Keystone's efficient and award-winning lintels

Latest News Tue, Sep 3, 2019 1:44 PM

The award winning Hi-therm+ Lintel provides THE low-cost solution for reduced carbon emissions.

Up to 5 times more thermally efficient than a standard steel lintel, the Hi-therm+ Lintel is an innovative solution to reducing thermal bridging, improving SAP calculations and meeting part L regulations.

Openings for windows and doors are vulnerable to heat loss through thermal bridging so it is more important than ever to pay close attention to the performance of structural elements such as lintels which are installed in these junctions. Lintels are, in most cases, the most significant thermal bridges due to the fact that traditional style steel lintels interrupt the line of insulation with a continuous piece of highly conductive steel. This could account for more than 40% of the total heat loss through thermal bridging.

Specifiers now have an excellent solution, thanks to Keystone’s patented Hi-therm+ lintel with its dramatically enhanced Psi value.

The innovative design of the Hi-therm+ Lintel, utilises a rigid polymer thermal insulator as an effective thermal break, but incorporates a steel inner and external leaf so it is installed in exactly the same way as a standard lintel.

The use of this unique Hi-therm+ lintel in place of standard steel lintels can lead to an 80% reduction in thermal bridging through the lintels. By making these large savings on thermal bridging, designers gain the flexibility to trim back on other more expensive options (such as wider cavities) yet still comply with the latest Part L 2013 building regulations.

The Hi-therm+ Lintel has trusted BBA certification and has been crowned winner of the Best Building Fabric Product Category at the prestigious Housebuilder Product Awards.

There is a strong argument that focusing on the fabric of a building is the most cost-effective, reliable and robust method of achieving compliance with future building regulations, as getting the fabric right will save energy throughout the whole life span of the building.

For more information on Hi-therm+ Lintels call Keystone on 01283 200 150 or visit

In association with The Keystone Group

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Company Details

Ballyreagh Industrial Estate
Cadley Hill Industrial Estate
BT80 9DG
United Kingdom
T: 01283 200 150
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