Thermally Broken Heavy Duty Lintels | 100mm Cavity

The Catnic Thermally Broken Lintel, or TBL, is a type of thermally broken steel lintel for use in masonry cavity wall build-ups. It provides support over structural openings such as doors and windows, while minimising linear thermal bridging heat loss compared to conventional cavity lintels.

Offering a sophisticated, practical solution to the latest changes in Building Regulations, Catnic’s patent pending TBL range is the most thermally efficient steel lintel solution on the market.

Utilising the strength of steel combined with the thermal insulating properties of a high-density, fire retardant core, it’s design provides the thermal performance of separate lintels, whilst offering users the same stable installations benefits of a traditional cavity wall lintel, providing: 

• Industry leading linear thermal transmittance Psi values of 0.02 to 0.05 W/mK 
• Safe working loads in line with Catnic’s existing Cavity wall lintels 
• Manufactured from powder coated galvanised steel 
• Options are available to suit cavities from 90 to 165mm, in standard, heavy and extra heavy duty performance categories 

Achieving this remarkably low Psi value ensures Catnic’s TBL range will always meet the performance criteria requirements of Appendix R found in SAP 2012 providing easy compliance with Part L of the Building Regulations. To limit the risk of surface condensation or mould growth the temperature factor for a detail used in the external wall of a dwelling must be greater than 0.75. Catnic Thermally Broken Lintels a have temperature factor of at least 0.95.