It May Be Time to Replace Your Windows: Energy Efficiency

Published August 9th, 2017 by Admin

Brick House with Ivy


(This is part 1 of a 3-part series to know when and why your home may be ready for replacement windows)

Current trends have seen homeowners take a proactive approach to energy efficiency and for good reasons, too. Increasing the efficiency of your home is good for the environment, enhances the quality of life (we’ve all heard “keep the A/C in the house!”), and ultimately, saves money in the long run. If you are in the process of increasing the efficiency of your home, check the windows in your home. If your home contains a drafty window or two, this could be a sign that they need to be replaced (replacement windows can save approx. 30-40% off an energy bill). As windows age, they can warp and bow resulting in a breakdown of the installation materials that protect your home from the elements (After all, without the window, you are left with a big hole in your home. It’s best to cover it with the best material possible.).


What is it about windows that benefit the energy in your home?


Energy Star Logo


According to Energy Star (a program by the EPA to assign certifications to consumer products that meet energy efficient standards), there are 5 factors that windows have that make the home more efficient.


Quality Frame Materials


Kitchen with Large Brown Window


Quality frames are durable, have low maintenance, and most importantly reduce the heat transfer, which improves home insulation. Some common frame materials are fiberglass, vinyl, wood, and composite. They each have their own insulation benefits.


Fiberglass: stable frames that provide superior thermal performance. Can be up to 8x stronger than vinyl

Vinyl: offers good moisture resistance and thermal performance, but expands and contracts.

Wood: insulates the home well with great strength and durability

Composite: consists of vinyl and wood composite (shavings) that offer moisture and decay resistance.


Multiple Panes


Parts of a Window Pane


Many modern windows are switching to a double or triple glass pane. This means that there are two or more panels of glass (with air or gas in the middle). The more panels of glass the window has, the more protection the homeowner has from the elements. This also includes better resistance to impact (for the kids who never listen to their parents and throw the ball around in the house), as well as increased sound insulation (No more feeling like you’re at a live show to your neighbor’s garage band!)


Gas Fills


How Heat Transfers Through Windows


In between the glass panes, some windows are filled with gases such as argon, krypton, and others that offer better insulation than regular air. The gases are odorless, colorless, and non-toxic.


Benefits include:

  • Increased soundproofing

  • Does not corrode window materials as oxygen does

  • Reduces condensation and frost on window

  • Minimizes heat exchange through the window

  • Helps block UV light


Low-E Glass


Low E-Coating Performance Graphic


Low-E glass is a special coating that reflects infrared light and damaging UV light. This means the glass pulls the sun into your home in the winter to help heat it but blocks the sun in the summer to keep your house nice and cool. This UV protection ensures that your interior furnishings and wall art will not become faded and distressed from the sun.


Warm Edge Spacers


Warm Edge Spacer


A spacer ensures that panes of glass stay the correct distance apart. Materials such as non-metallic and metal/non-metal hybrid spacers can be used to increase insulation benefits of the glass pane edges. This ensures heat transfer through the window stays to a minimum.


Thank you for checking out the first part of our 3-part series. Next week we will go into using windows to increase the natural light in your home.


To get more information on energy efficiency in your home, please visit energy star at