Infinity from Marvin: A Premium Fiberglass Replacement Window

As one of the largest manufacturers of made-to-order window and door products, Marvin continues to lead the industry in product design and function. Family-owned and operating under the leadership of the 4th generation, Marvin has grown to become an iconic Minnesota company with exceptional sales and service support.

Infinity from Marvin Replacement Windows was created to be a true differentiator in the market. Infinity was officially launched in October 2002 as Marvin’s dedicated replacement window product.

C&T Siding was selected as Infinity’s independent retail partner for our dedication to homeowners, ensuring your hassle-free window replacement project meets your expectations. Marvin is committed to quality, which is one of the reasons we’re proud to offer Infinity.

Replacement fiberglass window in kitchen

Why Choose Fiberglass Windows?

Thermal Performance

Ultrex® fiberglass windows meet or exceed ENERGY STAR guidelines. They keep out wind and moisture while protecting your home from hot summers and the coldest of winters. You’ll notice the difference in your energy bills each month.

Unbeatable Strength

Ultrex® fiberglass is eight times stronger than vinyl and three times stronger than vinyl/wood composites. There’s no need to worry about fading, chalking, peeling or cracking. Plus, there’s zero maintenance required.

Appearance & Design

Choose from a variety of window design options for both traditional and modern homes. Our windows feature the strength of fiberglass combined with popular style and design options, including divided lites and grilles.

Built For Midwest Winters

Fiberglass windows expand and contract at a slower rate than other materials such as vinyl. This means they reduce the risk of air leaks that can cause chilly drafts.

Total Design & Install

Our windows are designed with the features and options to fit your lifestyle. They’re also built to your specifications and delivered to your home ready to install. We take care of everything so you don’t have to.

Lifetime Transferable Warranty

Our fiberglass windows are backed by a 20-year warranty on glass seals and a 10-year warranty on manufacturer defects. Plus, we warrant our workmanship for the lifetime of your product. Transferable Life time warranty on manufacturer defects. 20 year warranty on glass.

Reliability & Expertise

For over 45 years, we’ve been dedicated to ensuring homeowners receive the best fiberglass windows and service available. You can trust us to deliver a beautiful finished product you can be proud of.

Features and Benefits of Fiberglass Windows

Infinity uses fiberglass because it outlasts and outperforms the competition. The proprietary Ultrex fiberglass offers unsurpassed durability and timeless style.

The benefits of fiberglass include being eight times stronger than vinyl, having low expansion rates for a weathertight seal, and an acrylic finish three times thicker than the competition to resist chalking and fading.

Beautiful Windows—Inside & Out

Custom Millwork to Match the Style of Your Home

With an on-site mill, we can match your new window trim to the trim within your home. Before we install your new windows, we remove a piece of trim, take it to our shop and mill the rest of your trim for a perfect fit.

Infinity® from Marvin® offers Everwood, a stainable fiberglass interior. If you choose Everwood, we’ll take your trim and stain to ensure your window’s interior color matches, too.

Pre-Stained or Painted Trim Gets the Job Done Faster

If you choose one of Marvin’s window color interiors, we custom stain or paint your window trim to match. We do this once inside our shop and apply the final coat after installation. This includes filling every nail hole and caulking the edges for a seamless look.

Company that installs fiberglass windows from Marvin

Get Inspired by Our Work

Since 1978, the C&T Siding team has been helping homeowners refresh their homes with new windows. We’ve completed hundreds of projects throughout Minneapolis/St. Paul and western Wisconsin. Check out some of our recent projects to help inspire your own.

House siding
House siding

Frequently Asked Questions

Fiberglass windows are the best windows available for your home. Cost depends greatly on the size of the window and design choices. The average cost of a fiberglass window is around $3,000.

Fiberglass windows will last about 30 years with proper installation and care. They’re the longest-lasting windows available on the market today.

Yes. Wood will deteriorate over time, especially in the harsh Upper Midwest elements. Fiberglass windows expand and contract slower than other materials. This means they help prevent air leaks that cause chilly drafts and cool air loss—something wood cannot do.

Yes. We’ll work with you to custom paint or stain your fiberglass windows to match the interior of your home.

If your fiberglass windows have an acrylic finish, they will fade very little over time. At C & T Siding, we finish our windows in this way to help improve their longevity.

Fiberglass windows have zero conductivity. This means they’re the most energy-efficient windows on the market. They expand and contract at a slower rate, preventing heat loss in the winter and cool air loss in the summer.