Shutters and R-Values: Compare Energy Efficiency of Window Coverings06/13/2017Bill Burke We’re big talkers when it comes to energy-efficient window treatments. That’s because we have the hard numbers to back us up. With the help of some independent research, we’ve been able to directly compare the energy efficiency of the most common window treatments in Indianapolis, from blinds to drapes to shutters.What Is R-Value And Why Does It Matter For Window Treatments?Everything in your house that contributes to insulation, from the walls to your windows, has an R-value. That value lets you know how good it is at blocking heat from moving through it. A larger r-value indicates a more effective insulator. Why does the R-value of a window covering matter? Basically, a more effective insulator lets you keep your home at your preferred temperature. No matter if you want to keep in the heat at wintertime or keep the heat out in summer, you need good insulation. That’s especially necessary for your windows, as they’re one of the most common areas of heat loss throughout the whole house.Window Treatment R-value Comparison ChartEvery window treatment is not made equal, at least not in insulation. Though there can be some variation due to the material and build between different companies and makes, here’s what you’re likely to find when comparing window coverings.Type of Window TreatmentAverage R-ValueNo window treatment0.75-1Mini blinds1.5-2Shades2.5Draperies2-3Wood Shutters3-4Honeycomb shades4.5Polywood plantation shutters>6R-values from Energy.gov and HouseLogic.A short look at the table tells you a number of things. Perhaps the first thing you notice is the fact that some window treatments barely give you any benefit whatsoever (ahem, blinds), whereas others are energy-efficient beasts. That big gap in R-value might mean a difference of several degrees – enough to make an impact in whether you dial up your AC and waste money.The second is that the material of your window treatment makes a big difference. Honeycomb shades, which are made with several engineered layers designed to trap heat, can block energy flow a lot more effectively than pleated shades. Likewise, Polywood® plantation shutters, built from a completely solid faux wood polymer, can repel heat a to a much greater degree than natural wood shutters. Natural wood can be permeable, with natural knots and gaps that let heat move easily. Polywood shutters, outfitted with strict weatherstripping, make a solid seal on your window when shut, giving them that best in class r-value of 6 or more.Up Your Home’s R-valueThe science doesn’t lie. Your window treatments play a big role in how comfortable your house can be. Ever feel like your house could stand to be a bit cozier? We’ll help. Have a chat with the team at Sunburst Shutters Indianapolis by calling 317-558-9066, or use our free appointment request form below.