The IG L1/HD 150 Cavity Wall Lintel is a high-performance structural solution engineered for heavy-duty support in cavity wall construction. Designed to accommodate cavity widths between 150mm and 165mm, this lintel is ideal for larger wall builds where enhanced load-bearing capacity and thermal efficiency are critical. Manufactured from galvanised steel and precision-formed to IG’s exacting standards, it offers exceptional durability, corrosion resistance, and compliance with UK Building Regulations.

This lintel features a dual-leaf support profile, with a 102mm outer leaf and 100mm inner leaf, making it suitable for standard brick and block configurations. The integrated expanded polystyrene insulation core improves thermal bridging performance, helping builders meet Part L requirements without compromising structural integrity. Its robust profile supports uniformly distributed loads across a wide range of spans, making it suitable for both residential and commercial applications — from large window openings to wide-span doorways.
Each unit is factory-treated with a minimised spangle galvanised finish, ensuring long-term resistance to moisture ingress and site wear. Cut edges are protected to prevent rusting, and the lintel’s fire rating compliance to BS 476: Part 20:1987 makes it suitable for regulated builds. With lengths available from 600mm to 4800mm, the L1/HD 150 offers flexibility across project types, while maintaining consistent performance and ease of installation.
Whether you're specifying for a new build, extension, or retrofit, the IG L1/HD 150 delivers the strength, reliability, and compliance that trade professionals demand — backed by IG’s reputation for structural excellence.