Lead flashing, valley lining, soakers, and lead gutter work for homes in Swaffham should be carried out to BS EN 12588 standards.
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Lead is the material roofers use wherever a roof surface meets a vertical element - a chimney stack, a parapet wall, a dormer cheek, a flat-to-pitch junction. Correctly formed and fixed, it handles the movement and weather that would defeat any other material. When it fails, or when it was never done properly in the first place, the consequences show up as damp patches, wet plaster, stained ceilings, and eventually damaged timbers.
The jobs we carry out in lead include step and cover flashings around chimney stacks, apron flashings, valley linings where two roof slopes meet, soakers at abutments, dormer flashings, and lead-lined box gutters. Lead work should be to BS EN 12588 - the British Standard that specifies the quality and minimum thickness of milled lead sheet for each application.
Lead has a long working life when it is installed correctly, but it is not indestructible. The most common causes of failure are thermal movement, mortar joint decay, and poor original installation.
Lead expands and contracts significantly as temperatures shift between seasons. Each bay of lead sheet must be kept to a maximum length - typically around 1.5 metres - and fixed in a way that allows it to move freely at one end. When this is not done, the lead works loose, pulls out of the chase in the mortar joint, and the seal breaks. Stripping out old lead and re-forming it correctly is therefore not just about replacing like for like; it often means correcting the underlying detail that caused the first failure.
Mortar joints open up over time, particularly on older brick chimneys and stone copings. Once the joint that holds the top edge of the flashing opens, rain runs straight behind the lead. Re-pointing that joint is part of any proper flashing repair, not an optional extra.
Where previous repairs used bitumen-based self-adhesive strips bonded over existing tiles or brickwork, these are a short-term fix. They do not form the mechanical bond of properly chased-in lead, and they become brittle and lift at the edges. When we strip one of these back, there is often deteriorated or missing material underneath that has been concealed rather than repaired.
If you have noticed signs of a lead failure - water ingress around a chimney, a damp patch on a bedroom ceiling after rain, or discolouration on an internal wall near a dormer - you may have a wait before the work can be scheduled. Here is what you can sensibly do in the meantime, and what you should leave alone.
If water has come through into a ceiling void or a room, move anything valuable or vulnerable away from the affected area. Place a bucket or tray under any drip rather than letting water pool on a ceiling board. A ceiling that has absorbed a lot of water can fail without warning, bringing plaster and debris down. If a ceiling looks distorted or bowed, keep everyone out of the room and do not poke, prod or pierce it.
Keep a note of when the leak occurs and how heavy or light the rain is at the time. This is genuinely useful information. A leak that appears only during prolonged heavy rain from a particular direction points to a different problem than one that drips after any rainfall. When a roofer comes to look, this context helps them narrow down the source faster.
Tube sealants, expanding foam, and roofing tape products sold in DIY shops are not solutions to a failed lead flashing. The problem is not usually a crack in the lead that can be filled - it is that the lead has pulled away from the joint it was sealing, or that the mortar behind it has opened up. A tube of sealant pushed into a gap may slow the ingress temporarily, but it rarely stops it, and it can make the underlying problem harder for a roofer to diagnose and correct properly. In some cases it pushes the water sideways into a new path.
The same applies to adhesive flashing tape sold as a DIY fix. It bonds to a dry surface only, which a roof rarely is when you need it. It does not replicate the mechanical fixing of a properly chased lead flashing and will not last a winter.
Attempting to inspect or repair lead flashings from the roof is dangerous without proper access equipment. Tiles are slippery when wet. Flat roof surfaces may not be as solid as they look. Lead itself is slippery and can distort underfoot. A roofer accessing the roof will use a ladder stand-off or staging boards to spread weight and protect the tiles. Without this equipment, walking on a pitched roof risks a fall and can break tiles in the process, turning a lead problem into a tile problem as well.
If you want to get a sense of the roof's condition from the ground, binoculars are a useful tool. From ground level, look at the chimney flashings for any obvious gaps, lifted edges, or open mortar joints. Look at the valleys for debris build-up or lifted lead. These observations are worth passing on when you speak to a roofer.
The loft is often where a problem becomes visible before it reaches a ceiling. If it is safe to access, go up with a torch after heavy rain and look around any chimney penetration, at the underside of the roof deck around dormer cheeks, and at the eaves where valleys terminate. Wet felt, wet insulation, or water dripping from a rafter gives you a clearer picture of where the water is entering. Take a photograph if you can - it is useful context for the roofer.
Finding water in the loft does not mean the problem is directly above. Water can travel along a rafter or batten for some distance before it drips. The entry point is often higher up the roof than where the water appears.
If the ingress is severe and you need to limit further damage before a roofer can attend, a roof tarpaulin weighted or tied at the edges can reduce water entry. This is genuinely a temporary measure only - a tarpaulin on a pitched roof is not secure in wind and needs to be properly anchored. If you are not confident doing this safely from ladder level at the eaves, do not attempt it. The water damage is recoverable; a fall is not.
A proper lead flashing repair begins with stripping out what is there. The old lead comes off, the mortar chase is raked back, and the substrate is inspected. If the brickwork behind is friable or the tiles or slates in the area are broken, those issues are dealt with first. New lead is then cut to the correct code for the application, dressed to shape, and fixed with the appropriate clips before the chase is re-pointed in suitable mortar. The result should look clean and should not rely on any sealant over the top.
Valley relining follows a similar principle - strip, inspect the boards and tile courses on each side, reline with lead to the correct width for the pitch, dress the edges cleanly, and make sure the base of the valley runs freely to the gutter.
For a chimney stack with step and cover flashings and a new apron, a typical price in Norfolk is in the range of £350 to £700. This varies with the size of the stack and the amount of mortar work involved. Valley relining for a typical house varies widely but often falls between £400 and £900 depending on the length and the pitch. These are not fixed-price figures - the actual cost depends on what is found when the old material is stripped back, the access required, and the lead code specified.
Call us to arrange a look at your property in Swaffham. We cover Fakenham and the surrounding area including Dersingham, East Dereham, Holt, and villages across Norfolk.
Lead remains the preferred material for complex junctions on pitched roofs because it can be worked precisely around irregular shapes and still form a continuous, durable seal. EPDM rubber is used on flat roofs but is not the right choice for chimney or valley detailing on a pitched roof. Aluminium flashings are sometimes used but have a shorter expected life and are harder to dress to a clean finish. On listed buildings and in conservation areas, lead is typically the only material the local planning authority will approve, so there is often no choice regardless of cost.
If you are in Swaffham or nearby and need advice on whether your lead work needs replacing or repairing, call Fakenham Roofers and we will give you a straight answer.
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