Scaffold

Take a typical job: a single brick chimney stack on the rear pitch of a two-storey semi, where the existing lead is cracked, the cement fillets are crumbling and there's evidence of damp in the bedroom below. The customer wants it doing properly with a guarantee. Here's how the numbers stack up.

• Scaffold lift to chimney (3-week hire): £750
• Strip old lead, rake out fillets, dispose: £120 labour
• Front apron, two side step flashings, back gutter — Code 5 lead, ~12kg: £140 material
• Fit, dress, weld back gutter, chase & re-point, patination oil: 1.5 days labour at £320 = £480
• Sundries (clips, lead sealant, mortar, fixings): £40

That totals around £1,530 before margin and VAT. Strip out the scaffold and the leadwork itself is roughly £780 — which is why the same chimney quoted with easy access from a flat-roof extension might land at £450–£600. The lesson is consistent: the access decides which end of the range you're in, so price it first and price it honestly.

Repair vs Full Replacement

Not every leak needs a full re-lead. A single cracked apron can sometimes be patched, a slipped step flashing re-dressed, or a failed cement fillet replaced with a proper lead flashing and sealant. Repairs typically run £120–£350 depending on access. But be straight with the customer: if the lead is fatigued in one place it's often near the end of its life everywhere, and a cheap patch that fails next winter damages your reputation more than a fair full price.

Cement fillets are a particular trap. Many older chimneys were finished with a mortar fillet instead of lead, and these crack and shrink within a few years. Replacing a cement fillet with a proper lead flashing is a genuine upgrade you can explain and charge for, rather than re-doing a detail you know will fail again.

The Lead Price Problem

Lead is a traded commodity, and the metal price moves with the market. Because flashings are sold and costed by weight, a swing in the lead price between quoting and buying can quietly erode your margin on a job booked weeks in advance. On a small flashing the exposure is minor; on a bay roof or a run of valleys using heavy Code 6 or 7, the material weight is significant and the price risk is real.

Protect yourself by buying lead close to the job date, keeping quotes valid for a limited window (14–30 days is common), and stating that material prices are subject to confirmation at the metals price on the day of purchase for larger leadwork. For substantial jobs, take a material deposit so the lead can be bought and locked in early.

Quoting Tips — What to Check Before You Price

Leadwork quotes go wrong when the roofer prices off the customer's description rather than a proper look at the junction. Before you commit a price, check the following:

• Access first: Decide tower, scaffold or MEWP and get the cost before anything else — it usually dominates the quote.
• Measure the runs: Total the linear metres of step, cover and apron flashing, plus any valley or back-gutter lengths, so per-metre pricing is grounded in reality.
• Number of chimney faces: A stack against the ridge needs different detailing to a free-standing one with a back gutter — count the faces.
• Substrate condition: Soft mortar, spalled brick or loose pointing means extra chasing and re-pointing time, sometimes brickwork repair.
• Lead code required: Specify the code on the quote so there's no dispute later, and so the material cost is defensible.
• Welding vs dressing: Flag any welded back gutters, box gutters or detailed corners — they take longer than bossed work.
• Lead price on the day: Note that material is subject to the metals price for larger leadwork.

Including a brief survey note with your quote — junction type, lengths, code specified, access method and substrate condition — lifts your quote above a competitor who just sends a number. It shows the customer you understand leadwork and gives you a clear record if the scope changes.