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WINDOW ANATOMY: KEY COMPONENTS YOU NEED TO KNOW

Having basic underst anding of the window’s anatomy is key to choosing energy-efficient and lasting products. After all, every part contributes to the performance and longevity of the whole.

Window Anatomy Key Components You Need To Know

Without getting too technical, Renewal by Andersen® of St. Louis wants to shed light on the fundamental components of double-pane windows:

Glass

The glass is the chief reason energy efficient windows save energy. With the right type of glazing, the window could block heat, thermally insulate, and admit natural light.

Of all the technologies out there, we chose to use spectrally selective, low-emissivity coatings to reflect the undesirable portions of the solar spectrum. To put things into perspective, our Low-E4® SmartSun™ glass deflects 72% and 95% of infrared and ultraviolet rays, respectively, while catching 65% of sunshine.

Frame

The framing material defines the window’s ability to stay weathertight and remain in mint condition for a long period. Wood and vinyl are two of the most popular choices, but they have undisputed downsides. The former is prone to decay while the latter can’t preserve its structural integrity with changes in temperature.

This is why our very own Fibrex® is a superior alternative to wood and vinyl in window installation. This composite material naturally expels moisture and doesn’t bow or crack with time. As a result, it retains its airtight seal and flawless beauty as it ages.

Gas Fill

Double-pane windows contain an insulating gas to help reduce thermal transfer and minimize the chances of condensation. Compared with krypton, argon offers the better trade-off between energy efficiency and affordability.

Our double-hung, picture, sliding, bay, bow, and casement windows combine the power of our Low-E4 glass and argon gas. Together, our custom units act as an effective barrier against the heat and cold.

Learn more about the parts of Renewal by Andersen of St. Louis windows. To talk about your Missouri project, call us today at (314) 310-3636 for your FREE, in-home consultation in St. Charles, MO.

Reviews

"Have nothing but great things to say about the window installation done today by John Hutchinson with Renewal by Andersen! He was friendly, personable and professional and did a great job installing. He did a great job of putting down roller pads and tarps with next to zero clean up. Would highly recommend them for any window replacement needed!"

Mark V.
Jun 26, 2025

"We had our new Renewal by Andersen windows installed on June 5th & 6th, 2025 and we LOVE them! The quality, beauty, and functionality are best-in-class! The whole experience from dinner presentation at Lazy River Grill, the initial in-home sales consultation and measurement, the regular communications from the salesman and concierge, and the installation team’s professionalism and skills made the process so seamless. This is the second home we have opted for Renewal windows and doors and have been delighted both times! Thank you Renewal by Andersen STL! "

Jeff C.
Jun 7, 2025

"I had an excellent experience with RbA STL. Our designer, Courtney, was great and the finished product is awesome. The installation was easy and the gentlemen left our home cleaner than they found it upon entering. I would recommend RbA STL - you’ll get tired from their constant contacts, and that’s a GOOD thing!"

Jeramy D
Jun 3, 2025

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