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U-values
       
       
       
  U-value Description  
       
  0.045 Celcon standard blocks used as infill in suspended beam and block ground floors  
       
  0.16 House roof with insulation between joists  
       
  0.25 Cold pitched roof with insulation between ceiling joists (vapour barrier to warm side if not ventilated)  
       
  0.35 External wall  
       
  0.44 House built during 1975-81 with cavity wall insulation fitted  
       
  1.0 House built during 1975-81  
       
  1.98 System build construction prior to 1966  
       
  2.2 One brick thick wall  
       
  2.8 Double glazing (wood frames and 12mm air gap between panes)  
       
  4.8 Single glazed wooden window  
       
       
       
       
       
       
 

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