Lead Work in Norwich
Lead Work Specialists in Norwich
Lead Work on Norwich Period Properties
Norwich's Victorian and Edwardian housing stock uses lead throughout its roofing system — flashing at chimney bases and abutments, valleys between roof planes, back gutters behind parapets and at rear extension junctions, and occasionally as flat roofing on bay window tops and dormers. On properties of this age, original lead is 100-130 years old and well past design life on most unrestored roofs. Failure is typically gradual — micro-cracks that admit moisture slowly before becoming a visible leak.
For listed and conservation-area leadwork, see our heritage roofing page.
Lead Code Weights — What's Correct for Norwich
Lead sheet is specified by code weight — the higher the code, the thicker and longer-lasting the lead. For Norwich conditions: Code 3 (minimum, rarely appropriate for exposed locations), Code 4 (standard for flashings and stepped cover flashings on sheltered applications), Code 5 (standard for valleys, back gutters, and any exposed lead on valley-floor properties where humidity accelerates corrosion), Code 6 (flat roof lead, parapet gutters, and any application where thermal movement is high). We specify Code 5 as our default for valley and back gutter work in Norwich — the additional cost over Code 4 is modest and the service life increase is significant in local conditions.
Valley Re-Leading — What the Job Involves
A valley re-lead on a Norwich property involves stripping the existing lead back to the deck, inspecting the underlying boarding for rot or damage, preparing the new lead with correct welts at each join and a drip at the bottom, bedding the lead correctly without over-fixing (lead must be free to move with thermal cycling), and dressing the lead into the adjacent tile courses. The most common failure in amateur lead work is over-fixing — nailing or cementing lead that then splits when it tries to expand and contract. We form all lead joins using traditional welted techniques rather than solder or adhesive.
Back Gutters and Parapet Gutters
The back gutter — the lead-lined channel between the original house body and any rear extension or lean-to — is the most common lead work failure on Norwich terraced properties. It collects debris from both roof pitches, holds standing water, and corrodes faster than exposed lead on an open roof. We strip, inspect the underlying timber, replace any rotten boarding, and re-lead in Code 5 with correct falls to the outlet. Most back gutter jobs on Victorian terraces are completed in a day.
Lead Flashing at Chimney Stacks
Chimney stack flashing comprises several components: apron flashing at the front, step and cover flashings on each side, and a back gutter or saddle flashing at the rear. Each element must be correctly lapped, welted and fixed to allow thermal movement. On Norwich Victorian properties the most common failure mode is mortar erosion from the ragwork joints — the slots cut into the brickwork that hold the flashing edge. We cut fresh ragwork, point in new mortar, and finish with patination oil to slow oxidation.
AccessGetting Safely onto Norwich Roofs
Leadwork usually needs scaffold or a tower for safe standing time at the detail; chimney and parapet work is always scaffolded. Scaffold is specified for: chimney, parapet and valley work, and any lead detail needing sustained standing time - always itemised in your written quote, never a hidden extra, and we arrange it.
Norwich’s medieval core and Golden Triangle terraces mean tight street frontages, rear-access-only roofs and permit-controlled pavement space for scaffold. Pavement scaffold and skip permits go through Norwich City Council; allow a few working days on streets like Elm Hill, Magdalen Street, Gentleman’s Walk where space is tight.
