Keystone's award-winning lintels are an innovative solution to improving SAP calculations, meeting Part L regulations and reducing thermal bridging by up to 80 per cent
The award winning Hi-therm+ lintel from Keystone provides a low-cost solution for reduced carbon emissions. It is up to five times more thermally efficient than a standard steel lintel.
Openings for windows and doors are vulnerable to heat loss through thermal bridging so the performance of structural elements such as lintels that are installed in these junctions is important.
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 per cent of the total heat loss through thermal bridging.
Keystone’s patented Hi-therm+ lintel with its enhanced Psi-value offers specifiers an excellent solution. The innovative design 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.
Using Hi-therm+ lintels in place of standard steel versions can lead to an 80 per cent 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.
Keystone's Hi-therm+ lintel is BBA certified and won the Best Building Fabric Product Category at the Housebuilder Product Awards in 2018.
For more information and technical support, visit keystonelintels.com/hi-therm