Lightspan Materials and General Overview
  Drawing Download

  One of the most recent additions to the Duplus product range is the innovative Lightspan Skylight. Combining all the benefits of the Lightspan Curtain walling/roofglazing system with a polyamide thermally broken edge detail, this new product offers quicker delivery times and a lower cost per metre squared.  
  Fully Draining -  Lightspan’s overlapping drainage design means that should water penetrate past the outer gasket it will be channelled through the system and dispersed at the system’s lowest point.  
  Air Permeability - As standard, the internal gaskets to our Lightspan Skylight come as a complete ‘tyre’ that wraps around the glass. The alternative, ‘traditional approach’ adopted by most of our competitors, of butt jointing internal gaskets can lead to gaps between gaskets. Often gaskets are stretched into position and after being cut, shrink back leaving an unsightly gap at the corners. This gap ultimately leads to increased airflow between the inside and the outside of the building meaning the product and subsequently the building has the potential for failing an air test. Our internal tyre gaskets, purpose made for each opening totally eradicate this.  
  Thermal Efficiency –The Lightspan Skylight takes the aesthetic and structural benefits of aluminium and combines them with the thermal efficiency of PVC and TPE. In principle, we ‘house’ both sides of the glazing in thermally efficient materials – co-extruded PVC pressure plate outside, co-extruded PVC thermal break beneath protecting the glass seals and large TPE gaskets internally. The external cover cap and the internal structural members are manufactured from aluminium. The aluminium screw port
  within these members is set back behind the internal glazing face to maximise the efficiency of the thermal ‘housing’. When you consider that aluminium, a very good conductor of heat, has a thermal conductivity of 160W(m-K) whereas PVC has a thermal conductivity of 0.17W(m-K) you can probably understand why we have adopted this approach particularly in light of the Governments drive to improve the thermal performance of new buildings. Duplus can offer thermal calculations for individual projects based on results obtained via BISCO Building Physics Software.  
  Slope - We recommend a minimum fall of 50mm to each pane of glass contained within our roofglazing products. The weight of the external pane of glass causes a dishing of the glass at the centre of the pane this can lead to water ponding and ultimately this leads to unsightly algae growth, the higher the fall the less chance there is of this phenomenon occurring.  
For more detail please email us:  Estimating   I   Sales
  370 Melton Road,
Leicester LE4 7SL
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