Patent Glazing Regulations - Roof Lights

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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.

Non-fragility and CDM

Specifying rooflights that are non-fragile.

Fitting rooflights designed to project above the plane of the roof and which cannot be walked on (these reduce the risk but they should still be capable of withstanding a person falling onto them).

Rooflights, lanternlights and patent glazing should be classified to ACR[M] 001:2005 Red Book test procedure. Consideration to prEN1873 is also required (using 1200joules energy rating).

Lonsdale systems have been tested by BRE and have been classified Class A and Class B. Details of the tests are available on request

Even non-fragile rooflights are susceptible to damage by impact. They are not usually intended to support foot traffic. Crawling boards must be used – please refer to our Cleaning and Maintenance Manual

It must be stressed that different combinations of bar lengths and centres will produce varying results. Please contact our Technical department for guidance.