Infinity Partner Detail

Les Grumdahl Window and Siding LLC

Infinity from Marvin hand-selected us as their Independent retail partner based on our expertise and passion for serving our community.

Infinity Replacement Windows

Infinity Windows from Les Grumdahl Window & Siding in Duluth, MN

Les Grumdahl Window & Siding is a replacement window company trusted by residents of Duluth, MN to provide top quality products and first-rate service. Our goal is to help make your home feel more comfortable & energy efficient, all while delivering a home remodeling experience that is smooth and stress-free. Aside from Infinity replacement windows from Marvin, Les Grumdahl Windows & Siding also specializes in siding.

Learn more about the options and durability of Infinity replacement windows from Les Grumdahl Window & Siding today.

Les Grumdahl Window and Siding LLC
1626 London Rd
Duluth, MN 55812

(218) 728-3060

Special Offer Today
$100 Off

Each Window Installation
With Purchase of 5 or more windows.

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“ We attended the Spring Home Show and looked into 3 different brands of windows. We did our research and were most impressed with Infinity from Marvin. Not only because of the window itself but also because they could match the oak floors, trim, and oak cabinets. Not only did they match it but it looks incredibly beautiful. We chose to add the bow window. It was perfect. Steve was a knowledgeable and sincere salesman. The service was incredible, the installers, more incredible. The team sent up here were meticulous about every fine detail of the installation and very thoughtful about our time, home and space. And...the windows are fantastic. Good investment. Highly recommend them over other name brands. ”

Skip and Robin

Built to last with Ultrex fiberglass

Infinity from Marvin fiberglass windows and doors are built with Ultrex® fiberglass making Infinity windows stronger than vinyl windows and requiring less maintenance than wood windows.

COMPARE INFINITY Vinyl Vinyl/Wood Composites (Fibrex®) Infinity Ultrex® Fiberglass
DURABILITY
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GOOD BETTER BEST
STABILITY
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GOOD BETTER BEST
STRENGTH
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GOOD BETTER BEST

Fibrex® is a registered trademark of Andersen Corporation.

Explore Infinity’s fiberglass window and patio door collection

Browse our complete replacement window patio door collection to learn how Infinity from Marvin fiberglass windows offer durability, style and strong performance.

Explore Infinity’s fiberglass window and patio door collection

Browse our complete replacement window patio door collection to learn how Infinity from Marvin fiberglass windows offer durability, style and strong performance.