Lead Roofing Yorkshire

Rolled lead sheet is one of the most durable and versatile roofing materials available when it is specified and installed correctly. It is commonly used for roofs, gutters, valleys, flashings, dormers, bay windows, chimney details and weatherings.

Lead is particularly valuable on heritage and traditional buildings because it can be formed to complex shapes, dressed around details and integrated with slate, tile, stone, masonry and timber substrates.

Manufacturing Standard: BS EN 12588

Rolled lead sheet used for building purposes should comply with BS EN 12588, which sets out requirements for lead sheet thickness, weight, tolerances and material quality.

• Controls thickness and weight tolerances
• Establishes requirements for chemical composition and mechanical properties
• Supports consistent performance across roofing applications
• Provides a recognised benchmark for rolled lead sheet used in construction

Lead Codes and Correct Specification

Lead sheet is supplied in different codes, with each code relating to thickness and weight. The correct code depends on the application, bay size, exposure, fixing method and movement allowance.

Using the wrong code of lead, or installing lead in bays that are too large, can reduce service life and cause premature splitting or distortion.

Common Lead Flashing Codes

Key Considerations for Leadwork

• Correct lead code: the lead thickness must suit the intended detail.
• Bay sizing: lead must be divided into suitable bays to allow for thermal movement.
• Substrate formation: decks, boards, falls and fixings must be suitable before lead is installed.
• Ventilation: substrate design must consider condensation risk.
• Compatibility: underlays and separation layers may be required to prevent corrosion.
• Fixing method: clips, rolls, drips and welts must allow movement without restraint.

Leadwork is not simply a matter of dressing sheet material into place. Correct design, substrate preparation and detailing are essential to long-term performance.

Why Use a Specialist Leadworker?

Lead is a traditional material, but successful installation requires specialist knowledge. The material moves significantly through thermal expansion and contraction, so details must be designed to accommodate movement.

1. Correct Design and Detailing

• Lead codes must match the application.
• Bay sizes must be controlled.
• Drips, rolls, welts and laps must be formed correctly.
• Details must discharge water safely and avoid trapped moisture.

2. Compliance with BS 6915 and LSTA Guidance

• BS 6915 provides guidance for fully supported lead sheet roof and wall coverings.
• LSTA guidance supports recognised workmanship practice for lead sheet applications.
• Following recognised guidance reduces the risk of premature failure.

3. Substrate and Ventilation

• Lead roofs require suitable support below the lead sheet.
• Ventilation and condensation risk must be considered.
• Separation layers may be required where materials are incompatible.

4. Durability and Long-Term Value

• Correctly installed leadwork can provide long service life.
• Poor installation can lead to splitting, staining, corrosion and water ingress.
• Leadwork should be treated as a specialist trade, not a general roofing add-on.

Leadwork at GNR Roofing

At GNR Roofing, leadwork is treated as a core discipline. We undertake lead roofing and lead detailing across residential, heritage, ecclesiastical and high specification roofing projects.

Typical leadwork services include:

• Lead bay roofs
• Lead dormers and cheeks
• Lead valleys and box gutters
• Chimney flashings and soakers
• Abutment flashings
• Parapet gutters and weatherings
• Ecclesiastical and heritage lead roofing

Within our wider group we also operate The Lead Lads, a specialist leadwork brand focused on rolled lead sheet installation and associated lead products.

Between GNR Roofing and The Lead Lads, we are well placed to provide lead roofing solutions across Yorkshire and selected wider locations.