Quote:
Originally Posted by dichotomous
that window is a hole in the wall thermally. I dont care if you have the new super awsome R-5 windows or even R-10 windows which I'd sure like to see! a 2x4 wall has an R value of 19, a 2x6 wall with layer of foamboard on the outside as well is better than R-30. the roof should be R-50 or more. so that 0-8 R rating on the window, is a thermal hole.
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This has gotten me into thinking. If one were to design a window, double or triple-paned, with a vacuum between the panes, would this result in a satisfactory increase in the R value?
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