Frequently Asked Questions Regarding Replacement Windows


Renewal® by Andersen has long been on the leading edge of window innovation. As windows continue to progress and become more and more complex, it is difficult to keep up with all of the latest updates. It is natural to have questions regarding your windows when things change so rapidly. That is why we’ve put together this list of Frequently Asked Questions, in the hopes that we will be able to keep you better informed on our windows, our process, and our warranties.

As always, if you have additional questions we encourage you to call us here at Renewal by Andersen® of Milwaukee or schedule an appointment with our local window experts.


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. However, Renewal by Andersen of Milwaukee not only installs replacement windows in existing openings, but often installs new window styles such as a bow or bay window in place of a large window opening or creates an entirely new opening altogether. Our internal team handles the process from start to finish allowing homeowners to update the look of their home in a whole new way.

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. Visit our Glass Options page.

What is Fibrex®?

Fibrex® is a maintenance free product. Fibrex® is a wood composite that lasts longer, performs better, is twice as strong as vinyl and unlike wood, requires no maintenance. 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 Renewal by Andersen® of Milwaukee window replacement to save you up to 25% on your energy bills⁴. Visit our Energy Efficiency & Savings 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.

What are the styles of windows we offer?

Double Hung, Casement, Gliding, Awning, Picture, Bay/Bow, Specialty, visit our Windows page.

How does it compare to other types of windows?

Renewal by Andersen® Fibrex® windows are warranted not to flake, rust, blister, peel, crack, pit or corrode. Plus, our windows stand the test of time and are as easy to operate after 20 years as the day they were first installed.*

What colors or types of wood do your windows come in?

We offer pine, oak, and maple wood interiors. These interiors can be custom stained to match your home. We also offer a variety of solid rich matte colors such as: White, Canvas, Sandtone, Terratone, Dark Bronze and Black (new).

What is our warranty?

20 years on the glass and frame, 10 years on screens, hardware, and all moving parts, and 5 years on installation. Visit our Warranty page.

Are we the same as Andersen®?

We are the top line window division of Andersen® — Andersen® corporation is our parent company. We are the start-to-finish replacement window division of Andersen® called Renewal By Andersen® of Milwaukee proudly serving southeast Wisconsin. Andersen® has many lines of windows, we are a line in ourselves. We offer a product that no other line of Andersen® can offer. Everything we offer is completely custom to match the rest of your home.

How long have we been in business? Andersen® AND Renewal by Andersen®:

Andersen® has been in business since 1903—Renewal by Andersen® has been in business since 1995 and Renewal by Andersen® of Milwaukee has been operating since 2000.

Who does our installation?

We here at Renewal by Andersen of Milwaukee install all of our windows and doors. We are Certified Master Installers. We do not use subcontractors. This way we can warranty our product and installation the best way possible. We produce, install, and service our windows and doors.

What makes you different than other companies?

Our revolutionary Fibrex® material that stands the test of time. No subcontractors. Longevity of company. Non-prorated warranty. 12 month quote. Low pressure and a respectful approach to customer consultations. WILL allow 1 party appointments.

Hear From Our Customers

This was a great crew to work with. Both the original install manager we worked with (Jay) and the install team (Daniel, Mason, Tony, Ethan, and Jose). Everyone was very professional and knowledgable. They answered all my questions and the end result on the house is great. In 3 days they replaced an old bay window with a new bay window, a set of french doors on the patio with a sliding patio door, and our old front door with a new front door and storm door.

I cant express how happy we are with choosing Andersen for our window installation. Our sales representative was knowledgeable with product and answered any questions we had without hesitation. I did also fill out a survey that was sent in an email, but sadly I failed to personally name the two gentlemen that performed the actual installation. Barrett and Francisco were our guys, and let me tell you, they were outstanding!!! They did Excellent work and were professional as well as efficient and made this a smooth, none evasive process for us. I strongly recommend this company and these installers to anyone in need of windows!!! My husband and I could not be more pleased we chose Andersen for replacing our windows!!!

Jason and Brett did an awesome job installing our doors. We had separate installers a month earlier for our windows who also did a fantastic job. They were all very professional and cleaned up almost better than the area looked before the installation! Since these were both jobs that took more than one day the installers were great at keeping us informed on the status of where the project was at along the way.

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Since its founding in 1977, the Alliance to Save Energy has been a leader in energy efficiency policy and advocacy. Over the years, the Alliance’s programs and priorities have evolved as U.S. energy efficiency policy has grown.