Bifold Door Lintels

Choosing the Right Lintel for Bifold Doors

Bifold door openings are usually wider than standard doorways, which means the lintel must support a greater span and often higher loads from masonry, floors, or roof structures above. In most cases, heavier-duty lintels are required, particularly for external cavity walls.

The correct lintel will depend on the width of the opening, the wall construction, and the loads being carried. For modern builds and extensions, steel cavity lintels are commonly used as they can support both leaves of masonry while maintaining structural performance.

Heavy Duty and Extra Heavy Duty Lintels

For wider openings such as bifold and patio doors, heavy-duty or extra heavy-duty lintels are typically specified. These are designed to handle increased loads and longer spans compared to standard lintels, making them suitable for most domestic extension projects.

Many bifold door installations will require lintels from higher load categories, particularly where roof loads or floor joists are supported above the opening.

Typical Applications

Lintels in this collection are commonly used for:

• Bifold door openings
• Patio and sliding door installations
• Rear extensions and open-plan renovations
• Wide structural openings in loadbearing walls

Wall Types and Lintel Selection

Most external bifold door openings are constructed within cavity walls, meaning a cavity lintel is typically required to support both the inner and outer leaf. You can view our full range of cavity lintels for more options.

In solid wall construction, steel or concrete lintels may be used depending on the span and loading requirements. Browse our solid wall lintels for suitable alternatives.

Span and Bearing Considerations

The length of the lintel must always exceed the structural opening to allow for adequate bearing at each end. For wider openings, increased bearing is often required to safely distribute loads into the surrounding masonry.

As a general guide, larger bifold openings will require longer lintels with higher load ratings. Always ensure that the selected lintel meets the structural requirements of the project.

Further Guidance

If you are comparing different opening types, you can also explore our window lintels and door lintels collections.

For more detailed advice on lintel types, applications, and sizing, visit our Lintel Info Hub or read our bifold door lintel guide.