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10 Best Window Replacement Companies in Longmont, CO

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Written By David Cusick

Last Updated June 2024

Windows play an important role in the appearance of your house, as well as its energy efficiency. Replacing your windows is an excellent way to increase the value of your home. If your windows are leaky or damaged, 25–30% of your house’s heat or cool air could be leaking out, according to the Department of Energy. In Longmont, this can add up to an extra $282 a year on your electric bills. Choosing the right company for you is an important decision. That's why we've curated this list of the best window installers in Longmont.

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Top 10 Best Window Replacement Companies in Longmont

Champion Replacement Windows of Ft. Collins

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5850 Byrd Dr, Loveland, CO 80538 (970) 744-2604 championwindow.com

Good customer service

Price transparency

Free assessment

Services Offered

Window replacement/installation
Bay windows
Glass doors
Double-hung

Champion Replacement Windows of Denver

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10035 E 40th Ave Suite 400, Denver, CO 80238 (303) 800-2129 championwindow.com

Good customer service

Free assessment

Price transparency

Services Offered

Double-hung
Bay windows
Glass doors
Window replacement/installation

Power Home Remodeling

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7304 S Joliet St #100, Centennial, CO 80112 (303) 357-2484 powerhrg.com

Good customer service

Services Offered

Window replacement/installation
Energy-efficient options

Renewal by Andersen Window Replacement

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14330 Longs Peak Ct, Longmont, CO 80504 (970) 305-5060 fortcollinswindow.com

Free assessment

Price transparency

Good customer service

Services Offered

Bay windows
Energy-efficient options
Glass doors
Vinyl frames
Window replacement/installation
Custom window designs
Double-hung
Metal frames

DaBella

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6600 E Hampden Ave, Denver, CO 80224 (720) 619-8704 dabella.us

Good customer service

Timely service

Services Offered

Vinyl frames
Glass doors
Double-hung
Window replacement/installation

Rocky Mountain Glass & Shower LLC

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13631 N 115th St, Longmont, CO 80504 (970) 347-9710 rmglass.com

Educational website

Price transparency

Good customer service

Free assessment

Services Offered

Window replacement/installation
Window repair
Tempered glass
Glass doors
Mirrors
Energy-efficient options
Glass showers

WestPro | Roofing, Siding, Windows

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1321 Sherman Dr, Longmont, CO 80501 (303) 834-9236 westproroofing.com

Good customer service

Price transparency

Educational website

Free assessment

Services Offered

Glass doors
Skylights
Window replacement/installation
Storm/impact windows

Custom Exteriors

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18674 Co Rd 3, Berthoud, CO 80513 (970) 460-8714 customexteriorsllc.com

Educational website

Good customer service

Price transparency

Timely service

Free assessment

Services Offered

Glass doors
Bay windows
Window replacement/installation
Vinyl frames

Slade Glass Co.

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504 5th Ave, Longmont, CO 80501 (303) 776-3400 sladeglass.com

Good customer service

Price transparency

Free assessment

Educational website

Services Offered

Mirrors
Glass repair
Glass showers
Window replacement/installation

Home Services at The Home Depot

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Home Depot, 393 S Hover Road, 393 S Hover St, Longmont, CO 80501 (720) 307-6246 homedepot.com

Free assessment

Good customer service

Educational website

Price transparency

Services Offered

Glass doors
Energy-efficient options
Window replacement/installation
Tempered glass
Glass showers
Today's Homeowner Ranking Methodology

Today's Homeowner looks at dozens of datapoints on window replacement companies to come up with our data-driven rankings. It's not possible for a company to pay for preferential treatment in our rankings. We look at the following key factors in determining who should top our list:

  • Company Experience
  • Real User Reviews
  • Company Reputation
  • Accreditations and Licenses
  • Service Area
  • Customer Service
Have questions about our methodology or company ratings? Reach out to FindAPro@TodaysHomeowner.com.

How Much Does Window Installation Cost In Longmont?

