Lonsdale 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 typical installation details.
click here for section profiles and typical installation details.

click here for Specification

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

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.