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Q&A: DOORS AND ENERGY EFFICIENCY

Energy efficiency refers to the reduced use of energy while maximizing the capacity of a product or service. It is different from energy preservation, where the use of energy is limited or cut off. Essentially, energy efficiency is getting more for less.

There are many energy-efficient doors on the market nowadays. It’s important to know what makes energy-efficient doors different and how they can help you save on energy use and costs in the long run. That’s why it’s better to discuss the matter with professional contractors before starting any home remodeling in St. Louis MO.

Here are some questions homeowners should ask their contractors:

What is the difference between an energy-efficient door and a regular one?
An energy-efficient door regulates temperature and prevents heat loss. During winter, it restricts heat loss so that the house remains warm without overworking the thermostat. In summer, it keeps heat out, lessening your air-conditioning usage.

What is “low-E coating”?
Foremost, “low-E” means “low emissivity.” Low-E coating is a glass coating that significantly reduces heat transfer and reflects heat back into a room.

We at Renewal by Andersen® of St. Louis offer Andersen® patio doors that come with High-Performance™ Low-E4® SmartSun™ glass. Compared with your regular dual-pane glass, it is 70% more energy-efficient in summer and 47% more efficient in winter. It is our most energy-efficient glass option as it blocks an astounding 95% of damaging UV rays!

What is Fibrex®, and how can it protect my home?
Fibrex is an exclusive composite material made of wood fibers and thermoplastic polymer. It combines the stability and strength of wood with the low-maintenance quality of vinyl. Unlike wood and vinyl, however, Fibrex will not pit, rust, warp, or corrode. Andersen doors made with this material are sure to remain sturdy and preserve their form regardless of the weather.

Fibrex also has excellent insulating properties as it can block thermal transfer 700 times better than aluminum.

What is the main benefit of energy-efficient doors?
Aside from improving the comfort level in your home, energy-efficient doors can reduce your energy bill by 35% or more.

If you have more questions about energy efficiency and energy-efficient doors in St. Louis, call us at Renewal by Andersen of St. Louis today at (314) 310-3636.

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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