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Get To Know

The Nex-Gen


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We’re a specialty window and door replacement company serving homeowners along Colorado’s Front Range, southern Wyoming, and the Colorado Springs area. Customers trust our professional expertise and guidance, our superior Infinity from Marvin window products, and the reliable installation, support, and service we bring to every remodeling project.


We’re not just another big window company. We care about your experience, and we care that you’re pleased with the end result and everything that happens along the way. A lot goes into the decision to remodel.

We look out for your best interests. We won’t let you get into a situation that’s not right for your home or doesn’t meet your objectives. 



To exceed your expectations for a superior product and satisfying remodel experience, from start to finish.


We educate and empower our customers to make window and door selections that suit your home and increase the value of your investment. We respect your time and your wishes, pay attention to the details, and provide service you can count on, now and for years to come.


We pledge to guide and support you in the selection of high-quality windows and doors that resolve your current issue and complement the look and style of your home. We bring design and technical expertise to your project, and promise a seamless, non-disruptive installation process, with results you will love.



Ted Rajewski starts home improvement company

Ted and partner start H-R Home Improvement, a residential and commercial roofing and siding company. The industry is expanding with the introduction of products designed to improve the look and performance of older homes. Ted is quickly known as the man who takes on tough projects.


Recruited by national home improvement corporation

Ted relocates to Denver to open a corporate branch office and develop sales and service teams. He acquires valuable knowledge about best practices and innovative home improvement products. His young son, Brent, tags along on service calls.


Leaves corporation to start local company

Ted re-establishes a local business specializing in windows, doors, siding, and patio enclosures. Brent spends summers working at his dad’s company, honing his installation skills and problem-solving abilities. After college, Brent joins the company and learns first-hand every aspect of the business.


Brent steps into leadership role at Nex-Gen

Now at the helm of the business he has grown up in, Brent envisions the company moving toward innovative product solutions, more efficient installation methods, and a better customer experience. The mid-2000s are a period of rapid growth for Nex-Gen.


Nex-Gen partners with reputable national brand

Recognizing the benefits of a fiberglass product in Colorado’s climate, Brent forms a partnership with Infinity from Marvin, the window company’s innovative replacement product.


The Future of Nex-Gen

Nex-Gen’s commitment to quality continues to fuel their growth, now and for years to come.

From the initial contact at the Greeley Home Show, to the actual sale meeting, to the measuring session, through installation and final staining and sealing, our experience with Nex-Gen was exemplary. Friendly people, quite knowledgeable, and highly enthusiastic about their products, the fellas made buying our bay window easy and fun, too.

We are impressed with the quality of workmanship of the window itself, and with the professionalism and talent of our installer, Brent. He was efficient, and precise, getting the entire complicated procedure completed in one session of less than 8 hours. He was very careful with tools, very cognizant of the fact that he was in our home with us, and he cleaned up his work impeccably. We will do business with Nex-Gen again, hopefully soon. I recommend them and their work absolutely without hesitation.

Improving your home, protecting your investment

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