And "Just what is R-factor?" you might ask. R-factor or R-value is the measurement of a product's ability to resist heat flow. Since today's homes typically have R-values of up to 25 in the walls and only 3.5 in the low-e double glazed glass, the windows become an energy sieve losing energy to the outside in winter and gaining energy in summer. So now we may have this consideration when choosing a window treatment. The best class of window treatments for R-factors is the honeycomb shade, also known as the cellular shade.
It is important to note that all window treatments have some R-factor and it is worth weighing all their features when making a decision about a window treatment.
-Paul
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