Patent Glazing & Roof Lights Quotes
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

Safety


Patent Glazing has proven to have an excellent safety record. However, it is important to ensure you specify the correct glass type in relation to the overall height of the glazing above the floor level. The following recommendations apply:-

Glazing Height above floor level Suitable types for Single Glazing Suitable types for Double Glazing
Upto 5 Metres Toughened, Laminated or Wired Glass

The inner pane must be Toughened or Laminated. The upper pane should be Toughened in either instance.

5 to 13 Metres Toughened glass not more than 6mm thick
and panes not larger than 3sq/m.
Laminated or Wired Glass

The inner pane must be Toughened or Laminated. The upper pane should Toughened in either instance.

Above 13 Metres Laminated or Wired Glass

The lower pane must be Laminated


From time to time, it is desirable to use Wired Glass in double glazed combinations. However, there is a high risk of breakage due to thermal stress and advice should be sort from the sealed unit manufacturer.

We do not recommend the use of Toughened Glass in single glazing or to the inner pane of double glazed units over swimming pools, food & beverage preparation units or any areas where the small broken pieces characteristic to this glass type, could cause subsequent injury due to contamination. In these situations laminated glass or polycarbonate are preferable.
 
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