Fiberglass Windows

Fiberglass window replacement and installation

Fiberglass windows provide superior performance that protects your home from the Upper Midwest weather. C&T Siding offers complete fiberglass window sales and installation for homeowners in the Minneapolis and St. Paul areas. We stand by fiberglass windows because of their impressive durability, sturdy construction, and proven energy-efficiency.

Fiberglass has become more popular with homeowners in the area, and we can help you discover why. To find out more about our fiberglass window products, contact C&T Siding today at 651.483.6146 or visit our showroom.

Infinity from Marvin: The Ultimate Marvin Fiberglass Replacement Windows

Our windows and doors are constructed utilizing Ultrex® fiberglass. This ultra weatherproof material outlasts vinyl, aluminum, and fiberglass composites. It can endure the harshest Minnesota and Wisconsin winters and keep you and your family comfortable all year long.

Ultrex® windows set the highest standards in the industry and consistently meet or exceed regulations for residential windows. Why do we love these windows? Read below to find out more.

Why Choose Fiberglass Windows

Fiberglass residential windows offer notable advantages over traditional aluminum, vinyl, or wood windows:


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


Ultrex® fiberglass is eight times stronger than vinyl and three times stronger than vinyl/wood composites. You don’t have to worry about fading, chalking, peeling and cracking, or ongoing needless maintenance. They consistently rank high for durability in consumer reports.


We offer a variety of window design options that work well in both traditional and contemporary settings. Our windows feature the strength of fiberglass combined with popular styles and design options, including divided lites and trim.


Our window experts are dedicated to ensuring that you receive the best fiberglass windows in the industry. Our products are only matched by our consistent high-level service that completes your entire window shopping experience.


C&T Siding windows are designed with the features and options to fit your lifestyle. Our products are built to your specifications and delivered to your home ready to install. We use Ultrex® pultruded fiberglass windows which are backed by a 20-year warranty on glass seals with a 10-year warranty on manufacturer defects.

Schedule A Window Installation Today

If you are ready to revitalize your home with new fiberglass windows, then contact C&T Siding today. We can help you find the windows you want and install them to your exact specifications. We specialize in residential windows, doors, and siding.

To find out more about C&T Siding products and services in Eastern Minnesota or Western Wisconsin, or to schedule a free estimate, call us today at 651.483.6146. You can also send a message on our contact page.


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