Cavity Wall Structural Lintel L1 /S 150mm – 2700mm ( SD )

The Cavity Wall Structural Lintel L1/S 150mm – 2700mm (SD) by Stock Gap Limited is a standard-duty galvanised steel lintel engineered for cavity wall constructions with a cavity width of 150–165mm. At 2700mm in length, it is one of the most widely specified sizes for spanning larger window and door openings in residential and light commercial masonry builds. Designed for builders, contractors, and self-builders, it delivers reliable structural support while meeting UK building regulations.

Key Features and Specifications

• Type: Standard Duty (SD) cavity wall structural lintel — L1/S profile
• Length: 2700mm (2.7m)
• Cavity Width: Suitable for 150–165mm cavity wall construction
• Outer Leaf: Designed for 100mm brick or blockwork
• Inner Leaf: Suitable for 100–115mm blockwork
• Material: High-quality galvanised steel — corrosion-resistant for long-term durability
• Insulation: Factory-fitted expanded polystyrene insulation reduces thermal bridging
• Built-in plaster key and DPC: Simplifies finishing and weatherproofing on site
• Load Distribution: Supports uniform distribution of masonry loads, timber floor loads, and roof loads
• Installation: Blockwork built tight against the inner face; mortar bed placed on top of blockwork before floor units are laid for even load distribution. Prop lintels over 1500mm until masonry is fully cured.
• Sold: Individually

Applications

• Spanning window and door openings in 150–165mm cavity walls
• New-build residential houses and housing developments
• Single-storey and two-storey extensions
• Refurbishment and renovation projects requiring structural lintel replacement
• Light commercial masonry construction
• Fair-faced inner leaf masonry applications

Why Choose This Product

The Stock Gap Limited Cavity Wall Structural Lintel L1/S 150mm – 2700mm (SD) offers a proven combination of structural performance, corrosion resistance, and ease of installation. The galvanised steel construction provides long-term durability, while the factory-fitted insulation reduces thermal bridging — a key requirement for energy-efficient buildings compliant with UK Building Regulations. The built-in plaster key and DPC save time on site. Trade quantities are welcome, making this an efficient choice for contractors managing multiple openings across a project.

Delivery in and Around London

Stock Gap Limited offers delivery of this cavity wall lintel to London boroughs including Croydon, Lewisham, Southwark, Camden, and Hackney, as well as Greater London areas such as Enfield, Bexley, Redbridge, and Barnet. Deliveries also extend to surrounding counties including Kent, Essex, Surrey, and Hertfordshire. Trade quantities are welcome — contact us for bulk pricing and scheduled site deliveries.