Stressline Lintels

Choosing the Right Stressline Lintel

Stressline lintels are widely used across domestic builds, extensions and commercial construction projects throughout the UK. The range includes cavity wall lintels, solid wall box lintels, timber frame lintels and heavy-duty structural lintels designed for a wide variety of loading conditions and wall constructions.

Whether you are building a standard masonry cavity wall, forming a larger bifold door opening or working on a timber frame extension, Stressline offer a range of lintel types and duty ratings to suit the application.

Popular products within the range include the Stressline SL90 Standard Duty 100mm Cavity Lintel, the Stressline SL110 Standard Duty 125mm Cavity Lintel and the Stressline 100mm Box Lintel range for solid wall construction.

Popular Stressline Lintel Types

Stressline Cavity Wall Lintels

Stressline cavity lintels are designed for modern insulated cavity wall construction and remain one of the most commonly specified lintel types for UK housing projects. Available for multiple cavity widths, these galvanised steel lintels are suitable for supporting masonry loads, timber floor loads and roof loads above standard window and door openings.

The SL90 cavity lintel is particularly popular for standard 100mm cavity wall construction, while the SL110 range is commonly used for wider 125mm cavity applications.

If you are comparing different cavity wall systems, our guides on what a cavity wall lintel is and cavity wall insulation explain how lintels integrate within insulated cavity construction.

Stressline Box Lintels

Stressline box lintels are designed primarily for solid wall construction and internal load-bearing walls where cavity support is not required. These profiles are commonly used within garage openings, older solid wall properties, internal masonry walls and renovation projects.

Browse our range of Stressline box lintels for standard and heavy-duty solid wall applications.

Stressline Timber Frame Lintels

Stressline also manufacture specialist timber frame cavity lintels designed specifically for timber frame construction methods and insulated external wall systems.

These lintels are commonly used within modern housing developments and off-site manufactured construction where timber frame wall systems require dedicated cavity support.

Technical Support and Load Span Guidance

Selecting the correct lintel depends on more than just the opening width. Factors including cavity size, wall construction, bearing length and structural loading all affect the correct specification.

Stressline lintels should always be selected using the manufacturer’s load span tables and technical guidance. Common considerations include:

• Cavity width
• Wall construction type
• Structural opening size
• Masonry and floor loads
• Roof loading conditions
• Bearing requirements

If you are unsure which lintel is suitable for your project, our team can help identify an appropriate option based on your wall construction and opening requirements.

For broader guidance, visit our Complete Guide to Lintels in the UK, browse our wider Lintels Collection or read our guide on how much weight a steel lintel can support.

Important

Lintels should always be selected based on the structural requirements of the project rather than opening size alone. Building Control may require confirmation that the correct lintel specification has been used for the load being supported, particularly on larger openings and load-bearing walls.

Stressline Lintels Available for UK Delivery and Collection

We stock a wide range of Stressline lintels for fast UK delivery and collection. Whether you need a single replacement lintel, multiple cavity lintels for an extension project or bulk quantities for a larger development, our team can assist with product selection, stock availability and practical guidance.

Wade Building Supplies also supply a wide range of steel lintels and cavity wall lintels from leading UK manufacturers for domestic, commercial and trade construction projects.