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(720) 263-7039
The Most Trusted Replacement Window Company in Denver

Longmont’s Source for Replacement Windows and Doors

Renewal by Andersen serves Longmont and the greater Denver area with durable, energy efficient replacement windows and patio doors. We’re backed by over 100 years in the window industry to deliver the highest quality products, customer care, and installation value.

Learn more about our products and policies below, then get started today with an in-home consultation.

replacement window sale

The Renewal by Andersen Difference

Energy efficiency.

Renewal by Andersen windows are made with Fibrex® frames and lasting quality double pane glasses to protect your home from the elements.

Strength and durability.

All functioning windows are made to be used—so you can open and close them often in any weather without wearing down over time.

fibrex chart

Custom design options.

Create your perfect style from a wide range of options including up to 49 possible color combinations and choice of grille and hardware.

Light and views.

In any design, Renewal by Andersen windows upgrade the atmosphere of your home with narrow frames and wide, bright panes of glass.

Custom Windows for your Longmont Home

Renewal by Andersen is a full-service window company, which means we’re with you every step of the way from planning to installation. Our dedicated professionals provide consistent service throughout for total, one-company accountability.

Our home improvement process always begins with a direct, in-home design consultation. A qualified design consultant comes directly to you anywhere within our service area. Then, they’ll help you choose the product, style, and configuration options that benefit you most, and start planning the installation.

Certified master installers then install, seal, and insulate your new windows for a lasting, energy efficient home improvement in any climate. Their streamlined process is guaranteed to provide a hassle-free installation period for you—as well as a lasting limited warranty. They’ll even dispose of your old window or door, and leave your home cleaner than they found it!

Discover the Renewal by Andersen difference for yourself when you schedule a consultation for your Longmont home today.

Proudly Serving Longmont, CO

Let us help you with your next home improvement project! We offer custom design options for every aspect of your new window or patio door, and guarantee our work with an unmatched warranty for nearly any type of house. Get started today when you call or email us to schedule a design consultation for your Longmont home.

Arvada
Black Hawk
Brighton
Broomfield
Castle Rock
Centennial
Englewood
Highlands Ranch
Lakewood
Longmont
Morrison
Parker
Superior
Watkins

Enhance your Denver Views

Make the most of your Denver surroundings with narrow, Fibrex® frames by Renewal by Andersen. Fibrex® is offered exclusively by Renewal by Andersen, and holds large panes of glass with twice the strength of vinyl. That means your new window in any style provides a greater glass area than standard wooden or vinyl windows. See how you can improve your Longmont home with expansive yet energy efficient views today.

Custom, Energy Efficient Patio Doors, Too!

Like our windows, custom patio doors by Renewal by Andersen are made to last. Choose any of our three styles for unbeatably energy efficient performance, the easily design one with hardware, color, and grilles to complement your Longmont area house.

A hinged French door provides a classic look for your house, while contemporary sliding glass doors make the most of your view. Alternatively, you can combine your favorite features of both styles with a sliding French style—a Renewal by Andersen exclusive innovation.

All doors are custom-made to complement your home and life with beautiful, energy efficient accessibility. Whether you prefer a hinged or sliding configuration, your new home improvement is guaranteed to perform over time just as well as the day it was installed. Learn more about each style.

Renewal by Andersen Signature Fibrex® Material

Fibrex® frames are completely saturated with color during manufacturing, so you never have to worry about paint cracking or flaking off.
The unique blend of Fibrex® material allows your windows to be supported by narrow frames for a wide, sleek glass area.
All Renewal by Andersen windows are also guaranteed to function just as well as the day they were installed, so frames will never expand or bow.
Made from 40% recycled wood fiber by weight, Fibrex® provides the strength of wooden windows with the versatility of vinyl.

Get in Touch with Us

Call Renewal by Andersen Longmont to schedule your in-home consultation today. Our professionals are committed to simplifying every step of the process, so you can enjoy your new home improvement sooner than you think. Contact us to learn more about our hassle-free, 4-step process.