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Windows Replacement Services


Below is a list of questions to help you learn more about our products and services.

How do I make the best choice about where to buy replacement window?

Always look for a quality window brand name. Companies who have been manufacturing windows for decades have set the standard for developing the best window technology and that will give you piece of mind in knowing they’ll be here to stand behind their warranties. When it comes to making choices for your home, you are wise to work only with companies that have proven reputations. Tough economic times have been hard on many window companies, forcing many to shut their doors. Andersen® windows have been around for over 110 years, thus putting us through many tough economic times including the Great Depression, the recession in early 1980s and now our current recession. Our family-owned business is here for the long run

What is the difference between Renewal by Andersen® and Andersen® windows?

Renewal® is the division of Andersen ® Corporation developed strictly for the replacement market. Andersen® makes standard sized windows for new construction and Renewal® makes custom sized windows for the replacement market. Renewal® windows are made from a composite material called FIBREX™, while most of our standard sized windows are vinyl-clad wood windows. Renewal® is the only division of Andersen® Corporation that includes a warranty both on the window, and most importantly, the installation.

What type of glass do you use?

High-Performance™ Low E-4® Smart Sun™ glass is the most energy-efficient glass option we have ever offered. Compared to ordinary dual-pane glass, High-Performance™ Low E-4® Smart Sun™ glass is 45% more energy-efficient in the winter and 70% more efficient in summer. * It has our highest efficiency rating in cold weather and is exceptional in hot climates where solar heat gain can lead to excessive air conditioned expense. Smart Sun™ glass blocks the sun’s heat, while letting in almost as much natural daylight as clear glass, reducing your need for artificial lighting. What’s more, SmartSun™ glass blocks an amazing 95% of harmful UV rays which helps reduce fading on your carpet, drapes, artwork and furniture but has virtually no effect on the clarity or color of the light that enters your home.

*Values are based on comparison to U-factors and SHGC’s for clear glass non-metal frame default values for the 2006 International Energy Conservative Code (IECC).

What does it mean if windows are Green Seal Certified and/or Energy Star rated?

Green Seal Certification is the national nonprofit environmental organization the awards a “Green Seal” to products the meet environmental standards for energy efficiency.

Energy Star® is a registered trademark for the U.S Environmental Protection Agency. Energy Star® windows are rated by the National Fenestration Rating Council, an independent industry-wide standard for rating window based on thermal insulating performance.

Our windows are all Energy Star qualified for all climate zones and all Renewal® by Andersen windows are Green Seal certified.

Who does your installation?

Renewal by Andersen® technicians are factory-trained employees. Quality window installation is a critical component of any successful window replacement project. Even the highest quality windows will underperform if installed incorrectly. While most window manufacturers exclude installation labor in their warranty, we are so confident in the quality of our window installation process, that it is included under our manufacturer’s written warranty.

Why does condensation collect on my windows?

First, know that condensation and fogged panes, also known as seal failure, are two different things. Seal failure (fogged panes) happens when moisture gets in between the two panes of glass. If you can clean the moisture, it is condensation, not seal failure.

Condensation is not necessarily a window problem. It occurs any time warm, moist air comes into contact with a cooler surface. Condensation can cause paint to peel or flake, wood to rot, and mold to grow.

On the outside of the window, condensation is just dew –just like the dew that gathers on grass. The window merely provides a place for dew to form. This is not a problem.

Condensation on the inside of a window is a sign that your house may have excess humidity or has poor performing windows, or a combination of the two. Often this happens in homes during the winter, as the warm moist inside air comes into contact with colder windows.

Excess humidity can come from a variety of sources, including cooking, humidifiers and taking baths and showers. To reduce condensation, make sure your home is well ventilated and avoid using a humidifier during the window if you can.

Note: More efficient windows, with high performance glass, will reduce and possibly eliminate condensation depending on interior humidity levels.

What is FIBREX™?

FIBREX™ is a revolutionary, patented wood/vinyl composite material made exclusively by Andersen. Because it combines the strength and classic look of wood with the rot-resistant, maintenance-free qualities of vinyl, FIBREX™ offers the features and benefits of the two most popular types of window materials on the market.

Why is thermal expansion so important with windows?

Thermal expansion is any change in the volume of a material when it is subjected to changing temperatures. Vinyl is extremely vulnerable to thermal expansion while FIBREX® and wood are not. Excessive thermal expansion can lead to warping or bowing of the window frame, resulting in drafty and fogged windows. This is especially important in the upper-Midwest, where temperature extremes are the greatest.


ToolsWhat’s the down side of wood windows?

Wood is classic. It looks good. It’s strong. It’s a great insulator. However, wood rots. When water gets on wood, the growth of fungi begins. If you’ve seen a rotting log in the woods, you know what it looks like. Over time, the rotting wood windows tend to become fogged and drafty and sometimes they just fall apart. While wood windows usually come with a sealant or primer to protect the wood from rotting, this wears down over time. Wood windows require regular maintenance, and often it’s just an uphill battle against rot. Renewal® by Andersen windows give you peace of mind because our windows are of Fibrex™, but best of all, gives you the same look as beautiful wood windows, without the worry and maintenance associated with wood windows.

What is the downside of vinyl windows?

Vinyl windows are made of Polyvinylchloride and are inexpensive to manufacture. However, by itself, vinyl windows are subject to thermal expansion, deterioration from ultraviolet light exposure, warping, bowing and discolorations. To counter this, many vinyl windows come reinforced with metal bars or extra vinyl. This adds some strength to the window, however, reinforced vinyl window frames are very bulky, taking up large amounts of glass and ruining your view. With FIBREX™, however, the vinyl PVC bonds to wood fibers. The wood gives the vinyl strength, keeping it from warping or peeling away. And the vinyl protects the wood from moisture and rotting. Plus, since FIBREX™ is so strong, you get narrow window frames, plenty of glass and an amazing view.


"We love our new windows and Nate and Colton were great workers – thanks guys!"

Shannon B. - West Des Moines
May 2014

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