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Quick Guide to Products
Which system to use?

Unheated Spaces, canopies, station and platform glazing SkyGard should be your first choice if using 6 to 7mm thick glass. If considering different glass thickness, then PlasGard would be your next choice

Heated Spaces
ThermGard is our thermally broken system providing excellent Uvalues and air-tightness when combined with insulating double glazed units for compliance with Building Regulations Part L.

Self-supporting Lanterns or SkyLights
SpanGard self-supporting rooflights feature extruded cill, ridge & hip members to provide you with a complete kit pre-fabricated upto 6m wide by infinite length without the need for additional support, other than a load-bearing curb.

If using Polycarbonate
PlasGard offers a range of glazing bars & accessories for use with ‘plastic’ glazing materials for unheated spaces. If you require a thermally broken system, then please see our ThermGard ALM500 Series

Rafter Glazing
If fitting glazing bars on top of continuous timber rafters, then section reference ALM100/WF suitable for single or double glazing from our ThermGard range, provides neat, low-profile appearance combined with excellent weather tightness and low-maintenance.

Need ventilation?
GlazaTherm roof vents can be incorporated in sloped glazing and fitted with manual, electric or smoke actuators. Alternatively we can provide casement vents in the upstands of lantern lights when required.
Consult the experts
Tel: +44(0)208 801 4221
Email: info@lonsdalemetal.co.uk
ThermGard Glazing Bars
SkyGard Glazing Bars
PlasGard Glazing Bars
ThermGard Glazing Bars
SpanGard Lanterns & Skylights
GlazaTherm Ventilators
Solar Panels

ThermGard Glazing Bars


ThermGard provides amongst the best thermal performance currently on the market. A neat box bar design, ThermGard provides a cost-effective alternative to more expensive sloped curtain walling systems without sacrificing aesthetics. Various box rafters are available to suit small or large spans. Alternatively the carrier rail may be mounted on top of continuous timber rafters (see here for typical hardwood conservatory details [1] [2]). The standard profiles offer a contemporary, minimalist appearance or Heritage profiles are also available for period buildings.

"ThermGard has proved an excellent choice for several projects"Stuart Wood, Ingleton Wood Architects

  • Superior Uvalues can be achieved
  • Excellent air-tightness performance
  • Unique ventilated box-rafter minimises risk of condensation
  • Contemporary or Heritage profiles available


  • Click here for Fastrack CAD Download typical installation details.

    Click here for section profiles and typical installation details.

    Click here for Specification

    Span Table
    ThermGard maximum recommend spans between top and bottom fixings based on 600mm glazing bar centres for roof and vertical glazing.

    Section Single Glazing (mm) Double Glazing (mm)
    ALM 100/1 3000 1900
    ALM 100/2 3800 2900
    ALM 100/3 4400 3600
    ALM 100/4 5000 4000
    ALM 100/5 5500 4500
    ALM 100/H6 3000 1900
    ALM 100/H7 4200 3450
    ALM 100/H8 5000 4000

    Please note the above table is for guidance only, for although the glazing bars can be used in compliance with the requirements of BS5516 ThermGard maximum recommend spans may not always comply. If in doubt please contact our Technical Department. A more detailed table is published in the LMC Design guide.

    Glazing Width = Glazing Bar c/c minus 13mm or minus 15mm if using thermal barrier.

    ThermGard is a tried and tested product installed throughout the UK. Some notable projects include The British Museum, Windsor Royal Opera House, ILVA stores, the US Ambassador’s Residence and McArthur Glenn Outlet Village, Bridgnorth.
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    Literarure Request Contact Us
    Fastrack CAD Download

    Click Here to get your free copy of our Guide to Uvalues & Glass Specification. This informative guide will show you the  various Uvalues that can be achieved with various glass specifications. Solar Heat Gain a problem? We'll show you how to reduce glare  and heat build up by using some of the latest solar control glasses. Confused  about what type of double glazing to specify? The guide simplifies the subject of Uvalues and gives you a choice of specifications you can rely on to comply  with Building Regulations. 

     

     

    Video