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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
Bomb-blast Mitigation
Safety Condensation
Glass Types Fire
Glazing Bar Centres Cleaning & Maintenance
Glazing Bar Spans CDM Non-Fragility
Structural Considerations Energy & Environment
Structural Tolerances Design Life Durability
Marine Environment  

Glazing Bar Spans


Lonsdale provide a wide range of systems suitable for both single and double glazing. Generally, glazing bars are available up to maximum spans of 4 Metres for double glazing and 5 Metres for single glazing.

Sometimes these spans can be increased subject to the design wind, snow and dead loads. Glass manufacturing and handling limitations means that single panes or double glazed units may require to be joined using cames as per details below:-



Alternatively, where long down slope dimensions are required, the glazing can be built up in a series of tiers subject to the glazing bar profiles maximum span capabilities thus:-



Please refer to our Product Pages where tables showing the relevant glazing bar spans for our various systems can be viewed. These are for guidance only, please refer to Technical Support for advice. Lonsdale also offer several glazing bars suitable for fixing on top of timber or steel rafters.
 
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