Thermally Broken Lintels

Catnic’s latest innovation is the biggest shake up in steel lintel design for a generation. An elegant, simplistic design derived from extensive research and rigorous development testing, offering a sophisticated, practical solution to the latest changes in Building Regulations. TBL is a patent pending range providing the most thermally efficient steel lintel solution on the market.

TBL Diagram
  • 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

This unique design enables a complete thermal break between the inner and outer leaf of the cavity wall construction, results in outstanding thermal performance values of:

Psi value 0.02 to 0.05 W/mK

Independently verified by the Building Research Establishment. See for further details and certification.