Thetford Roofers carries out lead flashing installation and repair for homeowners in Stanton, sealing chimneys, valleys, skylights and abutments to a traditional, durable standard.
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Lead flashing is the shaped metal that seals every junction where your roof meets something else: a chimney stack, a parapet wall, a skylight frame, a dormer, or the line where a lean-to roof meets the main house wall. Water finds its way in at these junctions before it gets through the tiles themselves. A well-laid lead detail, correctly stepped, dressed and secured with mortar or lead wedges, will outlast most other roofing materials by a considerable margin.
The lead used on domestic roofs is measured in a code system. Code 3 and Code 4 sheet is typical for flashings on chimney sides and small abutments. Code 4 and Code 5 is used where the lead needs to span further or bear more movement, such as in valleys or where a flat roof meets a wall. Getting the code right for the application matters: too thin and the lead cracks under thermal movement; too heavy and it may sag or be overkill for the budget.
Lead work is priced differently from tiling or flat roofing because the labour is skilled and the material itself carries weight in cost. For straightforward lead flashing repairs to a chimney stack on a standard pitched roof, you should expect to pay in the region of £200-£500 depending on how much lead needs to be replaced and how high the stack sits above the ridge. A full chimney re-flash, where all four sides of the stack are stripped and re-done with new stepped flashing, back gutter and front apron, typically runs £400-£900 on a two-storey house.
Valley re-leading, where the channel running between two roof slopes is lined in lead rather than a mortar-bedded valley tile, costs more because the lead area is larger and the work is more physically demanding. A single valley on a typical semi-detached house in this part of Suffolk might cost £500-£1,200 depending on length, pitch and access. Scaffold is sometimes unavoidable on steeper roofs; if it is needed, that adds to the overall cost but should always be explained to you before work starts.
The price of lead as a raw material fluctuates. Milled lead sheet is bought by the roll or sheet from merchants, and the code and quantity needed affects the materials bill directly. When you receive a quote, ask the contractor to separate the lead material cost from the labour so you can see where your money is going.
Several factors raise the final price above the basic range:
A damp patch on a chimney breast wall, especially after rain but not after a dry spell, is the clearest sign that the flashing at the base of the stack has failed. Staining on the ceiling near a skylight or dormer points to the same issue. In older properties, the pointing that holds the lead wedges in the chimney mortar joints can erode over years, allowing the flashing to lift and let wind-driven rain behind it.
Cracked or split lead, visible from the ground with binoculars, indicates the metal has fatigued. Lead expands and contracts with temperature changes, and if it was installed in one long piece rather than correctly lapped sections, cracking is almost inevitable after enough years. Lead that has been painted over with bitumen products in the past also tends to reach the end of its life faster because the bitumen prevents the lead from moving naturally.
For a chimney re-flash, the old lead is stripped completely. The mortar joints that held the wedges are raked out and re-cut if needed. New lead is cut, shaped and dressed to the brickwork in sections - typically no more than 1.5 metres per section to allow for thermal movement. Soakers, where used, are slipped under the tiles alongside the stack before the stepped flashing is laid over the top. The front apron is fitted last, dressed to the tiles below. All joints are lapped correctly and the lead is secured with mortar or correct lead wedges and dressed flat.
A good lead job should look neat and be fully bedded. There should be no gaps at the top edge and the flashing should follow the line of the roof without bulging or sitting proud of the tiles.
We carry out lead work across Stanton and the villages nearby. We also cover Thetford, Watton, Mundford, Brandon and the surrounding villages including Elveden, East Wretham, Croxton, Brettenham, Barnham and Methwold. Feltwell, Mildenhall and Kilverstone are also within the area we serve.
If you have a leak near a chimney, skylight or roof junction, call Thetford Roofers and ask for a roof survey so we can assess the lead work and give you a specific price before any work begins.
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Call any time. Calls are answered day and night and passed straight to our roofers.