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Windows FAQ

FAQS ABOUT WINDOWS FROM ST. LOUIS HOMEOWNERS

Renewal by Andersen has put together this list of frequently asked questions about replacement windows in order to keep homeowners better informed. If you have any further questions, please don’t hesitate to called Renewal by Andersen of St. Louis for replacement window facts and information.

What is a replacement window?

A true replacement window is a window that’s custom built to fit within the opening of an existing window. It’s built to fit precisely and can be installed without disturbing the interior and exterior areas around the window.

Why should I replace my home’s windows?

Window replacement affords a variety of benefits including higher resale value for your home, reduced energy bills, and overall comfort of your home.

What is Low-Emissivity or Low-E Glass?

Low-E Glass is outfitted with a microscopically thin, virtually invisible, metal or metallic oxide layer deposited directly on the surface of one or more of the panes of glass. The Low-E coating reduces the infrared radiation from a warm pane of glass to a cooler pane, thereby lowering the U-factor of the window.

What is Fibrex?

Fibrex is a sustainable composite material that combines the strength and durability of wood with the easy maintenance of vinyl. For further information, visit our Advantages of Fibrex page.

How much money can I expect to save on my heating and cooling bills?

The amount of money you will save on your heating and cooling bills is relative to the type of window you currently have installed, but by replacing your windows, you can expect to save up to 40% on your energy costs.

For more information on saving money on your energy bills, please visit our Energy Efficiency page.

What type of warranty comes with the windows?

All of our replacement windows come with a manufacturer’s limited lifetime warranty. This warranty is transferable should you sell your home. For more information, visit our Window Warranties page.

What types of Payment methods & Financing do you offer?

We offer a variety of payment methods and financing options depending on promotional period. For more information, visit our Financing Options page.

FREE Estimate in St. Louis on Windows

If you live in or around St. Louis, you have only one choice for the highest quality doors and windows- Renewal by Andersen of St. Louis. Give us a call today at (314) 310-3636 to start on the path towards a brighter, more valuable home.

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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