Lead Work in Mildenhall

Expert Lead Work
in Mildenhall

Lead Work for Homes in Mildenhall

Newmarket Roofers carry out all types of lead work for homeowners in Mildenhall and the surrounding villages - from chimney step flashings and valley liners to parapet details and dormer abutments. Lead should be hand-dressed on site to BS EN 12588 standard.

This page focuses on materials and options. If you are trying to decide whether to use traditional lead, a modern alternative or a combination of both, the information below should help you make a genuinely informed choice rather than just taking a roofer's word for it.

Why Lead Has Remained the Standard for So Long

Cast or milled lead has been used on British roofs for centuries, and it is still the first choice of most experienced roofers for good reason. When it is correctly dressed and detailed, it outlasts virtually every other flashing material. BS EN 12588 milled lead sheet typically carries a manufacturer's expected service life of around 60 years, and well-installed lead on a well-maintained roof can last considerably longer than that.

Lead is also genuinely workable on site. A good plumber or roofer can dress it around complex shapes - chimney stacks, curved bay window roofs, dormer cheeks with multiple angles - in a way that rigid or semi-rigid alternatives simply cannot match. That workability means the finished detail can be exactly right for the specific junction, rather than a close approximation of it.

It bonds well to masonry chases, sits stably on roof surfaces, and is heavy enough that wind uplift is rarely an issue when it is correctly fixed.

The Downsides of Lead You Should Know About

Lead is expensive, and the price of lead as a raw material has risen significantly over recent years. For a large valley liner or an extensive parapet detail, the material cost alone is substantial. On smaller jobs - a short section of flashing on a simple chimney - the cost is proportionate, but it is still the most expensive flashing option per square metre.

Theft is a real concern. Lead is valuable scrap, and sections of it do get stolen from accessible flat roofs, valley gutters and lower-level abutments. If your property has easy roof access or a history of lead theft locally, that is a practical consideration when deciding on materials.

Incorrect installation is also more damaging with lead than with some alternatives, because the consequences of getting thermal movement wrong - cracking, creep, split joints - take years to become apparent but are expensive to put right. Lead must be laid in correctly sized bays with proper drips and rolls. A strip that is too long will fail.

Code Grades Explained

Lead sheet comes in different thicknesses, referred to by code number. The correct code depends on where the lead is being used.

• Code 3 (1.32mm) - sometimes used for small soakers, but rarely recommended for exposed flashings.
• Code 4 (1.80mm) - the standard minimum for most step flashings, cover flashings and soakers. Suitable for most domestic chimney and dormer work.
• Code 5 (2.24mm) - preferred for valley liners, parapet gutters and any area carrying significant water flow. More resistant to foot traffic during maintenance.
• Code 6 (2.65mm) - used for flat roof coverings, large valley gutters and any detail where the lead is also acting as a water channel rather than just a flashing.

Using too light a code is a common false economy. Code 3 on an exposed chimney flashing will need replacing much sooner than Code 4 or Code 5 in the same position.

Lead-Effect Alternatives: What They Are and When They Make Sense

A number of lead-effect alternatives have come onto the market over the past two decades. The most widely used are zinc-coated or zinc-alloy materials and self-adhesive flashing tapes based on a butyl or bitumen-bonded lead-effect facing. It is worth being clear about what these products actually are.

• Zinc and zinc-alloy sheet - a genuine metal alternative that can be dressed in a similar way to lead, though it is less malleable. Zinc is lighter than lead, which can be an advantage or a disadvantage depending on the location. It is less vulnerable to theft because the scrap value is lower. Service life is generally shorter than lead in comparable grades, though a well-installed zinc flashing will last many years. It is not suitable for every application and is more susceptible to damage if foot traffic is a regular requirement.
• Aluminium flashing - lighter still and corrosion-resistant. Less workable than lead or zinc. Can react with certain mortars and masonry materials if not correctly sealed at the edge. Typically used in lower-risk locations or as a temporary repair.
• Self-adhesive flashing tape - products like mineral-faced bitumen tape are widely available and are sometimes used for emergency or temporary repairs. They are not a substitute for properly dressed lead or metal flashing. Their service life is significantly shorter and they are not appropriate as a permanent solution for chimneys, valleys or abutments. If a roofer proposes flashing tape as the main repair for an exposed location, ask why lead is not being used.

When to Repair and When to Replace

Repair is often the right answer if the existing lead is sound but has lifted, the chase has eroded, or a small section has cracked at a single point. A competent roofer can re-dress a lifted edge, recut the chase, and re-point with lead wedges and appropriate mortar. This extends the life of lead that still has good years in it.

Full replacement makes sense when the lead is cracked across multiple bays, has been repaired several times already, is the wrong code for its location, or shows signs of fatigue across its whole length. Replacing like-for-like with the correct code and correctly sized bays gives you a detail that should not need attention again for decades.

What to Ask a Roofer Before They Start

Before agreeing to any lead work, it is reasonable to ask:

• What code of lead are you using, and why is that the right choice for this location?
• Are you dressing the lead in bays, and how long will each bay be?
• How will the lead be fixed - wedged into a cut chase, or just pointed into a raked joint?
• Will soakers be used under the step flashing, or just a single continuous piece?

These are not trick questions - a roofer with genuine experience of lead work will answer them without hesitation. If you are in Mildenhall and want to discuss what your property needs, call us and we will give you a straight answer.