Why choose code 5 390mm 3m roofing lead?

The code 5 390mm 3m roofing lead roll is a premium heavy-gauge sheet designed for wide flashings, parapet weatherings, gutter linings and structural joints that demand long-term reliability. At 390mm wide, it provides more coverage than standard flashing widths while still remaining manageable for installation and dressing.

Manufactured to the BS EN 12588 rolled lead material standard, code 5 390mm 3m roofing lead offers consistent thickness (approx. 2.24mm), superior durability and predictable behaviour under forming. BS EN 12588 governs the material properties, while workmanship and detailing must follow the Lead Sheet Training Academy (LSTA) guidance and BS 6915.

This 390mm width is a versatile choice for chimney aprons, parapets, dormer cheeks, bay roofs and other details where the lead sheet functions as a primary weathering element rather than a simple flashing.

For material calculations, bay sizing and roll weights, use our
Lead Flashing & Lead Roll Calculator.

Typical uses for code 5 390mm 3m roofing lead

This mid–wide code 5 roll is ideal for:

• Chimney aprons, front gutters and back gutters.
• Wide flashings on parapets, abutments and transitions.
• Bay roof coverings and heritage detailing.
• Gutter linings, channels and structural weatherings.
• Dormer tops, cheeks and deep projection weatherings.
• Projects requiring heavy-gauge durability and long service life.

Why Code 5 is preferred for wide weatherings

Wider coverings and heavy flashings must accommodate greater thermal expansion and environmental loading. Code 5 390mm 3m roofing lead offers the robustness needed for long-term performance on these details.

• Excellent fatigue resistance under movement cycles.
• Greater rigidity for structural weatherings.
• Improved resistance to uplift and wind exposure.
• Confidence for conservation, premium domestic and coastal projects.

When installed to LSTA principles and the requirements of BS 6915, Code 5 offers outstanding lifespan and reliability for exposed or complex detailing.

Installation guidance

Install code 5 390mm 3m roofing lead in accordance with the Lead Sheet Training Academy / Lead Sheet Association manuals and the detailing rules within BS 6915. BS EN 12588 confirms the sheet’s material standard but does not cover workmanship or detailing.

For accessible technical overviews of these documents, see:
The Lead Lads — BS 6915 Leadwork Guidance and
Neal Roofing — BS 6915 Leadwork.

After fixing, apply patination oil to the code 5 390mm 3m roofing lead to control early oxidation and ensure consistent weathering.

Where the sheet enters masonry, use traditional mortar bedding or
Lead Mate Sealant
depending on the detail and substrate.

Installation essentials

1. Prepare the substrate: Use smooth, fully supported decking with appropriate
   Lead Underlay.
2. Size bays appropriately: Follow LSTA and BS 6915 limits for Code 5 bay sizes.
3. Fix with correct fasteners: Use copper or stainless nails/clips from our
   Leadwork Fixings range.
4. Form watertight details: Dress welts, drips and laps according to BS 6915.
5. Protect the finish: Apply patination oil immediately after installation.

Further resources & learning

For a full explanation of the rolled lead material standard, see
BS EN 12588 — The Ultimate Guide.
Additional technical content is available in
The Lead Handbook
and via our main knowledge hub at
The Lead Lads.
For specialist installation, visit
Neal Roofing — Leadwork Services.

Recommended accessories

Recommended additions for code 5 390mm 3m roofing lead include:
Lead Underlay,
Patination Oil,
Lead Mate Sealant,
and premium fixings from our
Leadwork Fixings range.

At a glance — code 5 390mm 3m roofing lead

Figures approximate. Use BS EN 12588 for material specification and follow LSTA / BS 6915 guidance for workmanship, bay sizing and jointing.