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Tag Archives: IG Lintels

  • IG Unveils New Lintel Solution To Thermal Bridging

    IG Cavity Wall Hi-Therm Lintels IG Cavity Wall Hi-Therm Lintels

    IG Lintels has revealed details of its new Hi-Therm lintel which offers a thermal performance that is up to five times more efficient than a conventional cavity wall steel alternative. This impressive new lintel has a very low thermal conductivity which gives a Psi value of 0.06 W/m•K, and will contribute to a 3-5% saving on SAP calculations.

    Recent changes to the building regulations have combined with those planned for the near future to make the need to limit thermal bridging a high priority for house builders, architects and SAP assessors. While conventional steel lintels cause thermal bridging in cavity wall installations, IG’s new Hi-Therm lintel virtually eliminates this problem.

    The secret lies in using a unique combination of glass reinforced plastic and galvanised steel to create a lintel whose thermal characteristics outperform all other lintels, and which delivers greater corrosion resistance than even stainless steel, supports loads equal to that of a standard or heavy duty lintel and does not require the insertion of a DPC.

    The Hi-Therm lintel bonds the internal and external walls together by spanning the intervening gap and also contributes towards the achievement of the Fabric Energy Efficiency (FEE) standards required by the Code for Sustainable Homes. It can be manufactured to suit different cavity widths, making it ideal for a wide range of different building types.

    Contractors often use large cavities on new buildings in order to meet building regulations. Not only is this unnecessary, but it also adds quite considerably to the build costs. A traditional construction with a thermal block on the internal leaf, a 100mm well insulated cavity and the IG Hi-Therm lintel can create SAP savings of up to 5% and so meet building regulation requirements without the unnecessary expense of using a wider cavity

    Additional notes:

    • Changes to the building regulations part L1A 2010 were intended to improve the thermal performance of the building envelope, by making it more energy efficient, reducing heat loss and so cutting carbon emissions by 25% more than previously required. In 2013, new building regulation will be introduced which will require another 44% reduction in carbon emissions over the 2010 regulations.
    • The Standard Assessment Procedure (SAP) is used to assess the energy performance of dwellings and thereby helps deliver many of Government’s objectives. SAP is used as the vehicle for demonstrating compliance with the relevant building regulations.
    • IG has invested in specialist thermal modelling software which is used to calculate Psi values on proposed design solutions. The company combines this with its own in-house expertise to provide thermal modelling services for architects, designers, house builders and SAP assessors.

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