Catnic Lintels

Which Catnic Lintel Do I Need?

Catnic manufacture a wide range of steel lintels designed for different wall constructions, loading requirements, and thermal performance needs. Choosing the correct lintel depends on the wall type, cavity size, structural loading, and whether thermal bridging needs to be reduced.

Standard Cavity Wall Construction
CG Cavity Wall Lintels

General residential cavity wall openings.

Thermally Efficient Cavity Walls
TS Thermally Broken Lintels

Designed to reduce thermal bridging around openings.

100mm Internal Walls
BSD Box Lintels

Suitable for internal masonry wall openings.

Single Leaf Wall Construction
ANG Single Leaf Lintels

Used for outer leaf support in timber frame and steel frame construction.

Heavy Duty or Solid Wall Applications
CN / Heavy Duty Lintels

Suitable for larger spans and higher structural loads.

If you're unsure which lintel is suitable for your project, always refer to the manufacturer's load tables and structural requirements before ordering.

Common Features of Catnic Lintels

• Manufactured from hot dip galvanised steel
• Selected ranges include Duplex Corrosion Protection for additional durability
• Options available for cavity walls, solid walls, internal walls, and single leaf construction
• Insulated and thermally broken lintel options available
• Manufactured in accordance with EN 845-2 standards
• BBA certified ranges available

Popular Catnic Lintel Sizes

Catnic lintels are available in a wide range of standard lengths to suit typical residential and commercial openings.

Small Window Openings
900mm - 1200mm lintels commonly used for smaller residential windows.

Standard Doors and Windows
1500mm - 1800mm lintels suitable for many standard openings.

Wide Openings and Larger Spans
2100mm and above for larger structural openings and wider spans.

Always allow for the required end bearing and loading conditions when selecting a lintel size.

Thermal Performance

Modern building regulations place increasing importance on reducing thermal bridging around window and door openings. Catnic offers both insulated and thermally broken lintels designed to improve thermal efficiency within cavity wall construction.

Thermally broken Catnic TS lintels are specifically designed with a complete thermal break between the inner and outer steel sections, helping reduce heat transfer through the wall structure while maintaining structural performance.

Insulated cavity wall lintels are also available across various Catnic ranges to support compliance with current Part L thermal performance requirements.

For more information on selecting the correct lintel type, cavity wall construction, and installation guidance, see our Complete Guide to Lintels in the UK or read our Catnic lintel installation guide.