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.

Address Phone
Special Offer Today

$100 Off Each Window Installation With Purchase of 5 or more windows

Schedule a consultation with Les Grumdahl Window and Siding LLC to learn how Infinity can help you bring new life to your home.
Schedule Now

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
Learn more
GOOD BETTER BEST
STABILITY
Learn more
GOOD BETTER BEST
STRENGTH
Learn more
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.