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Technical - Frequently Asked Questions

D1. What is Pilkington Optiwhite™?

D2. What is different about Pilkington Optiwhite™ glass?

D3. Is Pilkington Optiwhite™ more difficult to toughen than Pilkington Optifloat™?

D4. Can you use leading on Pilkington Optiwhite™?

D5. Can I substitute Pilkington Optitherm™ S4 for Pilkington K Glass™?

D6. Is Pilkington energikare™ applicable to aluminium and timber framed as well as PVC framed windows?

D7. Are Pilkington energikare™ units compatible with internal Georgian Bars, applied leads and/or applied bevels? 

D8. What about sealant compatibility?

D9. Should Pilkington energikare™ IGUs be supplied with edge taping?

D10. Is Pilkington energikare™ suitable for use in conservatories?

D11. How do I achieve solar control with Pilkington energiKare™?

D12. What would be the saving in heat loss for a North facing window?

D13. Is Pilkington energiKare™ suitable for commercial buildings?

D14. Is Pilkington energiKare™ suitable for public buildings such as schools? 

D15. What is Pilkington Spacia™? 

 

D1. What is Pilkington Optiwhite™?

It is a glass made with higher quality raw materials virtually free of the normal levels of iron impurity.  With the removal of iron comes a higher light transmission, higher solar heat transmission (solar gain) and a glass with almost no slight green tint on the edges.  Manufacture of Pilkington Optiwhite™ is at a higher cost than normal float glass due to:

  • Increased furnace build costs
  • Slightly lower furnace output during  manufacture
  • Higher cost raw materials
  • Raw materials processing

 

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D2. What is different about Pilkington Optiwhite™ glass?

Purer raw materials and modified furnace process conditions are required to produce Pilkington Optiwhite™ resulting in a clearer, more colour neutral glass. When used in Pilkington energiKare™, higher levels of light and solar heat transmission are achieved enabling the home to benefit from free heat from the sun.

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D3. Is Pilkington Optiwhite™ more difficult to toughen than Pilkington Optifloat™?

No. Thermal toughening has no detrimental effect on Pilkington Optiwhite™ product and it is as easy to toughen as standard clear float glass but may require slight adjustments to settings to achieve optimal product and process performance.

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D4. Can you use leading on Pilkington Optiwhite™?

Yes it can be treated in exactly the same way as Pilkington Optifloat™ and the same is true for other applied items and Georgian bar.

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D5. Can I substitute Pilkington Optitherm™ S4 for Pilkington K Glass™?

No.

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D6. Is Pilkington energikare™ applicable to aluminium and timber framed as well as PVC framed windows?

Yes.  The performance may differ for the various types and designs of frame as well as frame materials. The minimum performance requirement is that the complete window achieves WER band C. 

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D7. Are Pilkington energikare™ units compatible with internal Georgian Bars, applied leads and/or applied bevels?

Yes.

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D8. What about sealant compatibility?

No special or additional considerations are required. Fully compatible as per standard IGUs.

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D9. Should Pilkington energikare™ IGUs be supplied with edge taping?

No.

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D10. Is Pilkington energikare™ suitable for use in conservatories?

It is ideal for North-facing conservatories, the verticals could be glazed with Pilkington energiKare™ for additional warmth. However, for South-facing conservatories and roof-glazing applications we would recommend the use of solar control products such as Pilkington Activ™ Blue instead.

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D11. How do I achieve solar control with Pilkington energiKare™?

You can’t. If you want solar control for south facing windows or conservatories you should use appropriate products such as Pilkington Eclipse Advantage™, Pilkington Activ™ Blue or Pilkington Activ™ Neutral.

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D12. What would be the saving in heat loss for a North facing window?

Calculations are based on average so North would be slightly worse and South facing would be slightly better.  

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D13. Is Pilkington energiKare™ suitable for commercial buildings?

Only those commercial building which are domestic in nature such as blocks of apartments, student accommodation, homes for the elderly and so on. Contact us to see if any further examples would be eligible.

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D14. Is Pilkington energiKare™ suitable for public buildings such as schools?

No, schools do not constitute domestic dwelling hence are outside of the BFRC scheme.  Given the high levels of day time occupancy and often sizeable glazed areas, it may be more appropriate  to utilise some solar control glazing instead of Pilkington energiKare™  in schools.

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D15. What is Pilkington Spacia™?

It is our unique vacuum glazing, developed by NSG in Japan and used in installations there for over 10 years. We have launched this product in the UK & Ireland within the Pilkington energiKare™ family of products branded Pilkington energiKare™ Legacy, since we believe it is the ideal solution for energy efficiency in many of the traditional homes in this country. With excellent thermal insulation and a very slim profile Pilkington energiKare™ Legacy can preserve the look of timber framed single glazing. For further details visit www.pilkington.co.uk/energikarelegacy .

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