Lead Flashing Eastbourne

A standard chimney flashing replacement in Eastbourne costs £350–£700 for a single stack, depending on height and the amount of lead required. Step and cover flashing on a dormer or side extension runs £250–£600. Valley replacement in lead is £400–£900. We always specify code 4 or code 5 lead on coastal Eastbourne properties — heavier gauge withstands salt-air oxidation far better than code 3.

Salt air is the primary cause. Sodium chloride carried inland from the seafront attacks lead at a molecular level, causing it to oxidise and become brittle faster than inland conditions. Properties within half a mile of the seafront — Meads, the western seafront, Sovereign Harbour — see the worst deterioration. A lead flashing that lasts 30–40 years inland may need replacing after 15–20 years in coastal Eastbourne.

The code refers to the weight and thickness of the lead sheet. Code 3 (1.32mm) is the minimum for flashings but not recommended for coastal use. Code 4 (1.80mm) is our standard specification for Eastbourne properties. Code 5 (2.24mm) is used on exposed seafront properties and high-salt-air locations. Heavier code lead resists coastal oxidation significantly longer.

Yes, in some cases. If the lead is sound but has lifted or pulled away from the mortar joint, it can be re-dressed and re-pointed without full replacement. If the lead itself is oxidised, brittle or holed, replacement is the only reliable fix. We assess every job honestly — we won't replace lead that can be saved.

We specify code 4 lead as the minimum on all Eastbourne properties, and code 5 on any property within approximately 500 metres of the seafront. Code 3 lead — which some contractors use because it is cheaper — corrodes and fails significantly faster in coastal conditions. The additional cost of code 4 or 5 over code 3 is modest; the difference in lifespan is significant.

Correctly specified and installed lead flashing — code 4 minimum, code 5 near the seafront — should last 40–60 years in Eastbourne conditions. Underspecified lead (code 3) near the coast often fails within 10–15 years. The most common cause of early failure is incorrect code specification combined with inadequate fixing into the mortar joint.

Small sections of lead that have lifted or cracked can sometimes be re-dressed and re-secured without full replacement. However, if the lead has thinned through corrosion, has been incorrectly lapped, or is significantly underspecified for the coastal location, replacement is almost always the right answer. Patching thin or corroded lead is a short-term fix that typically lasts only 2–5 years.