Why choose the Premium Code 4 1200mm 6m Roofing Lead?

The code 4 1200mm x 6m roofing lead is the widest rolled lead sheet commercially available under BS EN 12588. At a massive 1200mm (1.2m) wide and 6m long, this premium roll is designed for the most demanding roofing situations where maximum single-sheet coverage, outstanding durability and minimal jointing are essential.

This ultra-wide format is used on heritage buildings, complex architectural projects, large commercial roofs, deep parapet walls, oversized box gutters, chimney gutters and flat-roof junctions where standard sheet sizes are simply not adequate. By choosing code 4 1200mm x 6m roofing lead, installers can create long, continuous, watertight sections with dramatically fewer joints—improving both the structural performance and visual appearance of the roof.

Code 4 provides a perfect balance of weight, workability and strength, making it the preferred specification for major weathering systems.

To calculate coverage and reduce waste, try our
Lead Flashing Calculator.

Typical uses for Code 4 1200mm 6m Roofing Lead

• Deep parapet wall coverings requiring extensive vertical or horizontal span.
• Major box gutter lining on heritage or commercial buildings.
• Large chimney back gutters, front aprons and stepped flashings.
• Flat-to-pitched roof transitions where wide sheets reduce joint frequency.
• Dormer cheek cladding over large construction areas.
• Ultra-wide abutment flashings and complex corner details.
• Churches, historic estates, listed buildings and major restoration projects.
• Situations where reduced jointing is essential for long-term reliability.

The benefits of using a 6m continuous length

With the code 4 1200mm x 6m roofing lead, the sheet length becomes a key performance advantage. A 6m roll can cover vast areas quickly and with fewer seams, leading to superior waterproofing, better aesthetics and lower installation costs.

• Massively reduced number of laps and joints.
• Far stronger and more reliable waterproofing performance.
• Cleaner architecture for visible parapets and elevations.
• Significant labour savings on large roofs.
• Perfect for premium-grade conservation projects.

When maximum coverage and minimal disruption are needed, this roll is unmatched.

Professional installation guidance

As the widest Code 4 sheet available, code 4 1200mm x 6m roofing lead requires full substrate support and precise detailing. Ensure the base is smooth, rigid and free from sharp edges. Thermal movement must be fully accounted for following LSTA/LSA guidance.

Always avoid over-dressing or overstretching. Use appropriate fixings and protect the surface immediately with patination oil.

All chases should be pointed with mortar or sealed using
Lead Mate Sealant.

Installation essentials

1. Prepare the substrate: Support the full 1200mm width evenly.
2. Dress the sheet carefully: Avoid stress marks and stretching.
3. Fix using correct fasteners: Choose copper or stainless nails from our
   Lead Fixings Range.
4. Seal the chase: Apply mortar or Lead Mate as required.
5. Protect the finish: Use patination oil across the full sheet immediately after installation.

Further resources & learning

Explore more about professional leadwork through:
The Lead Handbook,
The Lead Lads,
and advanced guidance from
Neal Roofing.

Complete the system

Pair code 4 1200mm x 6m roofing lead with:
Hall Clips,
Lead Underlay,
Lead Mate Sealant,
Patination Oil,
and our full
Accessories Range.

At a glance — Code 4 1200mm 6m Roofing Lead

All values approximate. Always follow BS EN 12588 and LSTA/LSA installation best practice.