An angle lintel, also known as an L-shaped lintel, is a simple steel section commonly used to support masonry above an opening in certain types of wall construction. In practice, they are often seen in single leaf applications or where only one leaf of masonry requires support, but final suitability should always be checked against the manufacturer’s guidance and the requirements of the specific build.
Choosing the right lintel depends on more than just the opening width. Wall type, loading conditions, bearing, and overall construction detail all need to be considered before a product is selected.
What is an angle lintel?
An angle lintel is a steel lintel made from an angled section, designed to provide support over an opening. They are sometimes referred to as angle iron lintels or L-shaped lintels. Compared with more complex cavity lintels, they are generally a simpler product used in more limited situations.
Where angle lintels are commonly used
Single leaf walls
Angle lintels are commonly associated with single leaf wall construction, where one section of masonry needs support over a window, door, or smaller opening. In these situations, the lintel is supporting a single line of masonry rather than a more complex wall build-up.
Outer leaf support in some cavity wall arrangements
In some builds, an angle lintel may be used to support the outer leaf only, rather than the full cavity wall construction. Where this is the case, the exact arrangement should be checked carefully against the wall design and the manufacturer’s technical literature.
Smaller and more straightforward openings
Angle lintels are more commonly seen where the opening is relatively straightforward and the support requirement is limited. As opening widths increase, or where loading becomes more complex, additional checks become more important.
If you are reviewing product options, you can browse our range of L-shaped lintels here.
Where an angle lintel may not be the right choice
Full cavity wall support
An angle lintel should not automatically be assumed suitable for supporting both leaves of a cavity wall. Many wall openings require a purpose-designed cavity lintel instead, particularly where the construction detail, insulation zone, or loading arrangement is more demanding.
Heavier or more complex loading conditions
Where there are significant loads above the opening, wider spans, or structural factors beyond basic masonry support, a simple angle lintel may not be appropriate. In these cases, product selection should be based on the relevant technical data and project requirements.
Situations where compliance details matter
Thermal performance, cavity design, damp protection, and overall wall build-up can all affect lintel choice. A product should never be selected on shape alone without checking how it relates to the wider construction detail.
Angle lintels compared with cavity lintels
The main difference is that cavity lintels are generally designed for more complex wall constructions, whereas angle lintels are more commonly associated with supporting a single leaf of masonry or a more limited application. That does not make one “better” than the other in every case; it simply means they are designed for different purposes.
How angle lintels differ from cavity lintels
Angle lintels and cavity lintels are designed for different types of wall construction. The differences below are general and should always be checked against manufacturer guidance and the specific requirements of the project.
| Feature | Angle lintel | Cavity lintel |
|---|---|---|
| Typical application | Often used where a single leaf of masonry requires support | Designed for cavity wall construction |
| Wall support | Generally supports one leaf only | Designed to support both inner and outer leaves |
| Complexity | Simpler section | More complex design to suit cavity walls |
| Thermal considerations | No built-in insulation | Often incorporates insulation to reduce thermal bridging |
| Use in structural situations | Depends on span, load, and application | Designed for a wider range of structural applications (subject to specification) |
Common mistakes to avoid
- Assuming any steel lintel can be used in any wall type
- Choosing a lintel based only on opening width
- Overlooking bearing requirements and wall construction details
- Using a product without checking the manufacturer’s technical guidance
Key takeaway
Angle lintels are commonly used in certain masonry applications, particularly where support is needed for a single leaf or a relatively straightforward opening. However, suitability depends on the specific construction, span, loading conditions, and manufacturer guidance, so final product selection should always be checked carefully before installation.
To view available products, see our angle lintels category page.
Important: This article is intended as general guidance only and does not replace project-specific specification, manufacturer instructions, or professional advice where required.
