Why choose the Premium Code 4 300mm 6m Roofing Lead?

The code 4 300mm x 6m roofing lead is one of the most popular long-length lead rolls for wide flashings, deep abutments, parapet walls, chimney work and large-format weathering details. At 300mm wide, this premium 6-metre roll offers exceptional coverage while minimising joints, speeding up installation and providing a superior long-run finish on both modern and traditional roofing projects.

Manufactured to the stringent tolerances of BS EN 12588, each roll of code 4 300mm x 6m roofing lead is precision-milled to deliver uniform thickness, consistent malleability and a long service life. Code 4 remains the industry standard for a wide range of leadworking applications because it strikes the ideal balance between strength, longevity and workability.

The 300mm width is a favourite among roofers working on parapets, chimney back gutters, wide abutments, box gutters and dormer detailing. This added width improves water management and significantly reduces the need for multiple sheets, making your installation cleaner, faster and more reliable in the long term.

For fast on-site quantities and pricing, use our
Lead Flashing Calculator,
designed to help installers and surveyors streamline their ordering process with instant results.

Typical uses for Code 4 300mm 6m Roofing Lead

• Wide abutment flashings requiring substantial vertical or horizontal coverage.
• Chimney back gutters, side flashings and deep apron detailing.
• Parapet wall flashings and coping protection.
• Dormer cheeks, cladding sections and large weathering details.
• Wide roof soakers for large tiles or slates.
• Long continuous flashings where minimising joints is essential.
• Heritage reinstatement projects requiring wide, uninterrupted lead bays.

The advantages of upgrading to the 6m long roll

Compared with standard 3m rolls, a 6m length of code 4 300mm x 6m roofing lead eliminates unnecessary laps, significantly reducing labour time while delivering a cleaner, more professional finish. This is particularly valuable in wide parapet details, continuous flashing lines and deep junctions where structural reliability and visual continuity matter.

Fewer joints also reduces potential capillary pathways and improves long-term water management, especially on:

• low-pitch roofs
• exposed elevations
• heritage conservation work
• commercial roofs with extended parapet lengths

Reduced handling and installation time also creates a measurable cost saving on both small domestic and large commercial roofing projects.

Good practice when installing 300mm lead

Wider lead sheets such as code 4 300mm x 6m roofing lead must be supported by a smooth, continuous substrate. Avoid sharp edges or gaps beneath the sheet and follow recognised Lead Sheet Association (LSA) detailing guidance for drips, laps, joints and upstand heights.

Always avoid stretching the lead, as this can reduce gauge thickness. For finishing work, use neutral-cure sealants like
Lead Mate Sealant
or traditional pointing mortar depending on the specification.

Apply patination oil immediately after dressing to maintain a uniform early appearance and prevent carbonate staining.

Installation essentials

1. Prepare the substrate: Ensure smooth, fully supported bearing for long 6m runs.
2. Cut & form accurately: Dress the code 4 300mm x 6m roofing lead neatly along the full flashing line.
3. Fix appropriately: Use copper or stainless nails from our
   Leadwork Fixings. Avoid over-nailing.
4. Seal chases: Finish with mortar or
   Lead Mate Sealant as required.
5. Protect immediately: Apply patination oil to reduce early oxidation and staining.

Further reading

For additional guidance on detailing, bay sizes, fixings, movement and installation, visit:
The Lead Handbook,
theleadlads.co.uk,
and
Neal Roofing.

Complete the system

Combine code 4 300mm x 6m roofing lead with:
Hall Clips,
Building Paper Underlay,
Lead Mate Sealant,
Patination Oil,
and browse the full
Accessories range for a complete installation kit.

At a glance — Code 4 300mm 6m Roofing Lead

All figures are approximate. Always follow BS EN 12588 and LSTA detailing standards for optimal performance.