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R5 triple pane windows & patio doors


R5 insulation rating=U-vlaue .20



R5 is Eco-Friendly Energy Efficiency


Common Energy Star windows and patio doors only have an R rating of 3.  This series has a R rating of 5 for the ultimate in energy efficiency.


How Much Difference Does an Energy Efficient Window Make?


Heat and cold transfer throught windows causes approximately 30% of heating and cooling energy costs nationally.  That is an annual of 4.31 quadrillion BTU of energy consumption.


R5 = U-Value .20


U-value is the rate of heat flow through a window; the lower the value, the better the insulating quality.  Most commonly the U-value is used to measure a window's total insulating value.  R-value is the resistance of a material to heat flow; the higher this number, the better the insulating value.




  • Reduced heat loss in the winter, better than typical Energy Star or Low-E windows

  • Potential for significant reduction in energy costs

  • Moderate to significant reduction in noise levels compared to double pane windows




  • Triple-Glazed:  the insulated glass unit on a R5 window has three panes of glass

  • Krypton Gas filled between the panes (Krypton has significantly better insulating qualities than Argon)

  • Double Low-E glass:  Low-E is on the exterior pane and the interior pane


Milwaukee Windows and Patio Doors with the R5 Upgrade


Platinum Series

Powerweld Series

Renaissance Series

Patio Doors (Vinyl)


* not available on Rezilience series





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