The cost of window installation or replacement varies based on several factors, including the materials you choose, how difficult your windows are to access or install, and the number and size of the windows. On average, homeowners in Longmont spend around $270 per window*. Below are additional cost breakdowns. *Cost data based on sample pricing for window installation from multiple retailers and adjusted for local cost of living.

When To Replace Windows

Installing new energy-efficient windows can substantially boost your home's value, comfort, insulation, appearance, and noise reduction. Some clear indicators it's time for new windows include the following:

  • Condensation issues, fogging between window panes, or rotting window frames that let in moisture.
  • Cold air and drafts leaking in from old, loose-fitting windows.
  • Windows that are difficult to close, open, or lock properly due to age and wear.
  • High energy bills and discomfort due to poor insulation.
  • Inefficient and outdated window styles that take away from your home’s curb appeal.

How To Choose a Window Company

Hiring a qualified window installer is critical to a successful project. Below, we cover the most important considerations when it comes to deciding which company to hire.

Experience

Look for an established local window company with a proven track record of success installing all types of windows. Experienced providers are more likely to understand Longmont's climate and will know how to meet your needs. To verify a provider's reputation, request references from recent customers.

Certifications

Select an installer that is certified by major window brands and groups like the Fenestration and Glazing Industry Alliance, formerly known as the AMMA. Appropriate accreditation means that a contractor is trained in best practices for installation. Confirm that installers are staff rather than subcontracted workers, and check that the technicians working on your project are certified.

Reputation

Read through online reviews, check the Better Business Bureau (BBB), and request local references. Review customer feedback to confirm that the company consistently provides quality work and good customer service. Avoid contractors that have complaints of shoddy work or unfinished jobs.

Process

The best company will take time to provide you with a detailed project plan, timeline, expectations, and reviews of all material and installation options. Beware of vague quotes or timelines that don't provide enough specifics upfront. Look for regular communication throughout the process to avoid surprises later on.

Warranties

Research companies that guarantee their installations and provide warranties on labor and materials. This demonstrates confidence in their window installations. Seek out unlimited lifetime warranties that can even transfer to new homeowners.

Materials

Confirm that a window provider offers windows built for longevity as well as leading energy-efficient window bands that fit your budget. Research choices with good energy ratings, enhanced UV protection, and design flexibility, and verify that the materials have their own manufacturer warranties.

Frequently Asked Questions About Window in Longmont, CO

In Longmont, the ideal time to install windows is during the late fall when the temperature is milder, so the windows can seal and settle properly. A professional local window installer in Longmont will be able to explain when the best time is to install windows on your house.

The right type of replacement windows for your Longmont home depends on when your home was built –the average house in Longmont was built around 1989. If your home was built a while ago, you might want to consider energy-efficient windows such as double-pane windows, which are designed to keep your home cool in the summer and warm in the winter. Wood frames also have a timeless look that's perfect for older homes. For newer homes, you can think about vinyl windows, which are durable, affordable and have a modern look.

The types of window that usually last longest are ones constructed from vinyl or wood, with triple glaze for extra insulation. Vinyl windows are renowned for their durability and require little maintenance, and wood windows offer a more classic look. Tripling up on the glazing will help reduce heating and cooling bills over time.

The typical window installation process can take anywhere from one to two and a half days, depending on the size and number of windows being replaced. This includes taking out the old windows, measuring for the new windows, installing the new windows, and sealing them in place. On average, it takes around 30 minutes to install each window.

Yes, most window companies offer financing options for their customers. Some installers provide low-interest or no-interest loans, although you may not qualify if your income is on the higher end, while other companies offer special financing plans with agreements and conditions that vary depending on the job.

Hiring a professional window installer helps guarantee the job is done correctly. Professional installers will measure your windows properly to get a perfect fit and use the right materials and techniques to ensure your windows will be properly sealed and secure. Additionally, professional installers have access to better materials and more knowledge than the average person, so you can expect your windows to be put in correctly and stand for years to come.

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