Builders Merchants Journal – BMJ Publishing to Builders Merchants and the UK merchanting industry for more than 95 years
Lintel brand IG Lintels has a new BBA certified Hi-Therm lintel, which offers a thermal performance that is up to five times more efficient than a conventional cavity wall steel alternative.
The new lintel, approved by the British Board of Agrement (BBA), has an extremely low thermal conductivity performance which contributes towards a Psi value of 0.05 W/m·K.
Using the Hi-Therm lintel within housing projects can also provide a low cost sustainable solution to CO2 reduction, creating a 3-5% improvement over accredited values on a dwelling emission rate calculation within SAP whilst eliminating the need for a damp-proof course.
The Hi-Therm lintel generates up to a 34% reduction in total non-repeating thermal bridging and future proof performance in line with predicted requirements for part L set for 2013. These forthcoming changes to building regulation have made the need to limit thermal bridging a high priority for architects, designers and SAP assessors. While conventional steel lintels cause thermal bridging in cavity wall installations, IG’s Hi-Therm lintel virtually eliminates this problem.
The lintel uses a unique combination of glass reinforced polymer and galvanised steel to create a lintel whose thermal characteristics outperform all other lintels, while delivering greater corrosion resistance than stainless steel, supporting loads equal to that of a standard or heavy duty lintel and removing the need for the insertion of a DPC.
