Condensation - Patent Glazing, 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.

Condensation

Condensation occurs when the surface temperature is below the dew point in the atmosphere. Designers should be aware that wherever the patent glazing system is at a lower temperature than the surrounding atmosphere and there is sufficient humidity, condensation is likely to occur. External factors such as frost, cold rain and low air temperature will increase the risk of condensation and similarly internal conditions where humidity is increased in kitchens, bathrooms, bedrooms and swimming pools for example, will also run a higher risk of problems from condensation.
Ventilation will help to reduce these problems together with the use of double glazed units with low U values and ThermGard, our thermally broken roof glazing system.