Lead Flashing in Old Town
Lead flashing in Old Town carries higher specification requirements than most inland locations. The dominant historic core around St Mary's Church with a mix of Victorian, Edwardian and some pre-Victorian properties; conservation area designation applies to the historic streets means that many Old Town properties have original lead installations now at or past their design life. The local elevated above the town centre with some South Downs wind exposure; less direct salt loading than the seafront but still coastal climate influence; code 4 lead standard throughout accelerates corrosion — we specify code 4 lead as the minimum on all Old Town work, and code 5 on any property within 500 metres of the seafront or in a particularly exposed position.
The most common lead flashing failures we encounter in Old Town involve conservation area compliance on the historic streets. Incorrect lead grades fitted by previous contractors are the single most frequent problem — code 3 lead fails significantly faster in East Sussex's coastal climate and we will not fit it.
Lead Flashing Work We Cover in Old Town
Chimney apron and back gutter replacement. Stepped and cover flashings on chimney stacks. Valley lining replacement — code 4 minimum, properly lapped and clipped. Bay window flat roof lead replacement. Dormer cheek and head flashings. Abutment flashings where extension roofs meet walls. All lead work in Old Town is carried out by experienced lead workers, properly dressed and fixed into the mortar joint — not just pointed over.
Lead Code Specification for Old Town
Code 4 lead is our minimum specification for all Old Town properties. This is heavier than the code 3 that is sometimes installed to reduce cost — code 3 splits under thermal cycling within 8–12 years on exposed elevations. On coastal-adjacent Old Town properties and on chimney stacks with south or west aspects, code 5 is our recommendation. We will not substitute code 3 regardless of budget pressure.
How Lead Flashing Is Correctly Fitted in Old Town
Lead is cut and bent to profile, not just bedded in mortar or frame sealant. Stepped flashings are cut into the mortar joint and secured with lead wedges — not surface-fixed. Back gutters behind chimney stacks are laid with correct falls to the outlets. Patination oil is applied to all new lead on installation — this prevents the run-off staining that bleaches pointing and brickwork on Old Town properties.
Why Lead Flashing Fails on Old Town Properties
The most common cause of lead failure in Old Town is incorrect code — undersized lead that splits under thermal movement. The second cause is poor initial fixing — surface-bedded lead that lifts rather than step-flashed lead that cannot. Age-related fatigue on pre-1960 original lead is the third. In all cases the correct fix is replacement, not patching or sealant application over the existing lead.
Lead Flashing Costs in Old Town
Chimney apron replacement: £350–£550 · Back gutter: £400–£700 · Valley lining: £500–£900 · Full chimney flashing set: £600–£1,100 · All prices include code 4 lead and pointing. Free survey.
Free lead flashing survey for Old Town properties
0132 336 5960Properties on Church Street and High Street are among the most frequent lead flashing call areas we cover in Old Town. If your property was built before 1970 and has not had lead work in the last 15 years, it is worth arranging a free survey.