Thermally Broken Lintels FAQs

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    How to select a lintel

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    How to install a Cavity Wall lintel

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    How to install a Thermally Broken lintel

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Why do I need a Thermally Broken Lintel?

Using a Thermally Broken Lintel can help you meet the requirements of Part L of the Building Regulations in a simple, cost effective, sustainable way.

What are the psi values for Catnic’s TBL?

The psi value relates to actual window head detail and can be influenced by the window position, block type, insulation type, cavity size and obviously lintel. Catnic’s Thermally Broken Lintels (standard duty to extra heavy duty) have been thermally modelled in a range of different wall constructions and achieve psi values of 0.02 to 0.05 W/mK.

Will the lintel allow me to comply with Appendix R of SAP 2012?

To comply Appendix R the lintel detail must have a psi value of no more than 0.05 W/mK. All of Catnic’s Thermally Broken Lintels will achieve this.

Does it require a separate DPC?

A separate DPC is required but the profile of the lintel has been specifically designed to provide the perfect shape for a DPC to be trayed over the lintel, resulting in very easy installation with a very simple, thermally efficient junction between the lintel and the cavity wall insulation.

What are the lead times for delivery?

Standard lead-time is currently 25-30 working days.

How is the product priced?

Catnic TBLs are list priced. Please speak to your local Catnic Area Sales Manager to determine your discounts.

Are the lintels powder coated?

Yes the inner and outter leaf of the lintel are galvanised and then powder coated.

What range is available?

There are TBLs available to suit standard, heavy & extra heavy duty applications and for cavities from 90 to 165 mm.

How does the TBL compare structurally with Catnic’s existing range?

To allow easy conversion, the TBL has the same safe working loads as the existing Catnic CG, CH and CX cavity wall lintels.

Do I need to prop the TBL during construction?

No, due to its inherent stability and strength you do not need to prop the TBL during construction.

Is the lintel fire rated?

The core of the lintel contains a fire retardant and the steel elements can be clad with plasterboard in exactly the same way as Catnic’s existing lintels, providing the necessary fire rating.

Does the TBL have 3rd Party Approval?

All Structural Testing was carried out independently by the University of South Wales following EN845-2 & EN846-9. The University of South Wales is a Notified Testing Laboratory for the Testing of Lintels as required by the Construction Products Directive.

Thermal modelling was carried out by the Building Research Establishment (BRE).

The TBL is currently going through BBA Approval.

Is the TBL CE Marked?

Yes the TBL range is CE Marked in line with EN 845-2.

Can it be used in coastal sites?

The TBL can be used in coastal sites following the same recommendations as required for our standard lintels. i.e. use a separate DPC with stop ends over the lintel in conjunction Catnic’s soffit cladding.

Can soffit cladding be used with TBL?

Yes standard soffit cladding can be used with TBL.

Can arch centres be used with TBL?

Yes arch centres can be used with TBL.

Does the product require any special handling?

Due to its robust design the TBL can be handled and stored in the same way as existing Catnic Lintels.