The low cost solution to reduced carbon
emissions & improved Fabric Energy Efficiency


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Product Range

Please choose which type of Hi-therm Lintel loading table you would like to view.

Thermal Efficiency

Hi-therm is the only one piece lintel which achieves the Appendix R value for steel lintels in Part L 2013. Up to 5 times more thermally efficient than a steel cavity wall lintel.

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Cost Effective

Low cost alternative to stainless steel – NHBC approved for use in coastal areas. A low cost route to improved Fabric Energy Efficiency. A low cost sustainable solution to CO2 reduction within SAP.

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Better Buildability – offers the simplicity of a one piece lintel solution which achieves these significant advantages through traditional building practices, unlike a two part lintel solution.

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Cost Comparison

Comparison of the different solutions to reduce carbon emissions.
This case study is based on an actual semi detached 75m2, 3 bedroom house design and the figures were produced by an independent energy assessor using SAP 2009 software.

Cost comparison to Improve Fabric Energy Efficiency by 1kWh/m2/year

Better Buildability

Maintenance free – No maintenance required unlike other sustainable technologies.
No DPC required up to areas classified as very severe by NHBC.

Split lintels – in some cases split lintels may be offered as a means of enhancing thermal performance however they are in no way comparable in terms of efficiency or buildability to the Hi-therm sustainability lintel.


  • No DPC required *
  • Hi-therm closes the cavity
  • The single component design simplifies installation
  • The one piece design assists stability between the internal and external leaves and creates stability during the build process
  • Top insulation integrates well with cavity wall insulation for optimum performance

Split Lintel

  • An additional DPC is required on all installations and requires skilled positioning
  • A cavity closer must be supplied and fitted
  • Requires two separate lintels with double the handling and installation labour
  • Individual lintels will require propping and additional wall ties will be required to overcome the lack of inherent stability in a split lintel solution
  • Creates a difficult to insulate cavity requiring a complex solution to achieve continuous insulation

New Barratt Homes

Sites throughout the UK.

Specifying Hi-therm significantly reduced thermal bridging on all house types.

“When the government unveiled its changes to Part L 2013 building regulations Barratts analysed a range of sustainable solutions in order to comply with the mandatory minimum fabric performance standard (Target Fabric Energy Efficiency, TFEE). The Hi-therm lintel has proved to offer a cost effective option as part of a suite of specification upgrades.”

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