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.
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