Code 4 Lead Roll

If you’re after a flexible, durable, and wear-resistant flashing material for your roofing project, the Code 4 Lead Roll from Associated Lead Mills ticks every box. With its increased thickness and excellent malleability, Code 4 lead is the go-to option for a wide range of roofing applications—especially for pitched roofs, dormer cheeks, vertical cladding, and complex flashing details. Compared to the thinner Code 3 option, Code 4 lead offers significantly better resistance to wear and weather exposure. Its added gauge makes it ideal for more demanding jobs, while still being easy to shape and handle on site.

Why Choose Code 4 Lead?

At 1.8mm thick and weighing 20.41 kg per square metre, Code 4 Lead Rolls offer a 36% increase in gauge over Code 3. This extra thickness not only enhances durability but also improves thermal movement resistance—meaning longer flashing strips can be used safely. In fact, the maximum flashing length can be extended by up to 50%. Despite its improved performance, Code 4 lead remains competitively priced, making it a smart investment for any project where longevity and reliability matter. From chimney flashings to apron and hip details, this lead roll covers it all.

Versatile Sizes for Every Project

At JJ Building Materials, Code 4 Lead Roll is available in a range of widths and lengths to match any scale of work. Two of the most popular sizes are 240mm x 6m and 300mm x 6m—ideal for everything from small touch-ups to larger structural work. Lead has stood the test of time as a building material and remains a favourite in both residential and heritage applications. From private homes to historic churches and castles, lead flashing continues to offer unmatched protection and performance.

Trusted Quality and Sustainability

Supplied by Associated Lead Mills, this lead roll carries the LSA-approved label and meets all the standards supported by the Lead Sheet Association. It’s easy to cut, shape, and work with, making it a favourite for contractors and roofers alike. Not only is it incredibly durable, but it’s also a sustainable choice. Lead is fully recyclable, and its low maintenance requirements make it an environmentally responsible option that will last for decades when correctly installed.

Product Features

• Strong, flexible Code 4 Lead Roll suitable for pitched roofs, cladding, and flashing
• 1.8mm thickness offers enhanced durability and resistance to thermal movement
• Available in multiple sizes to suit a variety of projects
• Long-lasting material with proven performance over centuries
• Fully recyclable and supported by the Lead Sheet Association (LSA)

Frequently Asked Questions

1. What is Code 4 lead typically used for?

Code 4 lead is commonly used for chimney flashings, ridges, hips, valleys, dormer cheeks, and vertical cladding. It’s a great all-round option for most pitched roofing applications due to its strength and flexibility.

2. How is Code 4 different from Code 3 lead?

Code 4 lead is 36% thicker than Code 3, making it more durable and suitable for a wider range of applications. It also allows for longer lengths of flashing—up to 1.5 metres—thanks to its improved resistance to thermal movement.

3. Is Code 4 lead flashing environmentally friendly?

Yes, lead is a fully recyclable material. It’s also long-lasting and requires very little maintenance, which means fewer replacements over time and reduced environmental impact. The lead from Associated Lead Mills is LSA-approved, ensuring it meets sustainable industry standards.

Check out our roofing supplies.

Explore more from our Code 4 lead range.

At JJ Building Materials, we're committed to supplying quality building products at competitive prices, backed by the service and expertise you'd expect from an established independent merchant. Whether you're a trade professional managing large-scale projects or a homeowner taking on a DIY renovation, we're here to help you find the right products for the job.

As part of the JJ Roofing Supplies Group, we build on decades of experience supplying construction materials across the UK. We've expanded beyond roofing to offer a growing range of building materials, including timber, insulation, landscaping products, plumbing supplies, flooring, doors, bricks, fencing, garden buildings and much more – all available to order online with nationwide delivery.

We work with many of the industry's leading manufacturers to bring you trusted products that meet the highest standards of quality and performance. Our team is passionate about providing excellent customer service, competitive pricing and a straightforward shopping experience from start to finish.

When you shop with JJ Building Materials, you can expect:

• Competitive prices on leading brands and quality products.
• Nationwide delivery across the UK
  
• A constantly expanding range of building and landscaping materials.
  
• Friendly, knowledgeable customer support.
  
• A trusted business backed by the JJ Roofing Supplies Group.
  

Every order is personally reviewed by our experienced team to ensure everything is correct before dispatch. We offer delivery from as little as the next working day on selected products, so please refer to the dark blue Estimated Delivery box above for the expected delivery timeframe for this item.

We work with trusted manufacturers and specialist delivery partners to ensure your order arrives safely and on time. You'll receive tracking details once your order has been dispatched, and if we need to confirm any delivery details, one of our team will contact you directly to keep everything running smoothly.

Roof Tiles & Fittings:

We recommend ordering an additional 10% of roof tiles to allow for any breakages that may occur during delivery or handling. Roof tiles are naturally fragile, and having a few extra on site helps prevent delays and ensures your roofing project can be completed without interruption.

Multiple Products from the Same Supplier

If you're ordering multiple products from the same supplier, your order will be dispatched together once all items are ready. This means the longest lead time will apply.

If you need part of your order sooner, please call us on 01202 113233. We can arrange a split delivery, although an additional shipping charge will apply.